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What is one common cause of pulp death or disease?
Trauma
Extensive caries
Periodontal disease
Deep filling
Why is endodontics preferred over tooth extraction?
It is more painful
It is less effective
It is more traumatic
It is much less invasive
What is the main focus of endodontics?
Clean the gums
Eliminate the focus of infection
Extract the tooth
Fill the cavity
Which procedure is NOT part of endodontics?
Pulpotomy
Vital pulp therapy
Pulpectomy
Tooth extraction
What is the first step in root canal therapy?
Dental radiograph
Root canal access
Obturation
Pain management
What is used for pain and anxiety management during root canal therapy?
General anaesthesia
No medication
Only anti-anxiety drugs
Local anaesthesia
What materials are used for obturation in root canal therapy?
Gutta percha
Amalgam
Composite
Zinc oxide eugenol
What is the purpose of a rubber dam kit in endodontics?
Cleaning the gums
Restoring the tooth
Isolation of the tooth
Filling the cavity
What is the role of sodium hypochlorite in endodontics?
Filling material
Disinfection
Temporary restoration
Anaesthesia
What is the coronal portion of the pulp cavity called?
Dentin
Pulp chamber
Root canal
Apical foramen
What is the purpose of using paper points in root canal therapy?
Filling the canal
Accessing the pulp
Drying the root canal
Cleaning the tooth
What is a common medicament used in endodontics?
Amalgam
GIC
Calcium hydroxide
Composite
What is the term for the root of the pulp chamber?
Pulp chamber
Root canal
Dentin covering the pulp chamber
Apical foramen
What is the purpose of testing pulp vitality?
To assess the health of the pulp
To clean the tooth
To extract the tooth
To fill the cavity
What does pulpotomy involve?
Cleaning the gums
Removing the entire tooth
Filling the root canal
Removing part of the pulp
What is apexification?
A method of extraction
A type of filling
A type of anaesthesia
A procedure to close an open apex
What is the pulp horn?
Opening in the floor of the pulp chamber
Wall of the pulp chamber
Accentuation of the roof of the pulp chamber directly under a cusp or developmental lobe
Canal leading into the root canal
What does the floor of the pulp chamber consist of?
Dentin bounding the pulp chamber near the cervix of the tooth
Pulp tissue
Enamel covering the tooth surface
Cementum at the root apex
What are canal orifices?
Walls of the pulp chamber
Root apex
Pulp horns
Openings in the floor of the pulp chamber leading into the root canal
How are the walls of the pulp chamber named?
From the corresponding walls of the tooth surface
From the pulp tissue
From the root apex
From the type of canal
What is the apical foramen?
An aperature at or near the apex of a root for vessels and nerves
Wall of the root canal
Opening in the pulp chamber
Surface of the tooth
What shape is the apical foramen in young teeth?
Triangular
Funnel shaped with the wider portion extending outwards
Square
Circular
What fills the mouth of the funnel in the apical foramen?
Dental pulp
Periodontal tissue
Dentin
Cementum
What is the minor diameter in the root canal?
Diameter at the root apex
The narrowest diameter of the canal within the dentin
Diameter at the canal entrance
Widest part of the canal
What is the average distance between the minor and major diameters in young adults?
0.525mm
0.75mm
0.659mm
1.0mm
What prognosis is most favorable in endodontic procedures?
When procedures are at the apex
When procedures are more than 2mm away from the minor constrictor
When procedures extend beyond the minor constrictor
When procedures are terminated at the minor constrictor
What are lateral canals?
Canals leading to the pulp chamber
Openings of accessory canals
Branches off the main root canal
Canals located at approximately right angles to the main root canal
What are accessory canals?
Canals at the apex
Canals that branch off the main root canal
Canals that run parallel to the main canal
Openings of lateral canals
What can cause the formation of accessory canals?
Infection in the pulp
Genetic factors
Mild trauma during development of the root apex
Excessive cleaning of the canal
What happens to accessory canals as the tooth ages?
They become more numerous
Some become obliterated by further dentin and cementum formation
They grow larger
They disappear completely
What are clinical implications of accessory canals?
They can act as avenues for smear of infection
They have no clinical significance
They are always visible on X-rays
They strengthen the tooth structure
What is vital for a successful coronal access preparation?
Employing sedation techniques
Knowledge of the prior anatomy
Understanding the patient's history
Using the latest technology
What is the first step in coronal access preparation for endodontics?
Knowledge of the prior anatomy
Knowledge of the external anatomy
Practise skills
Choosing the correct instrument
What imaging technique is recommended for understanding canal location?
Ultrasound imaging
3D imaging
2D X-rays
MRI scans
What is the purpose of applying a rubber dam during endodontic procedures?
To speed up the procedure
To prevent bleeding
To numb the area
To allow for proper visualization
What is included in the armamentarium for endodontic access preparation?
Patient history
Bur diameter and length
Suture material
Anesthesia type
What does coronal cavity preparation involve?
Only outline form
Only removal of carious dentin
Outline form, convenience form, removal of carious dentin
Only convenience form
What is the goal of achieving a straight line access in cavity preparation?
To make the cavity larger
To prevent tooth decay
To remove more dentin
To reach the apical foramen
What does the outline form of the cavity depend on?
The size and shape of the pulp chamber
The color of the tooth
The type of anesthesia used
The age of the patient
Why is the removal of carious dentin important in endodontic preparation?
To make the filling process easier
To enhance tooth sensitivity
To improve tooth color
To eliminate bacteria from the tooth interior
What is the purpose of the convenience form in cavity preparation?
To allow unobstructed access to the canal orifice
To prevent bleeding
To reduce pain during treatment
To make the cavity look better
What must be done before starting radicular preparation?
Fill the cavity
Take another X-ray
Apply anesthesia
Toilet of the cavity
What can influence the size of the outline form in cavity preparation?
The type of rubber dam used
The color of the filling material
The size of the pulp chamber
The patient's age
What is the primary reason for removing defective restorations in cavity preparation?
To make the cavity larger
To reduce treatment time
To eliminate bacteria and discolored structure
To improve aesthetic appearance
What is the main focus of coronal cavity preparation?
Only removal of caries
Outline form and convenience form
Only outline form
Only convenience form
What is the risk of not removing all debris from the cavity?
Bacteria-laden saliva may leak into the cavity
The filling material may not adhere
The tooth may become more sensitive
The procedure will take longer
What factors influence the shape of the pulp chamber?
Age of the dentist
Condition of the patient's gums
Individual root canals and their curvature
Type of filling material
What is the purpose of cavity expansion during filling techniques?
To reduce the cost of treatment
To make the procedure faster
To accommodate heavier instruments
To improve patient comfort
What should be done if the tooth is calcified or has other complications?
No special consideration needed
Immediate extraction of the tooth
Delayed rubber dam application may be required
Use of stronger anesthesia
What must be removed from the chamber before radicular preparation begins?
All caries, debris, and necrotic material
Only caries
Only debris
Only necrotic material
What can happen if calcified debris is left in the chamber?
It will promote healing
It will dissolve
It may obstruct canal enlargement
It will enhance visibility
What might soft debris carried from the chamber increase?
Visibility
Patient comfort
Dentin strength
Bacterial population in the canal
What is the average distance from the occlusal surface to the roof of the pulp chamber?
6-8 mm
2-4 mm
4-6 mm
8-10 mm
What should be done if you do not find a pulp chamber where expected?
Ignore the issue
Take a radiograph and get help
Continue removing dentin
Use a larger bur
Which bur is used for tooth colored restorations?
Endo Z bur
Number 2 and 4 diamond burs
Trans metal bur
X-Gates
What is the purpose of a safe end carbide bur?
Enhances visibility
Prevents perforation of the pulp chamber floor
Increases cutting speed
Removes more dentin
Where is access typically started for posterior teeth?
In the middle of the occlusal surface
Near the gingival margin
At the edge of the tooth
On the buccal surface
What should be done once the pulp cavity is open?
Seal the cavity immediately
Start filling the cavity
Enlarge the opening to expose all root canal orifices
Apply medication
What should be verified using a probe?
The size of the cavity
The type of bur used
That the unroofing is complete
The patient's comfort
What is the goal when refining the overall outline of the cavity?
To make it narrower
To have a slightly divergent cavity
To have a straight outline
To make it deeper
What should be visible with one direct line of sight after refining the cavity?
Only the main canal
All canal orifices
The outer wall
The pulp chamber only
What is the purpose of using lateral movements when enlarging the opening?
To prevent bleeding
To create a smoother surface
To remove excess dentin
To expose all root canal orifices
What type of bur should be used once the pulp is reached?
A round bur
A diamond bur
An end-cutting bur
A non-end-cutting bur
How should undercuts and pulp horns be removed?
By scraping with a probe
By using a laser
With a large bur
Using a small round bur in pulling motions
What is the average distance to the floor of the pulp chamber?
8-10 mm
4-6 mm
2-4 mm
6-8 mm
What can longer shanked burs help prevent during preparation?
Injury to the patient
Excessive dentin removal
Inaccurate measurements
Obstruction of vision
What should be visible with one direct line of sight in a ly divergent cavity?
Only the mesial wall
Only the central pit
All canal orifices
Only the distal wall
Where should you start when accessing mandibular molars?
Apical foramen
Central pit
Distal pit
Mesial wall
What makes it difficult to predict the tilt or rotation of a tooth under a crown?
Radiographs provide clear images
Actual tilt or rotation is misleading
Light penetration is always sufficient
Crowns are always well-fitted
When should crowns and extra-coronal restorations be removed?
When there is no caries
When the crown is too old
Inadequate margins of the restoration
When the patient requests it
What is a common challenge in accessing teeth with minimal or no clinical crown?
Difficult in older adults with pulpal recession
Always requires rubber dam
Always easy in any age
Only difficult in young patients
What is the first instrument used in the cleaning and shaping process?
Probe or exploring instrument
Irrigation syringe
Hand file
Rotary instrument
What is the main goal of biomechanical preparation?
Combine biological and mechanical objectives
Focus only on mechanical objectives
Focus solely on biological objectives
Only prepare the apex
Which objective involves avoiding forcing necrotic debris beyond the foramen?
Mechanical objective
Design objective
Irrigation objective
Biological objective
What is a key aspect of radicular preparation?
Ignoring the apical foramen
Only filling the canal
Thorough debridement of the root canal system
Only shaping the canal
What should the cross-sectional diameter of the root canal preparation do?
Be wider at the apex
Be narrower at every point apically
Be wider at the access
Be uniform throughout
What is the purpose of creating sufficient space for intra-canal medicaments?
Increase canal diameter
Limit irrigation
Decrease working length
Remove all tissue from the root canal space
What is the purpose of probing and exploring during root canal treatment?
Limit access to the canal
Magnify tactile sensation
Avoid using instruments
Increase pressure on the tooth
What rule should be used if the pulp chamber is not located after the depth has been reached?
FLIP rule
RULER rule
DIVE rule
SLOB rule
What does the term 'chemo-mechanical preparation' refer to?
Involves both mechanical and chemical components
Preparation without instruments
Only mechanical preparation
Only chemical preparation
What should be the shape of the root canal preparation?
Be wider at the apex
Be a straight line
Flow with the shape of the original canal
Have no specific shape
What is often difficult to trace at the apex?
Files larger than a 30 ISO file
Files smaller than a 15 ISO file
Files of any size
Only hand files
What is a key feature of the apical foramen during preparation?
It should be removed
It should remain in its original position
It should be repositioned
It should be enlarged
What is the ideal histological landmark to terminate endodontic treatment?
Canal orifice
Cavosurface margin
Apical foramen
CDJ
What should be the approach when determining the working length?
Use only tactile sensation
Use all possible methods and equipment
Use only radiographs
Skip sizes when using instruments
Which instrument should be used cautiously and only when canals are wide enough?
Stainless steel files
Barbed broaches
Reamers
K-files
What is the recommended action when encountering resistance with smaller instruments?
Retreat and bounce back
Change direction immediately
Push harder
Use larger instruments
What is the primary objective of resistance form in root canal therapy?
Achieving maximum filling
Reducing irrigation
Increasing canal size
Prevention of overfilling
What is the recommended motion for manipulating hand root canal instruments in a straight canal?
Wiggle back and forth
Pull out quickly
Push straight down
Rotate clockwise continuously
What should be done after using pre-curved instruments?
Wipe clean and relubricate
Store them without care
Discard them
Use them without cleaning
How should the apical third of the canal be enlarged?
To a size three times larger than the first instrument that binds
To a size smaller than the first instrument
To a random size
To the size of the first instrument
What is the proper technique for reaming in root canal therapy?
Counterclockwise rotation
No rotation
Clockwise rotation of the instrument
Back and forth motion
What is the purpose of meticulous cleaning of cavity walls?
To achieve a glassy-smooth feel
To remove all debris
To prepare for filling
To make the cavity larger
What should be considered when pre-curving files?
Files should be straight
Curvature is not important
The magnitude of the curvature must be slightly greater than the canal
Only larger files need pre-curving
What is the technique called for using pre-curved instruments?
Straight pull method
Push and pull technique
Watch winding action
Twist and turn method
What is the primary action of endodontic reamers when cutting dentin?
Pushing down to compact
Rotating counterclockwise
Twisting clockwise to engage blades
Pulling out to disengage
Which type of files may use a reaming action effectively?
H-files
Conventional K-files
Steel reamers
Ni-Ti hand files
What motion is used when filing with Hedstrom or K files?
Rotating motion
Side-to-side motion
Clockwise motion
In and out motion
What is a key characteristic of the balanced force technique?
Employs K-type files with non-cutting tips
Requires constant clockwise rotation
Uses only steel reamers
Involves no tips at all
What is the objective of the balanced force technique in endodontics?
Reduce file usage
Increase canal size
Create control over undesirable cutting
Enhance irrigation access
What advantage does the balanced force technique provide in curved canals?
Less canal transportation
Increased risk of ledging
More debris extrusion
Greater file wear
What is a disadvantage of the balanced force technique?
Less need for coronal cleaning
Easier irrigation access
Reduced canal size
Risk of instrument fracture
What is the main premise of standardized preparation in endodontics?
Curved canals are easier
All canals are straight
Most root canals are circular in cross-section
Preparation is not needed
What is a limitation of standardized preparation techniques?
Requires no cleaning
Not commonly practiced anymore
Only for curved canals
Always effective for all canals
What should be done after introducing the smallest reamer in standardized preparation?
Rotate counterclockwise
Withdraw and wipe clean
Leave it in place
Use a larger reamer immediately
What is a potential risk when preparing narrow and curved canals?
Easier cleaning
Transportation during preparations
Increased canal size
Less debris extrusion
What is the main goal of creating an apical control zone?
To remove all dentin
To increase canal width
To form a rapid canal taper
To create a straight canal
What is the main objective of step back preparation in endodontics?
Maximize debris extrusion
Minimize irrigation
Create a straight canal
Produce a flared canal suitable for obturation
What is a potential disadvantage of the step back preparation technique?
Better apical control
Increased irrigation effectiveness
Easier canal shaping
Potential extrusion of debris
What does the passive step back technique aim to achieve?
Rapid enlargement of the canal
Gradual enlargement of the canal in an apical-coronal direction
Only apical preparation
Coronal access only
Which technique involves enlarging the coronal and middle thirds before apical preparation?
Standardized technique
Passive step back
Double flared technique
Step down or crown down preparation
What is a key advantage of the step down preparation technique?
Reduces tactile awareness
Creates a narrow canal
Increases working length variability
Immediately achieves straight line access
What is a disadvantage of the crown down preparation technique?
Easier to master
Technique requires adapting to different canal shapes
Better apical control
Less effective irrigation
What is the purpose of using Hedstrom files in step down preparation?
Prepares the apical third
Removes all pulp immediately
Creates a flared preparation in the coronal half
Increases canal curvature
What is the double flared technique indicated for?
Teeth with necrotic or gangrenous pulps
Teeth with vital pulps
Teeth requiring no treatment
Healthy teeth
What is a common risk associated with narrow canals during preparation?
Reduced canal curvature
Ledge formation
Increased irrigation
Better tactile awareness
What is one of the main advantages of the passive step back technique?
Requires more forceful techniques
Reduces risk of procedural accidents
Improves coronal binding
Increases debris extrusion
What is the primary objective of the modified flared preparation technique in endodontics?
To increase canal curvature
To enhance tooth sensitivity
To produce early coronal flaring and reduce apical debris extrusion
To speed up filling process
Which of the following is a claim about the modified flared preparation technique?
It reduces potential apical debris extrusion
It requires no special instruments
It is faster than traditional techniques
It is suitable for all types of canals
What is a disadvantage of the modified flared preparation technique?
It is quicker than other techniques
It is not indicated for calcified roots
It is suitable for all root types
It is less effective in removing debris
What does the crown down pressureless technique focus on?
Avoiding irrigation
Immediate obturation
Not discussed
Using only hand instruments
In the hybrid technique, what is the first step?
Starts coronally with larger instruments
Confirms working length at the end
Uses only one size of instrument
Starts apically with smaller instruments
When should obturation be performed?
When there is visible swelling
When the tooth is sensitive to touch
When the patient reports no symptoms of abnormality
When there is significant pain
What is one of the goals of obturation?
To reduce tooth color
To provide a leak-proof barrier
To increase tooth sensitivity
To enhance bacterial growth
Which property is NOT ideal for obturation materials?
Impermeable to tissue fluids
Easily manipulated
Biologically compatible
Will discolor the tooth
What is gutta percha primarily made from?
Animal by-products
Mineral compounds
Synthetic polymers
Dried juice of the Taban tree
What percentage of gutta percha is typically found in gutta percha material?
15%
4%
60%
20%
What is a common use of zinc oxide eugenol cements in endodontics?
As a filling material
As a canal preparation technique
As an irrigation solution
As a sealer for obturation
What is the melting point range of gutta percha?
30-50°
70-90°
40-60°
50-70°
Which of the following is NOT a component of gutta percha?
Waxes
Radiopacifiers
Calcium hydroxide
Zinc oxide
What is the melting point range of zinc oxide?
50-70°
40-60°
70-90°
30-50°
What percentage of waxes is present in the zinc oxide composition?
2%
6%
5%
4%
Which of the following is a matched GP system?
Thermafil
AH Plus
GIC
ProTaper
What is the role of sealers in dental procedures?
To provide structural support
To fill imperfections beside and between the compacted GP
To act as a disinfectant
To enhance visibility during procedures
Which type of sealer is used with core material?
Type 3
Type 2
Type 4
Type 1
What is a characteristic of AH Plus sealer?
Water-based
Epoxy resin based
Alcohol-based
Oil-based
What is the working time of AH Plus sealer?
4 hours
5 hours
2 hours
3 hours
What is the main disadvantage of lateral condensation technique?
Complexity
High cost
Potential lack of homogeneity of GP mass
Longer procedure time
What is the first step in the lateral condensation process?
Sear off the GP
Accessory points placement
Master point (ISO)
Trial point x-ray
What is the purpose of the spreader in the compaction process?
To measure the canal depth
To remove excess material
To apply sealer
To deform the master GP with pressure
What type of mirrors offers better sharpness and distinctness of the reflected image?
Plastic mirrors
Metal mirrors
Front surface mirrors
Back surface mirrors
What is included in a basic diagnostic kit?
Anesthetic syringes
Front surface mouth mirror
Radiographic films
Surgical instruments
What type of explorer is described in the diagnostic tools?
Double ended instrument
Single ended instrument
Flat ended instrument
Triple ended instrument
What is the purpose of an endodontic explorer?
Measuring tooth length
Locating canals
Conducting vitality tests
Removing caries
What instrument is used to remove caries and coronal pulp tissue?
Pulp vitality tester
Spoon excavator
Tooth slooth
Explorer
How does transillumination help in diagnosis?
Cleans canals
Measures pulp vitality
Locates tiny orifices and hairline fractures
Removes caries
What symptoms are associated with cracked tooth syndrome?
No pain
Erratic pain on mastication
Pain only when biting hard
Constant pain
What is a primary use of pulp vitality testers?
Checking for nerve sensation
Filling cavities
Measuring tooth length
Removing decay
What is the role of magnification in endodontics?
Measures tooth size
Cleans teeth
Helps identify cracks and additional canals
Fills cavities
How many radiographs are typically needed during treatment?
One
A minimum of four
Three
Two
What does the explorer's design facilitate?
Filling cavities
Removing decay
Locating canal orifices
Measuring pulp size
What does a tooth slooth help isolate?
Root canal
Individual cusp of a cracked tooth
Entire tooth
Pulp chamber
What is a pathfinder used for?
Conducting vitality tests
Removing caries
Filling cavities
Exploring canals
What is the main purpose of radiographs in endodontics?
Fill cavities
Evaluate diagnosis and treatment progress
Clean teeth
Measure tooth length
What is the use of transilluminating lights?
Removing decay
Filling cavities
Measuring pulp size
Locating hairline fractures
What does the light in transillumination indicate?
A bright line
A shadow
A dark spot in bright structure
No change in color
What does the cold spray in pulp vitality testers check?
Cavity depth
Nerve sensation
Decay removal
Tooth size
What happens when light is shined on a fractured tooth?
It has no effect
It shows no change
It appears as a dark line
It glows brightly
What is the design feature of an explorer?
Single-ended with a flat end
Curved design
Short and blunt ends
Double-ended with long, tapered ends
What type of light is used in transillumination?
Transilluminating lights
LED lights
Ultraviolet lights
X-ray lights
What should not be done with an explorer?
Use it to locate canals
Do not heat
Use it for cleaning
Use it to condense gutta percha
What is the purpose of using loupes and microscopes in RCT?
To enhance visibility during procedures
To clean instruments
To fill cavities
To measure tooth length
What is the typical design of a spoon excavator?
Curved and flexible
Long-shank instrument
Short and blunt
Double-ended
What is the role of radiographic films in endodontics?
Provide diagnostic information
Clean teeth
Measure pulp size
Fill cavities
What is a common symptom of a hairline fracture?
Vague pain on biting
Sharp pain when biting
Constant pain
No pain at all
What does the explorer help locate in endodontics?
Tooth length
Pulp size
Canal orifices
Cavity depth
What is a major use for electric pulp testers?
Check for nerve sensation
Fill cavities
Measure tooth size
Remove decay
What is the main function of a path finder?
Remove decay
Measure pulp size
Fill cavities
Explore constricted canal spaces
What material are Pathfinder instruments often made of?
Stainless steel
Carbon steel
Aluminum
Nickel titanium
What is the purpose of micro-openers in dentistry?
To shape the canal
To remove pulp tissue
To cut dentine
To enlarge the orifice of the canal
What is a key feature of barbed broaches?
Made from stainless steel
Made from carbon fiber
Made from soft steel wire
Made from nickel titanium
What is the primary use of barbed broaches?
Removal of pulp tissue from wide root canals
Enlarging the canal orifice
Shaping the canal
Filling the canal
What is the main advantage of nickel titanium files?
Excellent flexibility
More cutting efficiency
Less flexibility
Higher strength than stainless steel
What happens when a size 10 file is cut at 1mm?
It becomes size 14
It remains size 10
It becomes size 8
It becomes size 12
What is the typical taper for steel files?
5%
2%
3%
1%
What is the construction method for reamers?
Welded from multiple pieces
Twisted into a spiral from a square or triangular blank
Cut from a solid piece
Milled from a round blank
How does a K file differ from a reamer?
Is made from softer material
Has fewer blades per millimeter
Is less flexible
Has more twists to form a tighter spiral
What is the main action mode of a reamer?
Continuous rotation
Pulling only
Pushing only
90-180 degree turn and withdrawal
What is the risk when using barbed broaches?
High risk of fracture
No risk at all
Minimal if used correctly
Risk of bending
What is the length of dental instruments typically?
10mm, 15mm, 20mm
30mm, 35mm, 40mm
15mm, 20mm, 25mm
21mm, 25mm, 31mm
What is the main disadvantage of nickel titanium files?
Less torsional and rotational strength vs stainless steel files
Higher flexibility
Greater durability
More efficient cutting
What type of flutes does the micro-debrider have?
K-style flutes
Straight flutes
H-file type flutes
Spiral flutes
What is the primary function of spreaders in endodontics?
To enlarge the canal orifice
To facilitate the filling of root canals
To shape the canal
To remove pulp tissue
What is the main characteristic of H files?
Designed for maximum flexibility
Twisted from a single piece
Machined from a steel blank to produce elevated cutting edges
Made from soft steel wire
What is the primary use of the cones formed in dental instruments?
Filing
Reaming
Polishing
Bulk removal of dentine
What is a characteristic of the Unifile compared to an H file?
It has a sharper tip
It is longer
It has two blades in cross-section
It is made of plastic
What is the purpose of spreaders in dental procedures?
To clean the canal
To laterally displace gutta percha
To compact gutta percha
To prepare post space
What is the main function of pluggers in dentistry?
Dentine removal
Lateral condensation
Canal shaping
Vertical compaction of gutta percha
What is the primary use of Gates-Glidden drills?
Compact gutta percha
Prepare post space
Remove dentine
Create straight line access to the canal
What size does a Gates-Glidden drill start at?
0.7mm
1.0mm
0.5mm
0.2mm
What is a potential risk when using Peso-reamers?
Inadequate canal cleaning
Excessive bending
Breaking the instrument
Causing perforations
What is a characteristic of power-assisted root canal instruments?
They are hand-held
They deliver 3000 quarter turn movements per minute
They only work at low speeds
They are less efficient
What is the purpose of the Lentulo spiral in dentistry?
Remove debris
Shape the canal
Compact gutta percha
Introduce paste-like materials into the root canal
What is a feature of nickel titanium rotary instruments?
Made of stainless steel
Super elastic and flexible
Rigid and inflexible
Only for single use
What is the design characteristic of ProTaper instruments?
Fixed diameter
Single use only
Straight design
Variable taper
What is the taper percentage for ProTaper F1 at D1?
5%
7%
9%
8%
What is the maximum speed for ProTaper retreatment files?
350rpm
750rpm
500rpm
1000rpm
What is the tip diameter of ProTaper F3?
0.25mm
0.2mm
0.35mm
0.3mm
What is the primary use of ultrasonic instruments in endodontics?
Scaling teeth
Debridement and preparation of the root canal
Root canal filling
Tooth whitening
What is the apical taper of D1 retreatment file?
7%
10%
8%
9%
What is the purpose of electronic apex locators?
To measure tooth decay
To clean the canal
To locate an apical constriction
To fill the canal
Which type of bur is compatible with straight and contra-angle handpieces?
None of the above
Only latch type
Latch type and friction grip
Only friction grip
What is a disadvantage of thermoplasticised injectable obturation techniques?
Easier to apply
Faster setting time
Less material waste
Difficulty in controlling apical extrusion
What is the gauge of Stropko NiTi Flexi-Tips?
20-gauge
25-gauge
30-gauge
35-gauge
What is the function of locking endodontic pliers with grooves?
To irrigate canals
To securely grip endodontic materials
To cut dental materials
To measure canal length
What do ultrasonic instruments use to function?
Electrical impulses
Sound energy over 20,000 oscillations per second
Magnetic fields
Laser energy
What is the primary benefit of using the 'endo-bender'?
To cut roots
To fill canals
To irrigate effectively
To accurately bend endodontic products
What is the function of the heating devices in endodontics?
For heating and removing GP
For cooling instruments
For sterilizing tools
For mixing materials
What is the primary purpose of the ProTaper instruments?
To clean teeth
Canal shaping
To fill canals
To measure length
What is the taper percentage for ProTaper F2 at D1?
8%
9%
7%
10%
What type of material do ProTaper retreatment files remove?
Amalgam
Gutta percha and obturation material
Cement
Composite
What is a disadvantage of using ultrasonic instruments?
They are too slow
They are too weak
Can cause perforations if not careful
They are too expensive
What is the colour code for ProTaper F4?
Yellow and red
Black and yellow
Red and blue
Green and white
What is the purpose of using a flexible NiTi irrigating needle?
To measure length
To cut tissue
To access any canal
To fill the canal
What is the primary application of MTA in endodontics?
To seal root canals
To shape canals
To clean teeth
To fill cavities
What is the tip design of the burs used in endodontics?
Pointed tip design
Single tip design
Flat tip design
Variable tip design
What is the purpose of Stropko NiTi Flexi-Tips?
To measure root lengths
To fill root canals
To irrigate root canals safely
To extract teeth
What is the working length in endodontics?
Distance from a coronal reference point to the termination point
Length of the root canal only
Length of the tooth
Distance from apex to gum line
What is the minor constrictor in the context of root canals?
The narrowest diameter of the canal
The entrance to the canal
The point of maximum curvature
The widest part of the canal
What percentage of teeth have an eccentrically located apical foramen?
80-90%
30-40%
50-60%
68-80%
What is the CDJ in dentistry?
The pulp chamber
The enamel surface
The root apex
The region where dentin and cementum unite
What is the average distance between the minor and major diameters in younger teeth?
0.3mm
0.524mm
0.659mm
0.5mm
Why is it important to establish working length at the minor constrictor?
To reduce treatment time
To avoid over-instrumentation and infection
To make the canal wider
To fill the canal faster
What is the recommended working length from the apical foramen?
0-0.5mm
0.5-1mm
1-2mm
2-3mm
What is a requirement for measuring working length?
Rapid location of the apical constriction
Measuring only with radiographs
Using only manual methods
Ignoring patient comfort
What does the term 'anatomic apex' refer to?
The tip of the root determined radiographically
The tip of the root determined morphologically
The center of the tooth
The base of the root
What is the main concern when working beyond the minor constrictor?
The canal will become too wide
Infection can be pushed past the apex
The procedure will take longer
The tooth will become brittle
What is a key factor in determining working length using radiographs?
Measuring with a flexible ruler
Obtaining an undistorted image
Using a digital x-ray only
Taking multiple images
What is essential for the Ingles technique procedure?
A high-speed drill
Good, undistorted, preoperative radiographs
A digital camera
A microscope
What should be subtracted as a safety allowance in the Ingles technique?
1.5mm
0.5mm
2mm
At least 1mm
What should you use as a reference point when placing the instrument in the canal?
A definite, repeatable plane of reference to an anatomic landmark
The patient's age
The type of tooth
The length of the canal
What is the purpose of a confirmatory radiograph in the Ingles technique?
To check for decay
To verify the adjusted length
To assess the patient's pain
To measure tooth color
What does the presence of moisture or blood on a paper point indicate?
Shows tooth sensitivity
Estimates the working length
Indicates infection
Confirms tooth decay
In cases of apical resorption, how much should the working length be shortened?
By 1mm
By 2mm
By 1.5mm
Not at all
What classification is based on the type of current flow in electronic apex locators?
Type of tooth
Type of measurement
Type of current flow (AC or DC)
Type of canal
What is the first generation of electronic apex locators called?
Ne
Sono-explorer
Apex-finder
Endo-analyser
What should you do if the working length is long?
Subtract from the length
Use a different tool
Add to the length
Do nothing
What can complicate the identification of the apical constriction?
Canal shape
Radiographic distortion
Tooth color
Patient age
What is the first generation of EAL?
Apex-finder
Sono-explorer
RootZX
Neosono
Which EAL is known as the second generation?
Raypex
Sono-explorer
Justyll
Apex-finder
What is the accuracy percentage of apex locators?
85-90%
90-95%
95-98%
100%
What is a key advantage of using apex locators?
They are always 100% accurate
They eliminate the need for radiographs
They can replace traditional methods
Helpful in placement of the first length-determining files
What is a problem associated with apex locators regarding canal shape?
High accuracy
Always reliable
Easy to use
Lack of patency
What happens when the size of the major foramen is less than 0.2mm?
Measurements become inaccurate
It causes pain
Files cannot be used
Measurements are not affected
What is a common issue with immature apices when using apex locators?
Always provide accurate readings
Do not require any preparation
Make the procedure quicker
Tend to give short measurements electronically
How do current apex locators affect cardiac pacemakers?
Only affect older pacemakers
Always interfere with pacemakers
Do not have an effect on current generation pacemakers
Are banned for use
What principle do frequency dependent apex locators operate on?
Electromagnetic interference
Current flow direction
Constant voltage
Impedance difference between two frequencies
What is the warning sign of early apical exit?
No reaction at all
Immediate healing
Absence of pain
Patient’s reaction to the instrument
What is the importance of establishing an adequate working length?
Increases patient comfort
Allows for faster procedures
Prevents extrusion of debris past the apex
Reduces the need for anesthesia
What can result from an improperly established working length?
Perfect cleaning
Accurate measurements
Ledges, shoulders
No complications
What is a consequence of an improperly established working length that is too short?
Loss of apical constriction
Inadequate cleaning of the canal
Apical perforation
Trauma to the periapical periodontal apparatus
What can happen if the working length is too long?
Inadequate cleaning of the canal
Loss of working length
Apical perforation
Ledges, shoulders
What is one reason for loss of working length during cleaning and shaping?
Instrument separation
Ledge formation
Accumulation of debris
Using a rubber stop
Which apparatus is used to maintain working length with markings?
Rubber stops
Rotary NiTi instruments
Millimetre graded instruments
Stop attachments
What does the smear layer consist of?
Organic and inorganic debris
Pure water
Only organic debris
Only inorganic debris
What does biofilm protect bacteria from?
Oxygen exposure
Temperature fluctuations
Environmental changes and biocides
Nutrient depletion
How thick is the outer surface layer of the smear layer?
5-10 µm thick
2-5 µm thick
1-2 µm thick
10-15 µm thick
What is the first stage of biofilm formation?
Bacteria detach from the surface
Biofilm matures into a complex structure
Bacteria produce extracellular polymeric substances
Free floating bacteria encounter a submerged surface
What is the role of irrigants in root canal treatment?
Remove all bacteria
Shape the canal
Wash away the smear layer
Only disinfect the canal
What happens to the smear layer when fluids are used?
It has no effect
It increases thickness
It becomes more attached
It reduces the amount of debris
What is the primary role of irrigants in root canal treatment?
Seal the root canal
Disinfect the root canal spaces
Fill the root canal
Strengthen the tooth structure
Which of the following is NOT an ideal property of root canal irrigants?
Systematically nontoxic
Should stain the tooth
Noncaustic to periodontal tissues
Broad antimicrobial spectrum
What is the primary antimicrobial agent in sodium hypochlorite?
Ozone
Chlorite ion
Hydrogen peroxide
Hypochlorous acid
Which irrigant is known to dissolve necrotic pulp tissue remnants?
EDTA
Sodium hypochlorite
Normal saline
Chlorhexidine
What is a disadvantage of using sodium hypochlorite?
Removes smear layer
Non-toxic
Unpleasant taste
Effective in all conditions
What is the function of EDTA in root canal treatment?
Kills bacteria
Acts as a lubricant
Removes smear layer
Dissolves necrotic tissue
What concentration range of sodium hypochlorite is commonly used for endodontic irrigation?
5%-10%
0.1%-0.5%
0.5%-5.25%
1%-3%
Which irrigant is a mixture of doxycycline, citric acid, and Tween 80?
Hydrogen peroxide
MTAD
Sodium hypochlorite
Chlorhexidine
What is the effect of high concentrations of sodium hypochlorite on dentin?
Detrimental effect on dentin elasticity
Strengthens dentin
No effect on dentin
Increases dentin flexibility
What is the primary action of irrigants during root canal preparation?
Washing action to remove debris
Strengthening the tooth
Staining the tooth
Filling the canal
What type of infections are common in root canals of non-treated vital teeth?
Viral infections
Polymicrobial infections
Unimicrobial infections
Fungal infections
What should irrigants NOT do to vital periapical tissue?
Aid in recovery
Irritate or damage
Enhance healing
Strengthen tissue
What is the primary disadvantage of sodium hypochlorite in vivo?
High cost
Limited antimicrobial effectiveness
Complex application
Ineffective penetration
Which irrigant is a cationic bisbiguanide?
EDTA
Hydrogen peroxide
Chlorhexidine
Sodium hypochlorite
What is the desired function of irrigant solutions regarding dentin?
Strengthen dentin structure
Fill dentin gaps
Increase dentin hardness
Dissolve inorganic tissue
What effect does sodium hypochlorite have on microbial cells?
Increases resistance
Disrupts vital functions leading to cell death
Has no effect
Enhances growth
What does sodium hypochlorite do in endodontic procedures?
Acts as a lubricant
Removes tissues and kills bugs
Disinfects without removing tissues
Only removes the smear layer
What is the optimal pH range for chlorhexidine's antimicrobial action?
5.5 to 7.0
6.0 to 7.5
4.0 to 5.5
7.0 to 8.5
What is the concentration range of chlorhexidine used in dental treatments?
0.01% to 0.5%
0.5% to 5%
0.002% to 2%
1% to 10%
What types of organisms does chlorhexidine target?
Only gram positive bacteria
Gram positive/negative bacteria, spores, viruses
Only fungal organisms
Only lipophilic viruses
What is a key property of chlorhexidine compared to sodium hypochlorite?
Has a higher irritation rate
Removes tissues
Does not have an unpleasant smell
More effective against gram negative bacteria
How long can chlorhexidine provide antibacterial substantivity?
Up to 12 weeks
Up to 4 weeks
Up to 8 weeks
Up to 6 weeks
What is the effect of dentine components on chlorhexidine's antibacterial activity?
Enhances its activity
May reduce or inhibit its activity
Increases its potency
No effect
What is the primary function of EDTA in root canal treatment?
Enhances bacterial growth
Acts as a disinfectant
Removes the smear layer
Removes tissues
What is the recommended application time for EDTA to effectively remove the smear layer?
1 minute
5 minutes
3 minutes is ideal
10 minutes
What happens when EDTA is mixed with sodium hypochlorite?
Enhances NaOCl activity
Increases NaOCl effectiveness
Reduces the activity of NaOCl
No effect
What is MTAD primarily used for?
As a cement
As a filling material
As an irrigating solution
As a temporary restoration
What type of bacteria does chlorhexidine exhibit greater activity against?
Gram negative bacteria
Viruses
Fungi
Gram positive bacteria
What is the role of ultrasonic devices in endodontics?
Enhances smear layer removal
Acts as a disinfectant
Removes tissues
Increases bacterial growth
What is the mechanism of action of chlorhexidine?
Directly kills all bacteria instantly
Adsorbs to dental tissue and releases gradually
Only works in high concentrations
Increases pH of the environment
What is a common characteristic of all solutions used to remove the smear layer?
Only target inorganic components
Are all cationic agents
They target both organic and inorganic components
Are only effective at high concentrations
What happens when EDTA is mixed with sodium hypochlorite (NaOCl)?
It reduces the amount of chlorine and NaOCl activity.
It increases the effectiveness of NaOCl.
It creates a stable solution.
It enhances the antibacterial properties.
What is the result of mixing hydrogen peroxide with NaOCl for root canal irrigation?
Increases the antibacterial activity.
Enhances the diffusion properties.
Creates a stable solution.
Produces more vigorous bubbling but not more effective than NaOCl alone.
What occurs when chlorhexidine (CHX) is mixed with NaOCl?
They become fully soluble.
They enhance each other's effectiveness.
They form a brown-orange precipitate.
They create a clear solution.
What is a concern regarding the precipitate formed by mixing CHX and NaOCl?
It is used as a medicament.
It enhances the antibacterial activity.
It contains iron and parachloroaniline, which may have mutagenic potential.
It is harmless and dissolves easily.
What is the effect of mixing CHX with EDTA?
Increases the antibacterial efficacy.
Forms a clear solution.
Produces a white bubbly precipitate and reduces EDTA's ability to remove the smear layer.
Enhances the effectiveness of irrigation.
What factors improve syringe needle irrigation efficacy?
Using larger gauge needles.
Keeping the needle tip away from the apex.
Faster irrigant delivery.
Closer proximity to the apex and larger irrigation volume.
What is the primary goal of endodontic treatment?
To fill the root canal with materials.
Elimination of bacteria in the root canal system.
To relieve pain immediately.
To strengthen the tooth structure.
What is the recommended intra-canal medicament to improve bacterial elimination?
Only irrigation is sufficient.
Antibiotics should not be used.
No medicament is needed.
An intra-canal medicament is recommended after instrumentation.
What are the components of Ledermix?
Chlorhexidine and EDTA.
Sodium hypochlorite and hydrogen peroxide.
Calcium hydroxide and zinc oxide.
Demethylchlortetracycline and Triamcinolone.
What is the role of the antibiotic in Ledermix?
Increases inflammation.
Prevents overgrowth of bacteria.
Promotes healing of tissues.
Enhances pain relief.
What effect does Triamcinolone have in Ledermix?
Increases bacterial growth.
Reduces pain and the inflammatory response around the tooth.
Has no effect on inflammation.
Causes allergic reactions.
What is a significant challenge in delivering irrigants in root canals?
The dead-water zone limits effectiveness beyond the tip of the needle.
Needles are too thick.
Irrigants are too viscous.
Needles are too short.
What is the primary component of Odontopaste that provides its pain relief efficacy?
Clindamycin hydrochloride
Zinc oxide
Triamcinolone
Calcium hydroxide
What is a significant disadvantage of using Odontopaste?
No pain relief
Staining of teeth
Better antibacterial efficacy
Dissolves tissue
How long should Odontopaste be left in a tooth for optimal effect after trauma?
1 week
6-8 weeks
1-2 months
2-4 weeks
What is the pH level of calcium hydroxide?
10.8
9.0
12.5
7.0
Which component in calcium hydroxide provides its antibacterial action?
Triamcinolone
Clindamycin
OH- ions
Calcium chloride
What effect does calcium hydroxide have on organic tissue?
Increases its pH
Dissolves it
Strengthens it
Repairs it
What combination can slow the release and diffusion of active components in Ledermix?
Sodium sulphite
Polyethylene glycol
Calcium hydroxide
Zinc oxide
What is the main use of calcium hydroxide in dentistry?
Anesthetic
Intra-canal medicament
Filling material
Crown placement
What is the effect of the steroid component in Odontopaste?
Pain relief
Antibacterial
Tissue dissolution
Staining
What is the pH level that calcium hydroxide can achieve in the inner root dentine?
12.5
11.0
9.0
10.8
What does Odontocide contain that provides anti-inflammatory effects?
Clindamycin
Ibuprofen
Triamcinolone
Calcium hydroxide
What is the minimum time calcium hydroxide should be left to achieve a negative culture?
1 month
4 weeks
1 week
2 days
What is a common use of poly-antibiotic medicaments?
Root canal filling
Pulpotomy
Crown placement
Revascularisation procedures
What is the main reason for the slow release of components when using Ledermix with calcium hydroxide?
It enhances antibacterial action
It enhances the pH
Calcium hydroxide breaks down the steroid
It increases viscosity
What is the effect of the smear layer removal on medicament diffusion?
Reduces pH
Increases permeation
Decreases effectiveness
Has no effect
Which medicament is more common than Ledermix?
Sodium sulphite
Calcium hydroxide
Odontopaste
Zinc oxide
What is the effect of leaving Odontopaste in the crown?
It improves antibacterial effects
It should not be left
It enhances pain relief
It prevents staining
What is the primary antibiotic component in Odontopaste?
Calcium hydroxide
Ibuprofen
Zinc oxide
Clindamycin hydrochloride
What happens to the steroid component of Odontopaste after 6-8 weeks?
Stains teeth
Remains effective
Increases
Almost all gone
What is the composition of Odontocide?
Calcium hydroxide 10% and Ibuprofen 5%
Calcium hydroxide 20% and Ibuprofen 7%
Clindamycin 5% and Triamcinolone 1%
Zinc oxide 15% and Ibuprofen 10%
What is the main disadvantage of calcium hydroxide compared to other medicaments?
It stains teeth
It has a lower pH
It dissolves tissues
Antibacterial efficacy is not as good
What happens to the calcium hydroxide's effectiveness over time?
It increases
It doubles
It remains constant
50% gone in one hour
What is the role of OH- ions in calcium hydroxide?
They increase viscosity
They decrease pH
They dissociate in an aqueous environment
They stain teeth
What is the effect of the combination of calcium hydroxide and Ledermix or Odontopaste?
Always worsens outcomes
Mixed reports on usefulness
Always improves efficacy
No effect on pH
What is the effect of calcium hydroxide on pH in the canal?
Has no effect
Makes it neutral
Elevates canal pH
Lowers canal pH
What is the duration of action for higher concentrations of calcium hydroxide?
Shorter duration of action
Increases tissue damage
Longer duration of action
No effect on duration
What is the primary purpose of using Ledermix?
Pain reduction
Tissue dissolution
Antibacterial action
Staining prevention
What is the effect of trauma on the usage of medicaments?
Increases pain
No effect
Decreases effectiveness
Desire for anti-inflammatory effect
What is the primary function of triethanolamine in dental products?
Pain relief
Antibacterial action
Not specified
Staining prevention
What can occur if the medicament is left too long?
Decreased pH
Staining
Increased effectiveness
Enhanced pain relief
What is a common use of poly-antibiotic medicaments in dentistry?
Revascularisation procedures
Tooth whitening
Root canal sealing
Pain relief
Which antibiotic is NOT listed among poly-antibiotic medicaments?
Minocycline
Ciprofloxacin
Amoxicillin
Metronidazole
What is a major issue with using poly-antibiotic medicaments?
Can cause staining
Always effective
No side effects
Rapid healing
What must be done before revascularisation can occur?
Extract the tooth
Sterilise the root
Fill the canal
Apply calcium hydroxide
What is the role of a blood clot in revascularisation?
Seals the tooth
Acts as a scaffold for new cells
Promotes pain
Prevents infection
What is a limitation of current medicaments?
Works in any pH
Always effective against all bacteria
Less effective against bacteria in biofilms
No need for shaping canals
What is the purpose of occluding dentine tubules with medicaments?
Promotes decay
Whiten teeth
Strengthens teeth
Deprives bacteria of nutrients
Why is it important to always use a medicament for multi-visit treatments?
Bacteria will regrow if the canal is left empty
It speeds up healing
It makes the treatment easier
It reduces costs
What is the recommended pH for E. faecalis survival?
7.0
12.0
9.5
Greater than 11.5
What is a crucial aspect of a good radiograph?
High exposure
Film size
Color contrast
Proper film placement
What does a PA radiograph need to show?
The entire jaw
The apex of the tooth
Only the roots
Only the crown
Which technique is preferred for endodontic radiography?
Bisecting angle technique
Paralleling technique
Freehand technique
Vertical angulation technique
What should the central beam be aligned with in endodontic radiography?
Base of the jaw
Crown of the tooth
Apex of the tooth
Patient's chin
What can film holders and aiming devices help prevent?
Patient's fingers appearing in the radiograph
Film distortion
Overexposure
Underexposure
What can bitewings help identify?
Root fractures
Sinus issues
Jaw alignment
Pulp stones and calcifications
What is a modified paralleling technique used for?
Increase distortion
Enhance color
Decrease the superimposition of the zygomatic process
Simplify the process
What does the radiographic technique provide regarding restorative margins?
Identifies the size and depth of posts
Gives accurate representations of the crown
Indicates the degree of opening
Shows the location / state of restorative margins
What size film should be used for maxillary anteriors?
3 size film
4 size film
2 size film
1 size film
What should align with the incisal edge in maxillary anterior radiography?
The film holder
The film dimple
The patient's lip
The dental chair
What dictates where the film should be placed for maxillary anteriors?
The height of the palate
The size of the tongue
The inclination of the teeth
The width of the arch
What technique can be difficult for mandibular anteriors?
Bitewing technique
Occlusal technique
Paralleling technique
Periapical technique
What should the patient do to facilitate placing the film for mandibular anteriors?
Bite down hard
Tilt their head back
Open wide
Relax and close their mouth slightly
For maxillary posteriors, what should be done for shallow palates?
Use topical LA
Increase exposure time
Use a larger film
Adjust vertical angulation
When taking working films for maxillary posteriors, what should be used?
Longest files
Medium files
20 files
Shortest files
What common issue occurs if roots are obscured by the zygomatic process?
Change the patient position
Use a smaller film
Decrease exposure time
Increase exposure time 50-75%
What is a factor to consider for mandibular posteriors?
Degree of opening
Size of the tongue
Width of the arch
Height of the palate
What should be done if the premolar does not fit on the film in mandibular posteriors?
Rotate the film holder to the mesial
Adjust the x-ray machine
Tilt the patient's head
Use a larger film
What are OPG radiographs used for?
Treatment planning of complex cases
Diagnostic of endodontic disease
Routine check-ups
Identifying caries
What is a major advantage of Cone Beam CT?
Requires less radiation
Is less expensive than traditional radiographs
Provides 3D images
Gives 2D images
What can be manipulated on a PC in Cone Beam CT?
Exposure time
Data to reorientate in true spatial relationships
Film size
Patient position
What is a common application of Cone Beam CT?
Routine dental exams
Implant treatment planning
Cavity detection
Teeth whitening
What does multiplanar reformation provide in Cone Beam CT?
Simplified data
Accurate on curved slices
Less detailed views
Only flat images
What are the advantages of using 3D anatomical features in imaging?
Data manipulated on the PC to reorientate in true spatial relationships
Multiplanar reformation
On screen measurements
Enhancements to the image such as zoom and level adjustments
What is one indication for using imaging in endodontics?
Intra-operative assessment of endodontic treatment complications
Pre-surgical treatment planning
Diagnosis of non-endodontic disease
Diagnosis of periapical disease in patients with contradictory signs and symptoms
Which tool can be used in endodontics for imaging?
Ultrasound device
MRI machine
OPG machine
CT scanner
What does multiplanar reformation provide in imaging?
Cross sections
Accurate on curved slices
3D anatomical features
Zoom adjustments
What is the purpose of serial transplanar reformation?
Diagnosis of periapical disease
Enhancements to the image
Provides cross sections
On screen measurements
What is one complication that can be assessed intra-operatively in endodontics?
Root canal system anomalies
Overfills
Dentoalveolar trauma
Localisation of root resorption
What can imaging help localize in endodontics?
Dentoalveolar trauma
Periapical disease
Root canal system anomalies
External and internal root resorption
What is the benefit of enhancements like zoom in imaging?
Limited spatial relationships
Improved visibility of anatomical features
Reduced image clarity
Increased radiation exposure
What program can be used for imaging in endodontics?
AutoCAD
OsiriX
Photoshop
Microsoft Word
What is an example of a dentoalveolar trauma that imaging can help assess?
Luxation TDIs
Cavities
Gum disease
Tooth whitening
What is the importance of pre-surgical treatment planning in endodontics?
Diagnosis of cavities
Assessment of gum health
Exact location of root apices
General tooth whitening
What does the term 'anatomical features are in 3D' imply in imaging?
Less accurate representations
Simplified imaging process
Increased image size
Enhanced spatial understanding
What does accurate multiplanar reformation affect?
Color adjustments
File formats
Image brightness
Curved slices
In endodontics, what can imaging help diagnose with contradictory signs?
Oral cancer
Gum disease
Cavities
Periapical disease
What is the role of on-screen measurements in imaging?
To reduce image size
To enhance color
To simplify data
To provide accurate dimensions
What is the significance of diagnosing disease with a non-endodontic origin?
To differentiate treatment approaches
To simplify diagnosis
To reduce patient visits
To increase imaging costs
What can be assessed in post-operative imaging?
Brushing technique
Cavity formation
Gum disease
Complications of endodontic treatment
Which anatomical feature is crucial for endodontic treatment planning?
Type of toothpaste
Patient's diet
Proximity of anatomical structures
Color of the tooth
What is the recommended working length if no root or bone resorption is evident according to Weine's recommendations?
2.0 mm from the apical foramen
0.5 mm from the apical foramen
1.5 mm from the apical foramen
1.0 mm from the apical foramen
Which type of apex locator requires a dry environment?
Resistance apex locators
Impedance apex locators
Frequency apex locators
Digital apex locators
What type of constriction is characterized by a tapered shape?
Type D: Parallel constriction
Type B: Tapering constriction
Type A: Traditional single constriction
Type C: Multiconstricted
What is the disadvantage of impedance apex locators?
Cannot estimate beyond 2.0 mm
Difficult to operate
Requires a dry environment
Requires calibration
What does the term 'apical constriction' refer to in dentistry?
The narrowest part of the root canal near the apex
The area of the tooth above the gum line
The entrance of the canal
The widest part of the root canal
Which apex locator operates in a fluid environment and is easy to operate?
Impedance apex locators
Digital apex locators
Resistance apex locators
Frequency apex locators
What is the purpose of using K-type files with apex locators?
To facilitate the measurement of canal length
To seal the canal
To clean the canal
To fill the canal
In Weine's recommendations, if both root and bone resorption are apparent, how much should the working length be shortened?
2.0 mm
1.5 mm
1.0 mm
3.0 mm
What is the main advantage of digital apex locators?
Requires calibration
Cannot estimate beyond 2.0 mm
Requires a dry environment
Digital read-out
What type of apex locator uses 400 KHz?
Neosono-D
Apex Finder
Endocator
Root ZX
What frequency does the Endocator (Hygienic) use?
0.4kHz
SkHz
400 KHz
IKHz
What is the primary principle of first generation resistance type apex locators?
Capacitance measurement
Fluid resistance
Electrical resistance between periodontal membrane and oral mucosa is constant.
Impedance measurements
What is a disadvantage of resistance type apex locators?
No calibration needed
No lip clip required
Operates in fluid environment
Requires a dry environment.
What is the main measurement used by second generation apex locators?
Impedance measurements
Resistance measurements
Fluid resistance
Capacitance measurements
What is a characteristic of the second generation apex locators?
Operates in fluid environment
Digital readout
Uses K-type files
Requires a dry environment
What does impedance consist of?
Voltage and current
Capacitance only
Resistance and capacitance
Resistance only
What is a key advantage of third generation apex locators?
Analog meter
No calibration required
Uses multiple frequencies to determine distance.
Requires a dry environment
What is a disadvantage of second generation apex locators?
Requires calibration
Easy to operate
No patient sensitivity
Digital readout
What happens to the impedance across the length of the root canal?
Remains constant
Varies randomly
Increases apically than coronally
Decreases uniformly
What is the electrical resistance value when the tip of the instrument reaches the foramen in first generation apex locators?
8.0 Kilo Ohms
5.0 Kilo Ohms
7.2 Kilo Ohms
6.5 Kilo Ohms
What is the purpose of using plastic sleeves in apex locators?
To improve electric flow
To reduce patient sensitivity
To avoid contact of file on metal restoration + fluids in canal
To enhance digital readout
What is a contraindication for using resistance type apex locators?
Patients with pacemakers
Patients with RC Prep
Patients without restorations
Patients with dry canals
What does the term 'impedance' refer to in the context of apex locators?
The degree to which an electric circuit resists current flow
The total voltage in the circuit
The length of the root canal
The amount of fluid in the canal
What is the maximum impedance difference in the root canal located?
In the coronal portion
In the middle of the canal
At the canal entrance
At the apical constriction
What do third generation apex locators facilitate?
Low voltage flow
Flow of alternating current
Constant frequency flow
Direct current flow
What is a characteristic of the third generation apex locators?
Uses D-Type files
Uses L-Type files
Uses K-Type files
Uses M-Type files
What is the frequency type used by the fourth generation EAL RootZX?
8 and 0.4 kHz
5 and 10 kHz
0.5 and 4 kHz
1 and 2 kHz
How does the RootZX apex locator determine the distance to the apex?
Compares electrical impedance ratios
Measures only resistance
Calculates only capacitance
Uses a fixed frequency
What is a disadvantage of third generation apex locators?
Can operate without a battery
Must calibrate each canal
Does not require K-Type files
Not sensitive to canal fluid level
What additional function do many modern apex locators have?
Vitality testing functions
Only resistance measurement
Only capacitance measurement
Only length measurement
What is a unique feature of the Elements Diagnostic Unit?
Requires constant calibration
Uses only one frequency
Takes resistance and capacitance measurements
Operates without a power source
What is the accuracy of apex locators in the presence of sodium hypochlorite?
No effect
Less accurate
Only slightly accurate
More accurate
What type of current do third generation apex locators facilitate more for?
Direct current
Constant current
Higher frequencies
Lower frequencies
What do apex locators measure instead of frequency?
Current
Impedance
Voltage
Resistance
What is the principle of the RootZX apex locator based on?
Single frequency measurement
Constant voltage measurement
Electrical impedance ratio between two frequencies
Average frequency measurement
What can modern apex locators detect?
Only pulp vitality
Root perforations
Only canal length
Only canal curvature
What is a common problem associated with apex locators?
Inaccurate in dry canals
Requires no calibration
Inability to measure length
Sensitivity to canal fluid level
What does the term 'comparative impedance' refer to?
Voltage levels
Current flow
Relative magnitudes of impedances
Frequency measurements
What can affect the accuracy of apex locators according to Kovacevic & Tamarut 1998?
Inflammation
Saliva
Blood
Metallic restorations
What should be minimized before accepting apex readings?
Agar gelatine
Alginate
Inflammatory exudate
Saline
What type of alloy does not affect the accuracy of apex locators?
Titanium alloy
Type of alloy used in the file
Gold alloy
Stainless steel
What does NaOCl replace in tissue proteins?
Chlorine in fatty acids
Nitrogen in nucleic acids
Hydrogen in amino groups
Oxygen in carbon chains
What is the primary action of sodium hypochlorite?
Polyprotic acid
Halogen-releasing agent
Organic acid
Quaternary ammonium compound
What is the cutting surface length of the Maillefer Multi-Purpose Bur?
11 mm
9 mm
10 mm
12 mm
What is the total length of the LN Bur?
30 mm
21 mm
28 mm
23 mm
What unique feature does the Endo Access Bur have?
Diamond coating to reduce gouging
Tungsten carbide construction
Long neck design
Crosscut shape
What is the cutting surface length of the Endo-Z Bur?
7 mm
9 mm
8 mm
10 mm
What is the primary purpose of the EndoVac system?
Crown placement
Tooth extraction
Safe and effective irrigation
Root canal filling
What is the concentration range for hydrogen peroxide used as an irrigant?
0.2%-2%
10%-50%
1%-5%
3%-30%
Which irrigant is a bisguanide?
Hydrogen peroxide
Sodium hypochlorite
Citric acid
Chlorhexidine
What is the function of dequalinium acetate?
Organic acid
Bisguanide
Halogen-releasing agent
Quaternary ammonium compound
What compound is used to dissolve inorganic compounds in endodontics?
Citric acid
Chlorhexidine
Hydrogen peroxide
Sodium hypochlorite
What is a common problem with apex locators?
Overheating during use
Inability to detect canals
Inaccurate temperature readings
Short-circuiting by conductors
What is the total length mentioned in the document?
21mm
20mm
22mm
19mm
What is the purpose of the angulation of the bur in maxillary incisors?
To avoid perforation toward the facial aspect
To increase cutting efficiency
To enhance visibility
To reduce access time
What should the angulation of the bur match in mandibular molars?
The incisal edge
The occlusal plane
The lingual tilt of the clinical crown
The facial tilt of the crown
What is used for refining access in the pulp chamber?
Non-end-cutting EndoZ bur
Ultrasonic Endo Tip
End-cutting diamond bur
Gates Glidden Burs
What is a hazard of using larger instruments in canal preparation?
Reduced risk of perforation
Increased flexibility
Better cutting efficiency
Formation of a ledge
What happens when a straight instrument catches on a canal obstruction?
It detaches from the obstruction
It breaks the obstruction
It easily moves up the canal
Turning the instrument drives the point deeper
What is the purpose of the Flex-R files?
To reduce apical transportation
To make the file stiffer
To increase cutting efficiency
To enhance visibility
What is the initial motion for inserting a file into the canal?
Half-turn counterclockwise
Quarter-turn counterclockwise
Full turn clockwise
Quarter-turn clockwise rotation
What is the cutting accomplished by during the use of Flex-R files?
90° counterclockwise rotation
180° clockwise rotation
90° clockwise rotation
120° counterclockwise rotation
What should be adjusted according to the file size during apical pressure application?
The angle of the bur
The amount of apical pressure
The speed of rotation
The length of the file
What is the technique used for access preparation in root canals?
Using only rotary instruments
Using hand files only
Using Flex-R files with clockwise and counterclockwise rotations
Using only ultrasonic tips
What is the first step in the technique for root canal preparation?
Determining working length
Access preparation and gaining straight line access
Irrigating the canal
Preparing the apical control zone
What is the first step in accessing the root canal?
Straight line access
Apical preparation
Gates Glidden drilling
Coronal irrigation
What file size is used to determine the working length in the canal?
15 file
25 file
10 file
40 file
What is the purpose of the power phase when using a file?
To bind the file at the level
To flare the canal
To irrigate the canal
To withdraw debris
How much should files be advanced in size during preparation?
2.0mm increments
3.0mm increments
1.0mm increments
0.5mm increments
What is the master apical file size typically used?
10 file
40 file
25 file
30 file
What technique is used to prepare the apical control zone?
Ultrasonic handpiece
Passive step-back
Balanced force principle
Coronal flaring
What is the purpose of recapitulating between preparations?
To establish working length
To increase file size
To irrigate the canal
To ensure control over tapered shape
What should be done after stepping back with Flex-R files?
Use ultrasonic tools
Irrigate with saline
Use Gates Glidden drills
Repeat with smaller files
Which type of drills are used for coronal flaring?
Rotary files
Flex-R files
Gates Glidden drills
Hand files
What should be confirmed before further apical preparation?
Working length
Canal diameter
File size
Irrigation volume
What is the maximum size for narrow or curved root canals?
15
40
20
25 or #30
What is the initial instrument used for exploring the canals?
Hand file
Fine, curved stainless steel instrument
Rotary file
Gates Glidden drill
What is used to flare the canal orifices?
Rotary files
Ultrasonic handpiece
Hand files
Gates-Glidden drills
What is the irrigation method during the procedure?
Minimal irrigation
Copious irrigation
Intermittent irrigation
No irrigation
What is the technique for establishing apical patency?
Active apical drilling
Passive step-back hand instrumentation
Rotary file insertion
Ultrasonic cleaning
What is the purpose of using a rotary file with a taper of 0.04 or 0.06 mm?
To bind at the apex
To clean the canal
To establish working length
To flare the orifice
What is the first step in canal preparation using rotary files?
Irrigating the canal
Removing pulp
Drilling down the canal with a size no. 1 instrument
Using a size no. 50 file
What is the purpose of using Hedstrom files in canal preparation?
To confirm working length
To remove pulp
To open up the canal to a depth of about 16-18mm
To irrigate the canal
Which files are used to access smaller or calcified canals before using larger Hedstrom files?
8 and #10 K-files
1 and #2 K-files
25 and #30 K-files
15 and #20 K-files
What is the recommended depth for the #2 Gates Glidden bur during canal preparation?
14-16mm
16-18mm
11-13mm
10-12mm
What technique is used to confirm the working length after opening the coronal aspect of the root canal?
Radiographic confirmation
Using a larger file
Irrigation
Manual measurement
What is the purpose of recapitulation in canal preparation?
To ensure thorough irrigation and canal shaping
To remove pulp
To confirm working length
To assess patency
How should the K-files be operated during canal preparation?
Only at the orifice
Tightly against the dentinal wall
Loosely and placed 1mm more apically each time
In a single direction
What is the aim of introducing a small file into the root canal?
To remove pulp
To confirm working length
To allow access of the irrigants into the canal
To shape the canal
Which technique is considered less technique sensitive for coronal third preparation?
Using the largest file to assess the diameter at the junction
Step back technique
Circumferential filing technique
Crown down preparation
What is the final taper established during canal preparation?
Filing to the orifice
Not using irrigation
Using larger files only
Using much less filing in the apical third
What is the function of using the largest file at the junction of the coronal and middle third?
To assess the diameter at the junction
To remove pulp
To confirm working length
To irrigate the canal
What is the recommended approach for crown down preparation?
Use the smallest file first
Skip the assessment step
Use the largest file to assess the diameter at the canal orifice
Only use rotary files
What is the purpose of using progressively smaller files during canal preparation?
To remove pulp only
To confirm working length
To irrigate the canal
To prepare the canal till the middle third of the root
What should be done after the Hedstrom files are used?
Use larger files
Confirm working length
Remove pulp
Irrigate the canal
What is the purpose of using circumferential filing technique?
To confirm working length
To remove pulp
To prepare the canal at the junction of the coronal and middle third
To assess canal diameter
What is the maximum depth for the large diameter file (#80) in the canal?
Approx. 14mm to the cervical third
To the apex
To the orifice
To 10mm
What should be done with each instrument size during canal preparation?
Irrigation and lubrication
Only filing
Only using Hedstrom files
Skipping irrigation
What is the main goal of using sequentially smaller K-files?
To reach the full working length
To confirm working length
To remove pulp
To irrigate the canal
What is the purpose of the step-back technique in canal preparation?
To irrigate the canal
To confirm working length
To prepare the apical third of the canal to the appropriate size
To remove pulp
What is the technique used for coronal third preparation in canal treatment?
Step back technique
Reaming technique
Circumferential filing technique
Rotary technique
Which files are used for hand-operated instruments in canal preparation?
Peeso reamers
Gates-Glidden instruments
Ultrasonic files
K-type and H-type files
What is the purpose of using the largest file at the junction of the coronal and middle third?
To flare the canal
To assess the diameter
To measure the length
To clean the canal
What is the apical third preparation technique mentioned?
Circumferential filing technique
Reaming technique
Conventional step back technique
Rotary technique
What material is mentioned as a component in dental preparations?
Aluminum oxide
Zinc oxide
Copper sulfate
Calcium tungstate
What should be done after each instrument is used?
Sharpen
Replace
Recapitulate
Sterilize
Which group includes hand and finger operated instruments?
Group 2
Group 1
Group 3
Group 4
What is a characteristic of barbed broaches?
Should be used with water
Must fit tightly in the canal
Must fit loosely in the canal
Should be used dry
What does the nominal size designation of files refer to?
Core diameter plus height of the barbs
Color of the file
Material composition
Length of the file
Which instruments are included in Group II?
Ultrasonic instruments
Engine-driven latch type instruments
Barbed broaches
Hand-operated files
What is the function of the Micro-Opener in canal treatment?
To measure the canal length
To fill the canal
To clean the canal
To access and enlarge the canal
What type of instruments are included in Group III?
Engine-driven instruments
Low-speed instruments
Hand-operated instruments
Manual files
Which type of file is designed for use with a dedicated vibratory handpiece?
Peeso reamers
K-type files
Ultrasonic files
Hedstrom files
What is the purpose of using a circumferential filing technique?
To measure the canal
To fill the canal
To prepare and flare the canal
To clean the canal
What type of files are used in Group 1?
K files and H files
Peeso reamers
Gates-Glidden files
Rotary files
What is the maximum diameter of ProTaper files mentioned in the text?
0.90
1.00
0.80
0.70
What is the taper of the GT instruments for sizes 35, 50, and 70?
6
8
12
10
What is the recommended speed for using GT instruments?
300-400 rpm
100-200 rpm
(150-) 350 rpm
200-300 rpm
What type of structure do ProTaper instruments have?
Hexagonal structure
Circular structure
Square structure
Triangular structure
What is the purpose of the irrigation porthole in KiS microsurgical ultrasonic tips?
Cleaning
Guiding
Cutting
Cooling
How should ProTaper instruments be used in the canal?
In a pecking motion
Twisted
Lightly pressed forward
Forcefully pushed
What is the purpose of the convex triangular cross-section of ProTaper files?
Reduces contact area with dentine
Prevents breakage
Enhances flexibility
Increases cutting efficiency
What is the taper of the 04-series of Profile instruments?
0.06
0.08
0.04
0.05
What is the size range for the 06-series of Profile instruments?
20-30
15-45
15-40
10-50
What is the primary material used to prepare the instruments?
Steel wire
Aluminum wire
Nickel-titan wire
Copper wire
What does the GT instrument design help to reduce?
File fatigue
Torsional loads
Cutting efficiency
Risk of ledge formation
How should distorted ProTaper instruments be handled?
Reused
Cleaned
Repaired
Discarded immediately
What technique is recommended for preparation with GT instruments?
Bottom-up technique
Straight-line technique
Crown-down technique
Random technique
What is the size of the shorter orifice shapers in Profile?
15 mm
19 mm
25 mm
30 mm
What is the purpose of using light pressure with GT instruments?
To increase cutting power
To prevent damage
To reduce friction
To speed up the process
What is the cutting efficiency of the ProTaper instruments attributed to?
Material type
Color coding
Balancing the pitch and helical angles
Increased size
What taper does the 04-series include?
0.04
0.05
0.03
0.06
What sizes are included in the 04-series?
15-40
15-45, 60, and 90
15-50
20-45
What taper does the 06-series include?
0.05
0.04
0.07
0.06
What is the length of orifice shapers?
19 mm
20 mm
25 mm
15 mm
What is the structure of Profile instruments made from?
Stainless steel
Round nickel-titan wire
Plastic
Carbon steel
What is the design feature of Profile instruments that reduces ledge formation?
Flat tip
Pointed tip
Bat-tip
Sharp tip
What is the recommended speed for using Profile instruments?
250-300 rpm
200-250 rpm
300-350 rpm
150-200 rpm
What K3 file is recommended for MB2s and calcified canals?
K3 #30/.04
K3 #25/.08
K3 #35/.06
K3 #25/.10
What is the purpose of using Gates Glidden drills before K3 files?
To shape the canal
To increase resistance
To obtain working length
To clean debris
What is the RPM range for K3 files?
350 to 500
250 to 300
400 to 450
300 to 350
What type of tip do K3 files have?
Safe ended cutting tip
Blunt tip
Sharp cutting tip
Pointed tip
What feature increases the peripheral strength behind the cutting blade in K3 files?
Variable core diameter
Increased radial land
Decreased radial land
Positive rake angle
What is the design difference between K3 and Profile regarding radial land?
Smaller radial land for K3
Equal radial land for both
Larger radial land for Profile
Increased radial land for K3
What is the primary material used in thermoplastised obturating materials?
Composites
Thermoplastics
Metals
Ceramics
What does Sybron endo’s extruder help with?
Cleaning debris
Cutting instruments
Shaping canals
Extruding materials
What type of dental tweezers are mentioned?
Straight tweezers
Flat tweezers
Scissors tweezers
Curved locking tweezers
What is the warning associated with the use of flame?
Flame is recommended
Use flame carefully
No flame plus NO FLAN
Flame is prohibited
What is the function of Dovgan MTA carriers?
To hold files
To carry MTA materials
To shape canals
To clean instruments
Flashcards in this deck (547)
-
What is one common cause of pulp death or disease?
Trauma
Extensive caries
Periodontal disease
Deep filling
endodontics causes -
Why is endodontics preferred over tooth extraction?
It is more painful
It is less effective
It is more traumatic
It is much less invasive
endodontics treatment -
What is the main focus of endodontics?
Clean the gums
Eliminate the focus of infection
Extract the tooth
Fill the cavity
endodontics infection -
Which procedure is NOT part of endodontics?
Pulpotomy
Vital pulp therapy
Pulpectomy
Tooth extraction
endodontics procedures -
What is the first step in root canal therapy?
Dental radiograph
Root canal access
Obturation
Pain management
endodontics root_canal -
What is used for pain and anxiety management during root canal therapy?
General anaesthesia
No medication
Only anti-anxiety drugs
Local anaesthesia
endodontics pain_management -
What materials are used for obturation in root canal therapy?
Gutta percha
Amalgam
Composite
Zinc oxide eugenol
endodontics obturation -
What is the purpose of a rubber dam kit in endodontics?
Cleaning the gums
Restoring the tooth
Isolation of the tooth
Filling the cavity
endodontics equipment -
What is the role of sodium hypochlorite in endodontics?
Filling material
Disinfection
Temporary restoration
Anaesthesia
endodontics disinfection -
What is the coronal portion of the pulp cavity called?
Dentin
Pulp chamber
Root canal
Apical foramen
endodontics anatomy -
What is the purpose of using paper points in root canal therapy?
Filling the canal
Accessing the pulp
Drying the root canal
Cleaning the tooth
endodontics technique -
What is a common medicament used in endodontics?
Amalgam
GIC
Calcium hydroxide
Composite
endodontics medicament -
What is the term for the root of the pulp chamber?
Pulp chamber
Root canal
Dentin covering the pulp chamber
Apical foramen
endodontics terminology -
What is the purpose of testing pulp vitality?
To assess the health of the pulp
To clean the tooth
To extract the tooth
To fill the cavity
endodontics diagnosis -
What does pulpotomy involve?
Cleaning the gums
Removing the entire tooth
Filling the root canal
Removing part of the pulp
endodontics procedure -
What is apexification?
A method of extraction
A type of filling
A type of anaesthesia
A procedure to close an open apex
endodontics procedure -
What is the pulp horn?
Opening in the floor of the pulp chamber
Wall of the pulp chamber
Accentuation of the roof of the pulp chamber directly under a cusp or developmental lobe
Canal leading into the root canal
dentistry anatomy -
What does the floor of the pulp chamber consist of?
Dentin bounding the pulp chamber near the cervix of the tooth
Pulp tissue
Enamel covering the tooth surface
Cementum at the root apex
dentistry anatomy -
What are canal orifices?
Walls of the pulp chamber
Root apex
Pulp horns
Openings in the floor of the pulp chamber leading into the root canal
dentistry anatomy -
How are the walls of the pulp chamber named?
From the corresponding walls of the tooth surface
From the pulp tissue
From the root apex
From the type of canal
dentistry anatomy -
What is the apical foramen?
An aperature at or near the apex of a root for vessels and nerves
Wall of the root canal
Opening in the pulp chamber
Surface of the tooth
dentistry anatomy -
What shape is the apical foramen in young teeth?
Triangular
Funnel shaped with the wider portion extending outwards
Square
Circular
dentistry anatomy -
What fills the mouth of the funnel in the apical foramen?
Dental pulp
Periodontal tissue
Dentin
Cementum
dentistry anatomy -
What is the minor diameter in the root canal?
Diameter at the root apex
The narrowest diameter of the canal within the dentin
Diameter at the canal entrance
Widest part of the canal
dentistry anatomy -
What is the average distance between the minor and major diameters in young adults?
0.525mm
0.75mm
0.659mm
1.0mm
dentistry anatomy -
What prognosis is most favorable in endodontic procedures?
When procedures are at the apex
When procedures are more than 2mm away from the minor constrictor
When procedures extend beyond the minor constrictor
When procedures are terminated at the minor constrictor
dentistry prognosis -
What are lateral canals?
Canals leading to the pulp chamber
Openings of accessory canals
Branches off the main root canal
Canals located at approximately right angles to the main root canal
dentistry anatomy -
What are accessory canals?
Canals at the apex
Canals that branch off the main root canal
Canals that run parallel to the main canal
Openings of lateral canals
dentistry anatomy -
What can cause the formation of accessory canals?
Infection in the pulp
Genetic factors
Mild trauma during development of the root apex
Excessive cleaning of the canal
dentistry anatomy -
What happens to accessory canals as the tooth ages?
They become more numerous
Some become obliterated by further dentin and cementum formation
They grow larger
They disappear completely
dentistry anatomy -
What are clinical implications of accessory canals?
They can act as avenues for smear of infection
They have no clinical significance
They are always visible on X-rays
They strengthen the tooth structure
dentistry clinical -
What is vital for a successful coronal access preparation?
Employing sedation techniques
Knowledge of the prior anatomy
Understanding the patient's history
Using the latest technology
dentistry endodontics -
What is the first step in coronal access preparation for endodontics?
Knowledge of the prior anatomy
Knowledge of the external anatomy
Practise skills
Choosing the correct instrument
endodontics preparation -
What imaging technique is recommended for understanding canal location?
Ultrasound imaging
3D imaging
2D X-rays
MRI scans
endodontics imaging -
What is the purpose of applying a rubber dam during endodontic procedures?
To speed up the procedure
To prevent bleeding
To numb the area
To allow for proper visualization
endodontics rubber_dam -
What is included in the armamentarium for endodontic access preparation?
Patient history
Bur diameter and length
Suture material
Anesthesia type
endodontics tools -
What does coronal cavity preparation involve?
Only outline form
Only removal of carious dentin
Outline form, convenience form, removal of carious dentin
Only convenience form
endodontics cavity_preparation -
What is the goal of achieving a straight line access in cavity preparation?
To make the cavity larger
To prevent tooth decay
To remove more dentin
To reach the apical foramen
endodontics access -
What does the outline form of the cavity depend on?
The size and shape of the pulp chamber
The color of the tooth
The type of anesthesia used
The age of the patient
endodontics anatomy -
Why is the removal of carious dentin important in endodontic preparation?
To make the filling process easier
To enhance tooth sensitivity
To improve tooth color
To eliminate bacteria from the tooth interior
endodontics caries_removal -
What is the purpose of the convenience form in cavity preparation?
To allow unobstructed access to the canal orifice
To prevent bleeding
To reduce pain during treatment
To make the cavity look better
endodontics convenience_form -
What must be done before starting radicular preparation?
Fill the cavity
Take another X-ray
Apply anesthesia
Toilet of the cavity
endodontics preparation -
What can influence the size of the outline form in cavity preparation?
The type of rubber dam used
The color of the filling material
The size of the pulp chamber
The patient's age
endodontics outline_form -
What is the primary reason for removing defective restorations in cavity preparation?
To make the cavity larger
To reduce treatment time
To eliminate bacteria and discolored structure
To improve aesthetic appearance
endodontics restorations -
What is the main focus of coronal cavity preparation?
Only removal of caries
Outline form and convenience form
Only outline form
Only convenience form
endodontics cavity_preparation -
What is the risk of not removing all debris from the cavity?
Bacteria-laden saliva may leak into the cavity
The filling material may not adhere
The tooth may become more sensitive
The procedure will take longer
endodontics toilet_cavity -
What factors influence the shape of the pulp chamber?
Age of the dentist
Condition of the patient's gums
Individual root canals and their curvature
Type of filling material
endodontics pulp_chamber -
What is the purpose of cavity expansion during filling techniques?
To reduce the cost of treatment
To make the procedure faster
To accommodate heavier instruments
To improve patient comfort
endodontics filling_techniques -
What should be done if the tooth is calcified or has other complications?
No special consideration needed
Immediate extraction of the tooth
Delayed rubber dam application may be required
Use of stronger anesthesia
endodontics complications -
What must be removed from the chamber before radicular preparation begins?
All caries, debris, and necrotic material
Only caries
Only debris
Only necrotic material
dentistry preparation -
What can happen if calcified debris is left in the chamber?
It will promote healing
It will dissolve
It may obstruct canal enlargement
It will enhance visibility
dentistry obstruction -
What might soft debris carried from the chamber increase?
Visibility
Patient comfort
Dentin strength
Bacterial population in the canal
dentistry bacteria -
What is the average distance from the occlusal surface to the roof of the pulp chamber?
6-8 mm
2-4 mm
4-6 mm
8-10 mm
dentistry measurements -
What should be done if you do not find a pulp chamber where expected?
Ignore the issue
Take a radiograph and get help
Continue removing dentin
Use a larger bur
dentistry guidance -
Which bur is used for tooth colored restorations?
Endo Z bur
Number 2 and 4 diamond burs
Trans metal bur
X-Gates
dentistry burs -
What is the purpose of a safe end carbide bur?
Enhances visibility
Prevents perforation of the pulp chamber floor
Increases cutting speed
Removes more dentin
dentistry safety -
Where is access typically started for posterior teeth?
In the middle of the occlusal surface
Near the gingival margin
At the edge of the tooth
On the buccal surface
dentistry access -
What should be done once the pulp cavity is open?
Seal the cavity immediately
Start filling the cavity
Enlarge the opening to expose all root canal orifices
Apply medication
dentistry access -
What should be verified using a probe?
The size of the cavity
The type of bur used
That the unroofing is complete
The patient's comfort
dentistry verification -
What is the goal when refining the overall outline of the cavity?
To make it narrower
To have a slightly divergent cavity
To have a straight outline
To make it deeper
dentistry refinement -
What should be visible with one direct line of sight after refining the cavity?
Only the main canal
All canal orifices
The outer wall
The pulp chamber only
dentistry visibility -
What is the purpose of using lateral movements when enlarging the opening?
To prevent bleeding
To create a smoother surface
To remove excess dentin
To expose all root canal orifices
dentistry technique -
What type of bur should be used once the pulp is reached?
A round bur
A diamond bur
An end-cutting bur
A non-end-cutting bur
dentistry burs -
How should undercuts and pulp horns be removed?
By scraping with a probe
By using a laser
With a large bur
Using a small round bur in pulling motions
dentistry removal -
What is the average distance to the floor of the pulp chamber?
8-10 mm
4-6 mm
2-4 mm
6-8 mm
dentistry measurements -
What can longer shanked burs help prevent during preparation?
Injury to the patient
Excessive dentin removal
Inaccurate measurements
Obstruction of vision
dentistry visibility -
What should be visible with one direct line of sight in a ly divergent cavity?
Only the mesial wall
Only the central pit
All canal orifices
Only the distal wall
dentistry canals -
Where should you start when accessing mandibular molars?
Apical foramen
Central pit
Distal pit
Mesial wall
dentistry access -
What makes it difficult to predict the tilt or rotation of a tooth under a crown?
Radiographs provide clear images
Actual tilt or rotation is misleading
Light penetration is always sufficient
Crowns are always well-fitted
dentistry crowns -
When should crowns and extra-coronal restorations be removed?
When there is no caries
When the crown is too old
Inadequate margins of the restoration
When the patient requests it
dentistry restorations -
What is a common challenge in accessing teeth with minimal or no clinical crown?
Difficult in older adults with pulpal recession
Always requires rubber dam
Always easy in any age
Only difficult in young patients
dentistry access -
What is the first instrument used in the cleaning and shaping process?
Probe or exploring instrument
Irrigation syringe
Hand file
Rotary instrument
dentistry cleaning -
What is the main goal of biomechanical preparation?
Combine biological and mechanical objectives
Focus only on mechanical objectives
Focus solely on biological objectives
Only prepare the apex
dentistry preparation -
Which objective involves avoiding forcing necrotic debris beyond the foramen?
Mechanical objective
Design objective
Irrigation objective
Biological objective
dentistry objectives -
What is a key aspect of radicular preparation?
Ignoring the apical foramen
Only filling the canal
Thorough debridement of the root canal system
Only shaping the canal
dentistry radicular -
What should the cross-sectional diameter of the root canal preparation do?
Be wider at the apex
Be narrower at every point apically
Be wider at the access
Be uniform throughout
dentistry design -
What is the purpose of creating sufficient space for intra-canal medicaments?
Increase canal diameter
Limit irrigation
Decrease working length
Remove all tissue from the root canal space
dentistry medicaments -
What is the purpose of probing and exploring during root canal treatment?
Limit access to the canal
Magnify tactile sensation
Avoid using instruments
Increase pressure on the tooth
dentistry exploration -
What rule should be used if the pulp chamber is not located after the depth has been reached?
FLIP rule
RULER rule
DIVE rule
SLOB rule
dentistry locating -
What does the term 'chemo-mechanical preparation' refer to?
Involves both mechanical and chemical components
Preparation without instruments
Only mechanical preparation
Only chemical preparation
dentistry chemo-mechanical -
What should be the shape of the root canal preparation?
Be wider at the apex
Be a straight line
Flow with the shape of the original canal
Have no specific shape
dentistry shaping -
What is often difficult to trace at the apex?
Files larger than a 30 ISO file
Files smaller than a 15 ISO file
Files of any size
Only hand files
dentistry tracing -
What is a key feature of the apical foramen during preparation?
It should be removed
It should remain in its original position
It should be repositioned
It should be enlarged
dentistry apical -
What is the ideal histological landmark to terminate endodontic treatment?
Canal orifice
Cavosurface margin
Apical foramen
CDJ
endodontics landmarks -
What should be the approach when determining the working length?
Use only tactile sensation
Use all possible methods and equipment
Use only radiographs
Skip sizes when using instruments
endodontics working_length -
Which instrument should be used cautiously and only when canals are wide enough?
Stainless steel files
Barbed broaches
Reamers
K-files
endodontics instruments -
What is the recommended action when encountering resistance with smaller instruments?
Retreat and bounce back
Change direction immediately
Push harder
Use larger instruments
endodontics techniques -
What is the primary objective of resistance form in root canal therapy?
Achieving maximum filling
Reducing irrigation
Increasing canal size
Prevention of overfilling
endodontics resistance_form -
What is the recommended motion for manipulating hand root canal instruments in a straight canal?
Wiggle back and forth
Pull out quickly
Push straight down
Rotate clockwise continuously
endodontics manipulation -
What should be done after using pre-curved instruments?
Wipe clean and relubricate
Store them without care
Discard them
Use them without cleaning
endodontics instruments -
How should the apical third of the canal be enlarged?
To a size three times larger than the first instrument that binds
To a size smaller than the first instrument
To a random size
To the size of the first instrument
endodontics canal_preparation -
What is the proper technique for reaming in root canal therapy?
Counterclockwise rotation
No rotation
Clockwise rotation of the instrument
Back and forth motion
endodontics techniques -
What is the purpose of meticulous cleaning of cavity walls?
To achieve a glassy-smooth feel
To remove all debris
To prepare for filling
To make the cavity larger
endodontics cavity_preparation -
What should be considered when pre-curving files?
Files should be straight
Curvature is not important
The magnitude of the curvature must be slightly greater than the canal
Only larger files need pre-curving
endodontics precurving -
What is the technique called for using pre-curved instruments?
Straight pull method
Push and pull technique
Watch winding action
Twist and turn method
endodontics techniques -
What is the primary action of endodontic reamers when cutting dentin?
Pushing down to compact
Rotating counterclockwise
Twisting clockwise to engage blades
Pulling out to disengage
endodontics techniques -
Which type of files may use a reaming action effectively?
H-files
Conventional K-files
Steel reamers
Ni-Ti hand files
endodontics files -
What motion is used when filing with Hedstrom or K files?
Rotating motion
Side-to-side motion
Clockwise motion
In and out motion
endodontics filing -
What is a key characteristic of the balanced force technique?
Employs K-type files with non-cutting tips
Requires constant clockwise rotation
Uses only steel reamers
Involves no tips at all
endodontics techniques -
What is the objective of the balanced force technique in endodontics?
Reduce file usage
Increase canal size
Create control over undesirable cutting
Enhance irrigation access
endodontics techniques -
What advantage does the balanced force technique provide in curved canals?
Less canal transportation
Increased risk of ledging
More debris extrusion
Greater file wear
endodontics techniques -
What is a disadvantage of the balanced force technique?
Less need for coronal cleaning
Easier irrigation access
Reduced canal size
Risk of instrument fracture
endodontics techniques -
What is the main premise of standardized preparation in endodontics?
Curved canals are easier
All canals are straight
Most root canals are circular in cross-section
Preparation is not needed
endodontics preparation -
What is a limitation of standardized preparation techniques?
Requires no cleaning
Not commonly practiced anymore
Only for curved canals
Always effective for all canals
endodontics preparation -
What should be done after introducing the smallest reamer in standardized preparation?
Rotate counterclockwise
Withdraw and wipe clean
Leave it in place
Use a larger reamer immediately
endodontics preparation -
What is a potential risk when preparing narrow and curved canals?
Easier cleaning
Transportation during preparations
Increased canal size
Less debris extrusion
endodontics risks -
What is the main goal of creating an apical control zone?
To remove all dentin
To increase canal width
To form a rapid canal taper
To create a straight canal
endodontics techniques -
What is the main objective of step back preparation in endodontics?
Maximize debris extrusion
Minimize irrigation
Create a straight canal
Produce a flared canal suitable for obturation
endodontics preparation -
What is a potential disadvantage of the step back preparation technique?
Better apical control
Increased irrigation effectiveness
Easier canal shaping
Potential extrusion of debris
endodontics disadvantages -
What does the passive step back technique aim to achieve?
Rapid enlargement of the canal
Gradual enlargement of the canal in an apical-coronal direction
Only apical preparation
Coronal access only
endodontics techniques -
Which technique involves enlarging the coronal and middle thirds before apical preparation?
Standardized technique
Passive step back
Double flared technique
Step down or crown down preparation
endodontics preparation -
What is a key advantage of the step down preparation technique?
Reduces tactile awareness
Creates a narrow canal
Increases working length variability
Immediately achieves straight line access
endodontics advantages -
What is a disadvantage of the crown down preparation technique?
Easier to master
Technique requires adapting to different canal shapes
Better apical control
Less effective irrigation
endodontics disadvantages -
What is the purpose of using Hedstrom files in step down preparation?
Prepares the apical third
Removes all pulp immediately
Creates a flared preparation in the coronal half
Increases canal curvature
endodontics techniques -
What is the double flared technique indicated for?
Teeth with necrotic or gangrenous pulps
Teeth with vital pulps
Teeth requiring no treatment
Healthy teeth
endodontics techniques -
What is a common risk associated with narrow canals during preparation?
Reduced canal curvature
Ledge formation
Increased irrigation
Better tactile awareness
endodontics risks -
What is one of the main advantages of the passive step back technique?
Requires more forceful techniques
Reduces risk of procedural accidents
Improves coronal binding
Increases debris extrusion
endodontics advantages -
What is the primary objective of the modified flared preparation technique in endodontics?
To increase canal curvature
To enhance tooth sensitivity
To produce early coronal flaring and reduce apical debris extrusion
To speed up filling process
endodontics technique -
Which of the following is a claim about the modified flared preparation technique?
It reduces potential apical debris extrusion
It requires no special instruments
It is faster than traditional techniques
It is suitable for all types of canals
endodontics technique -
What is a disadvantage of the modified flared preparation technique?
It is quicker than other techniques
It is not indicated for calcified roots
It is suitable for all root types
It is less effective in removing debris
endodontics disadvantages -
What does the crown down pressureless technique focus on?
Avoiding irrigation
Immediate obturation
Not discussed
Using only hand instruments
endodontics technique -
In the hybrid technique, what is the first step?
Starts coronally with larger instruments
Confirms working length at the end
Uses only one size of instrument
Starts apically with smaller instruments
endodontics technique -
When should obturation be performed?
When there is visible swelling
When the tooth is sensitive to touch
When the patient reports no symptoms of abnormality
When there is significant pain
endodontics obturation -
What is one of the goals of obturation?
To reduce tooth color
To provide a leak-proof barrier
To increase tooth sensitivity
To enhance bacterial growth
endodontics obturation -
Which property is NOT ideal for obturation materials?
Impermeable to tissue fluids
Easily manipulated
Biologically compatible
Will discolor the tooth
endodontics materials -
What is gutta percha primarily made from?
Animal by-products
Mineral compounds
Synthetic polymers
Dried juice of the Taban tree
endodontics materials -
What percentage of gutta percha is typically found in gutta percha material?
15%
4%
60%
20%
endodontics materials -
What is a common use of zinc oxide eugenol cements in endodontics?
As a filling material
As a canal preparation technique
As an irrigation solution
As a sealer for obturation
endodontics materials -
What is the melting point range of gutta percha?
30-50°
70-90°
40-60°
50-70°
endodontics materials -
Which of the following is NOT a component of gutta percha?
Waxes
Radiopacifiers
Calcium hydroxide
Zinc oxide
endodontics materials -
What is the melting point range of zinc oxide?
50-70°
40-60°
70-90°
30-50°
zinc_oxide chemistry -
What percentage of waxes is present in the zinc oxide composition?
2%
6%
5%
4%
zinc_oxide composition -
Which of the following is a matched GP system?
Thermafil
AH Plus
GIC
ProTaper
gp_systems dentistry -
What is the role of sealers in dental procedures?
To provide structural support
To fill imperfections beside and between the compacted GP
To act as a disinfectant
To enhance visibility during procedures
sealers dentistry -
Which type of sealer is used with core material?
Type 3
Type 2
Type 4
Type 1
sealers dentistry -
What is a characteristic of AH Plus sealer?
Water-based
Epoxy resin based
Alcohol-based
Oil-based
ah_plus sealers -
What is the working time of AH Plus sealer?
4 hours
5 hours
2 hours
3 hours
ah_plus working_time -
What is the main disadvantage of lateral condensation technique?
Complexity
High cost
Potential lack of homogeneity of GP mass
Longer procedure time
lateral_condensation techniques -
What is the first step in the lateral condensation process?
Sear off the GP
Accessory points placement
Master point (ISO)
Trial point x-ray
lateral_condensation process -
What is the purpose of the spreader in the compaction process?
To measure the canal depth
To remove excess material
To apply sealer
To deform the master GP with pressure
spreader compaction -
What type of mirrors offers better sharpness and distinctness of the reflected image?
Plastic mirrors
Metal mirrors
Front surface mirrors
Back surface mirrors
diagnostic_instruments mirrors -
What is included in a basic diagnostic kit?
Anesthetic syringes
Front surface mouth mirror
Radiographic films
Surgical instruments
diagnostic_instruments kit -
What type of explorer is described in the diagnostic tools?
Double ended instrument
Single ended instrument
Flat ended instrument
Triple ended instrument
explorer diagnostic_tools -
What is the purpose of an endodontic explorer?
Measuring tooth length
Locating canals
Conducting vitality tests
Removing caries
dentistry endodontics -
What instrument is used to remove caries and coronal pulp tissue?
Pulp vitality tester
Spoon excavator
Tooth slooth
Explorer
dentistry instruments -
How does transillumination help in diagnosis?
Cleans canals
Measures pulp vitality
Locates tiny orifices and hairline fractures
Removes caries
diagnosis endodontics -
What symptoms are associated with cracked tooth syndrome?
No pain
Erratic pain on mastication
Pain only when biting hard
Constant pain
dentistry symptoms -
What is a primary use of pulp vitality testers?
Checking for nerve sensation
Filling cavities
Measuring tooth length
Removing decay
dentistry endodontics -
What is the role of magnification in endodontics?
Measures tooth size
Cleans teeth
Helps identify cracks and additional canals
Fills cavities
dentistry endodontics -
How many radiographs are typically needed during treatment?
One
A minimum of four
Three
Two
dentistry radiographs -
What does the explorer's design facilitate?
Filling cavities
Removing decay
Locating canal orifices
Measuring pulp size
dentistry instruments -
What does a tooth slooth help isolate?
Root canal
Individual cusp of a cracked tooth
Entire tooth
Pulp chamber
dentistry instruments -
What is a pathfinder used for?
Conducting vitality tests
Removing caries
Filling cavities
Exploring canals
dentistry instruments -
What is the main purpose of radiographs in endodontics?
Fill cavities
Evaluate diagnosis and treatment progress
Clean teeth
Measure tooth length
dentistry radiographs -
What is the use of transilluminating lights?
Removing decay
Filling cavities
Measuring pulp size
Locating hairline fractures
dentistry diagnosis -
What does the light in transillumination indicate?
A bright line
A shadow
A dark spot in bright structure
No change in color
dentistry diagnosis -
What does the cold spray in pulp vitality testers check?
Cavity depth
Nerve sensation
Decay removal
Tooth size
dentistry endodontics -
What happens when light is shined on a fractured tooth?
It has no effect
It shows no change
It appears as a dark line
It glows brightly
dentistry diagnosis -
What is the design feature of an explorer?
Single-ended with a flat end
Curved design
Short and blunt ends
Double-ended with long, tapered ends
dentistry instruments -
What type of light is used in transillumination?
Transilluminating lights
LED lights
Ultraviolet lights
X-ray lights
dentistry diagnosis -
What should not be done with an explorer?
Use it to locate canals
Do not heat
Use it for cleaning
Use it to condense gutta percha
dentistry instruments -
What is the purpose of using loupes and microscopes in RCT?
To enhance visibility during procedures
To clean instruments
To fill cavities
To measure tooth length
dentistry endodontics -
What is the typical design of a spoon excavator?
Curved and flexible
Long-shank instrument
Short and blunt
Double-ended
dentistry instruments -
What is the role of radiographic films in endodontics?
Provide diagnostic information
Clean teeth
Measure pulp size
Fill cavities
dentistry radiographs -
What is a common symptom of a hairline fracture?
Vague pain on biting
Sharp pain when biting
Constant pain
No pain at all
dentistry symptoms -
What does the explorer help locate in endodontics?
Tooth length
Pulp size
Canal orifices
Cavity depth
dentistry instruments -
What is a major use for electric pulp testers?
Check for nerve sensation
Fill cavities
Measure tooth size
Remove decay
dentistry endodontics -
What is the main function of a path finder?
Remove decay
Measure pulp size
Fill cavities
Explore constricted canal spaces
dentistry instruments -
What material are Pathfinder instruments often made of?
Stainless steel
Carbon steel
Aluminum
Nickel titanium
dentistry instruments -
What is the purpose of micro-openers in dentistry?
To shape the canal
To remove pulp tissue
To cut dentine
To enlarge the orifice of the canal
dentistry micro-openers -
What is a key feature of barbed broaches?
Made from stainless steel
Made from carbon fiber
Made from soft steel wire
Made from nickel titanium
dentistry instruments -
What is the primary use of barbed broaches?
Removal of pulp tissue from wide root canals
Enlarging the canal orifice
Shaping the canal
Filling the canal
dentistry barbed_broaches -
What is the main advantage of nickel titanium files?
Excellent flexibility
More cutting efficiency
Less flexibility
Higher strength than stainless steel
dentistry files -
What happens when a size 10 file is cut at 1mm?
It becomes size 14
It remains size 10
It becomes size 8
It becomes size 12
dentistry files -
What is the typical taper for steel files?
5%
2%
3%
1%
dentistry files -
What is the construction method for reamers?
Welded from multiple pieces
Twisted into a spiral from a square or triangular blank
Cut from a solid piece
Milled from a round blank
dentistry reamers -
How does a K file differ from a reamer?
Is made from softer material
Has fewer blades per millimeter
Is less flexible
Has more twists to form a tighter spiral
dentistry k_files -
What is the main action mode of a reamer?
Continuous rotation
Pulling only
Pushing only
90-180 degree turn and withdrawal
dentistry reamers -
What is the risk when using barbed broaches?
High risk of fracture
No risk at all
Minimal if used correctly
Risk of bending
dentistry barbed_broaches -
What is the length of dental instruments typically?
10mm, 15mm, 20mm
30mm, 35mm, 40mm
15mm, 20mm, 25mm
21mm, 25mm, 31mm
dentistry instruments -
What is the main disadvantage of nickel titanium files?
Less torsional and rotational strength vs stainless steel files
Higher flexibility
Greater durability
More efficient cutting
dentistry files -
What type of flutes does the micro-debrider have?
K-style flutes
Straight flutes
H-file type flutes
Spiral flutes
dentistry micro-debrider -
What is the primary function of spreaders in endodontics?
To enlarge the canal orifice
To facilitate the filling of root canals
To shape the canal
To remove pulp tissue
dentistry spreaders -
What is the main characteristic of H files?
Designed for maximum flexibility
Twisted from a single piece
Machined from a steel blank to produce elevated cutting edges
Made from soft steel wire
dentistry h_files -
What is the primary use of the cones formed in dental instruments?
Filing
Reaming
Polishing
Bulk removal of dentine
dentistry instruments -
What is a characteristic of the Unifile compared to an H file?
It has a sharper tip
It is longer
It has two blades in cross-section
It is made of plastic
dentistry instruments -
What is the purpose of spreaders in dental procedures?
To clean the canal
To laterally displace gutta percha
To compact gutta percha
To prepare post space
dentistry instruments -
What is the main function of pluggers in dentistry?
Dentine removal
Lateral condensation
Canal shaping
Vertical compaction of gutta percha
dentistry instruments -
What is the primary use of Gates-Glidden drills?
Compact gutta percha
Prepare post space
Remove dentine
Create straight line access to the canal
dentistry instruments -
What size does a Gates-Glidden drill start at?
0.7mm
1.0mm
0.5mm
0.2mm
dentistry instruments -
What is a potential risk when using Peso-reamers?
Inadequate canal cleaning
Excessive bending
Breaking the instrument
Causing perforations
dentistry instruments -
What is a characteristic of power-assisted root canal instruments?
They are hand-held
They deliver 3000 quarter turn movements per minute
They only work at low speeds
They are less efficient
dentistry instruments -
What is the purpose of the Lentulo spiral in dentistry?
Remove debris
Shape the canal
Compact gutta percha
Introduce paste-like materials into the root canal
dentistry instruments -
What is a feature of nickel titanium rotary instruments?
Made of stainless steel
Super elastic and flexible
Rigid and inflexible
Only for single use
dentistry instruments -
What is the design characteristic of ProTaper instruments?
Fixed diameter
Single use only
Straight design
Variable taper
dentistry instruments -
What is the taper percentage for ProTaper F1 at D1?
5%
7%
9%
8%
dentistry protaper -
What is the maximum speed for ProTaper retreatment files?
350rpm
750rpm
500rpm
1000rpm
dentistry retreatment -
What is the tip diameter of ProTaper F3?
0.25mm
0.2mm
0.35mm
0.3mm
dentistry protaper -
What is the primary use of ultrasonic instruments in endodontics?
Scaling teeth
Debridement and preparation of the root canal
Root canal filling
Tooth whitening
dentistry ultrasonics -
What is the apical taper of D1 retreatment file?
7%
10%
8%
9%
dentistry retreatment -
What is the purpose of electronic apex locators?
To measure tooth decay
To clean the canal
To locate an apical constriction
To fill the canal
dentistry apex_locator -
Which type of bur is compatible with straight and contra-angle handpieces?
None of the above
Only latch type
Latch type and friction grip
Only friction grip
dentistry burs -
What is a disadvantage of thermoplasticised injectable obturation techniques?
Easier to apply
Faster setting time
Less material waste
Difficulty in controlling apical extrusion
dentistry obturation -
What is the gauge of Stropko NiTi Flexi-Tips?
20-gauge
25-gauge
30-gauge
35-gauge
dentistry irrigation -
What is the function of locking endodontic pliers with grooves?
To irrigate canals
To securely grip endodontic materials
To cut dental materials
To measure canal length
dentistry pliers -
What do ultrasonic instruments use to function?
Electrical impulses
Sound energy over 20,000 oscillations per second
Magnetic fields
Laser energy
dentistry ultrasonics -
What is the primary benefit of using the 'endo-bender'?
To cut roots
To fill canals
To irrigate effectively
To accurately bend endodontic products
dentistry instruments -
What is the function of the heating devices in endodontics?
For heating and removing GP
For cooling instruments
For sterilizing tools
For mixing materials
dentistry heating_devices -
What is the primary purpose of the ProTaper instruments?
To clean teeth
Canal shaping
To fill canals
To measure length
dentistry protaper -
What is the taper percentage for ProTaper F2 at D1?
8%
9%
7%
10%
dentistry protaper -
What type of material do ProTaper retreatment files remove?
Amalgam
Gutta percha and obturation material
Cement
Composite
dentistry retreatment -
What is a disadvantage of using ultrasonic instruments?
They are too slow
They are too weak
Can cause perforations if not careful
They are too expensive
dentistry ultrasonics -
What is the colour code for ProTaper F4?
Yellow and red
Black and yellow
Red and blue
Green and white
dentistry protaper -
What is the purpose of using a flexible NiTi irrigating needle?
To measure length
To cut tissue
To access any canal
To fill the canal
dentistry irrigation -
What is the primary application of MTA in endodontics?
To seal root canals
To shape canals
To clean teeth
To fill cavities
dentistry mta -
What is the tip design of the burs used in endodontics?
Pointed tip design
Single tip design
Flat tip design
Variable tip design
dentistry burs -
What is the purpose of Stropko NiTi Flexi-Tips?
To measure root lengths
To fill root canals
To irrigate root canals safely
To extract teeth
dentistry tools -
What is the working length in endodontics?
Distance from a coronal reference point to the termination point
Length of the root canal only
Length of the tooth
Distance from apex to gum line
dentistry endodontics -
What is the minor constrictor in the context of root canals?
The narrowest diameter of the canal
The entrance to the canal
The point of maximum curvature
The widest part of the canal
dentistry anatomy -
What percentage of teeth have an eccentrically located apical foramen?
80-90%
30-40%
50-60%
68-80%
dentistry statistics -
What is the CDJ in dentistry?
The pulp chamber
The enamel surface
The root apex
The region where dentin and cementum unite
dentistry anatomy -
What is the average distance between the minor and major diameters in younger teeth?
0.3mm
0.524mm
0.659mm
0.5mm
dentistry measurements -
Why is it important to establish working length at the minor constrictor?
To reduce treatment time
To avoid over-instrumentation and infection
To make the canal wider
To fill the canal faster
dentistry endodontics -
What is the recommended working length from the apical foramen?
0-0.5mm
0.5-1mm
1-2mm
2-3mm
dentistry endodontics -
What is a requirement for measuring working length?
Rapid location of the apical constriction
Measuring only with radiographs
Using only manual methods
Ignoring patient comfort
dentistry techniques -
What does the term 'anatomic apex' refer to?
The tip of the root determined radiographically
The tip of the root determined morphologically
The center of the tooth
The base of the root
dentistry definitions -
What is the main concern when working beyond the minor constrictor?
The canal will become too wide
Infection can be pushed past the apex
The procedure will take longer
The tooth will become brittle
dentistry risks -
What is a key factor in determining working length using radiographs?
Measuring with a flexible ruler
Obtaining an undistorted image
Using a digital x-ray only
Taking multiple images
dentistry radiography -
What is essential for the Ingles technique procedure?
A high-speed drill
Good, undistorted, preoperative radiographs
A digital camera
A microscope
endodontics ingles_technique -
What should be subtracted as a safety allowance in the Ingles technique?
1.5mm
0.5mm
2mm
At least 1mm
endodontics ingles_technique -
What should you use as a reference point when placing the instrument in the canal?
A definite, repeatable plane of reference to an anatomic landmark
The patient's age
The type of tooth
The length of the canal
endodontics ingles_technique -
What is the purpose of a confirmatory radiograph in the Ingles technique?
To check for decay
To verify the adjusted length
To assess the patient's pain
To measure tooth color
endodontics ingles_technique -
What does the presence of moisture or blood on a paper point indicate?
Shows tooth sensitivity
Estimates the working length
Indicates infection
Confirms tooth decay
endodontics paper_points -
In cases of apical resorption, how much should the working length be shortened?
By 1mm
By 2mm
By 1.5mm
Not at all
endodontics apical_resorption -
What classification is based on the type of current flow in electronic apex locators?
Type of tooth
Type of measurement
Type of current flow (AC or DC)
Type of canal
endodontics electronic_apex_locators -
What is the first generation of electronic apex locators called?
Ne
Sono-explorer
Apex-finder
Endo-analyser
endodontics electronic_apex_locators -
What should you do if the working length is long?
Subtract from the length
Use a different tool
Add to the length
Do nothing
endodontics ingles_technique -
What can complicate the identification of the apical constriction?
Canal shape
Radiographic distortion
Tooth color
Patient age
endodontics tactile_sensation -
What is the first generation of EAL?
Apex-finder
Sono-explorer
RootZX
Neosono
eal dentistry technology -
Which EAL is known as the second generation?
Raypex
Sono-explorer
Justyll
Apex-finder
eal dentistry technology -
What is the accuracy percentage of apex locators?
85-90%
90-95%
95-98%
100%
eal accuracy dentistry -
What is a key advantage of using apex locators?
They are always 100% accurate
They eliminate the need for radiographs
They can replace traditional methods
Helpful in placement of the first length-determining files
eal advantages dentistry -
What is a problem associated with apex locators regarding canal shape?
High accuracy
Always reliable
Easy to use
Lack of patency
eal problems dentistry -
What happens when the size of the major foramen is less than 0.2mm?
Measurements become inaccurate
It causes pain
Files cannot be used
Measurements are not affected
eal foramen dentistry -
What is a common issue with immature apices when using apex locators?
Always provide accurate readings
Do not require any preparation
Make the procedure quicker
Tend to give short measurements electronically
eal immature_apices dentistry -
How do current apex locators affect cardiac pacemakers?
Only affect older pacemakers
Always interfere with pacemakers
Do not have an effect on current generation pacemakers
Are banned for use
eal pacemakers dentistry -
What principle do frequency dependent apex locators operate on?
Electromagnetic interference
Current flow direction
Constant voltage
Impedance difference between two frequencies
eal principles dentistry -
What is the warning sign of early apical exit?
No reaction at all
Immediate healing
Absence of pain
Patient’s reaction to the instrument
eal warning_signs dentistry -
What is the importance of establishing an adequate working length?
Increases patient comfort
Allows for faster procedures
Prevents extrusion of debris past the apex
Reduces the need for anesthesia
eal working_length dentistry -
What can result from an improperly established working length?
Perfect cleaning
Accurate measurements
Ledges, shoulders
No complications
eal complications dentistry -
What is a consequence of an improperly established working length that is too short?
Loss of apical constriction
Inadequate cleaning of the canal
Apical perforation
Trauma to the periapical periodontal apparatus
dentistry endodontics -
What can happen if the working length is too long?
Inadequate cleaning of the canal
Loss of working length
Apical perforation
Ledges, shoulders
dentistry endodontics -
What is one reason for loss of working length during cleaning and shaping?
Instrument separation
Ledge formation
Accumulation of debris
Using a rubber stop
dentistry endodontics -
Which apparatus is used to maintain working length with markings?
Rubber stops
Rotary NiTi instruments
Millimetre graded instruments
Stop attachments
dentistry endodontics -
What does the smear layer consist of?
Organic and inorganic debris
Pure water
Only organic debris
Only inorganic debris
dentistry endodontics -
What does biofilm protect bacteria from?
Oxygen exposure
Temperature fluctuations
Environmental changes and biocides
Nutrient depletion
dentistry microbiology -
How thick is the outer surface layer of the smear layer?
5-10 µm thick
2-5 µm thick
1-2 µm thick
10-15 µm thick
dentistry endodontics -
What is the first stage of biofilm formation?
Bacteria detach from the surface
Biofilm matures into a complex structure
Bacteria produce extracellular polymeric substances
Free floating bacteria encounter a submerged surface
dentistry microbiology -
What is the role of irrigants in root canal treatment?
Remove all bacteria
Shape the canal
Wash away the smear layer
Only disinfect the canal
dentistry endodontics -
What happens to the smear layer when fluids are used?
It has no effect
It increases thickness
It becomes more attached
It reduces the amount of debris
dentistry endodontics -
What is the primary role of irrigants in root canal treatment?
Seal the root canal
Disinfect the root canal spaces
Fill the root canal
Strengthen the tooth structure
dentistry irrigants -
Which of the following is NOT an ideal property of root canal irrigants?
Systematically nontoxic
Should stain the tooth
Noncaustic to periodontal tissues
Broad antimicrobial spectrum
dentistry irrigants -
What is the primary antimicrobial agent in sodium hypochlorite?
Ozone
Chlorite ion
Hydrogen peroxide
Hypochlorous acid
dentistry sodium_hypochlorite -
Which irrigant is known to dissolve necrotic pulp tissue remnants?
EDTA
Sodium hypochlorite
Normal saline
Chlorhexidine
dentistry irrigants -
What is a disadvantage of using sodium hypochlorite?
Removes smear layer
Non-toxic
Unpleasant taste
Effective in all conditions
dentistry sodium_hypochlorite -
What is the function of EDTA in root canal treatment?
Kills bacteria
Acts as a lubricant
Removes smear layer
Dissolves necrotic tissue
dentistry edta -
What concentration range of sodium hypochlorite is commonly used for endodontic irrigation?
5%-10%
0.1%-0.5%
0.5%-5.25%
1%-3%
dentistry sodium_hypochlorite -
Which irrigant is a mixture of doxycycline, citric acid, and Tween 80?
Hydrogen peroxide
MTAD
Sodium hypochlorite
Chlorhexidine
dentistry mtad -
What is the effect of high concentrations of sodium hypochlorite on dentin?
Detrimental effect on dentin elasticity
Strengthens dentin
No effect on dentin
Increases dentin flexibility
dentistry sodium_hypochlorite -
What is the primary action of irrigants during root canal preparation?
Washing action to remove debris
Strengthening the tooth
Staining the tooth
Filling the canal
dentistry irrigants -
What type of infections are common in root canals of non-treated vital teeth?
Viral infections
Polymicrobial infections
Unimicrobial infections
Fungal infections
dentistry infections -
What should irrigants NOT do to vital periapical tissue?
Aid in recovery
Irritate or damage
Enhance healing
Strengthen tissue
dentistry irrigants -
What is the primary disadvantage of sodium hypochlorite in vivo?
High cost
Limited antimicrobial effectiveness
Complex application
Ineffective penetration
dentistry sodium_hypochlorite -
Which irrigant is a cationic bisbiguanide?
EDTA
Hydrogen peroxide
Chlorhexidine
Sodium hypochlorite
dentistry chlorhexidine -
What is the desired function of irrigant solutions regarding dentin?
Strengthen dentin structure
Fill dentin gaps
Increase dentin hardness
Dissolve inorganic tissue
dentistry irrigants -
What effect does sodium hypochlorite have on microbial cells?
Increases resistance
Disrupts vital functions leading to cell death
Has no effect
Enhances growth
dentistry sodium_hypochlorite -
What does sodium hypochlorite do in endodontic procedures?
Acts as a lubricant
Removes tissues and kills bugs
Disinfects without removing tissues
Only removes the smear layer
endodontics sodium_hypochlorite -
What is the optimal pH range for chlorhexidine's antimicrobial action?
5.5 to 7.0
6.0 to 7.5
4.0 to 5.5
7.0 to 8.5
chlorhexidine ph -
What is the concentration range of chlorhexidine used in dental treatments?
0.01% to 0.5%
0.5% to 5%
0.002% to 2%
1% to 10%
chlorhexidine concentration -
What types of organisms does chlorhexidine target?
Only gram positive bacteria
Gram positive/negative bacteria, spores, viruses
Only fungal organisms
Only lipophilic viruses
antimicrobial spectrum -
What is a key property of chlorhexidine compared to sodium hypochlorite?
Has a higher irritation rate
Removes tissues
Does not have an unpleasant smell
More effective against gram negative bacteria
chlorhexidine sodium_hypochlorite -
How long can chlorhexidine provide antibacterial substantivity?
Up to 12 weeks
Up to 4 weeks
Up to 8 weeks
Up to 6 weeks
substantivity chlorhexidine -
What is the effect of dentine components on chlorhexidine's antibacterial activity?
Enhances its activity
May reduce or inhibit its activity
Increases its potency
No effect
dentine chlorhexidine -
What is the primary function of EDTA in root canal treatment?
Enhances bacterial growth
Acts as a disinfectant
Removes the smear layer
Removes tissues
edta smear_layer -
What is the recommended application time for EDTA to effectively remove the smear layer?
1 minute
5 minutes
3 minutes is ideal
10 minutes
edta application_time -
What happens when EDTA is mixed with sodium hypochlorite?
Enhances NaOCl activity
Increases NaOCl effectiveness
Reduces the activity of NaOCl
No effect
edta sodium_hypochlorite -
What is MTAD primarily used for?
As a cement
As a filling material
As an irrigating solution
As a temporary restoration
mtad irrigating_solution -
What type of bacteria does chlorhexidine exhibit greater activity against?
Gram negative bacteria
Viruses
Fungi
Gram positive bacteria
chlorhexidine activity -
What is the role of ultrasonic devices in endodontics?
Enhances smear layer removal
Acts as a disinfectant
Removes tissues
Increases bacterial growth
ultrasonics endodontics -
What is the mechanism of action of chlorhexidine?
Directly kills all bacteria instantly
Adsorbs to dental tissue and releases gradually
Only works in high concentrations
Increases pH of the environment
mechanism chlorhexidine -
What is a common characteristic of all solutions used to remove the smear layer?
Only target inorganic components
Are all cationic agents
They target both organic and inorganic components
Are only effective at high concentrations
smear_layer irrigants -
What happens when EDTA is mixed with sodium hypochlorite (NaOCl)?
It reduces the amount of chlorine and NaOCl activity.
It increases the effectiveness of NaOCl.
It creates a stable solution.
It enhances the antibacterial properties.
chemistry endodontics -
What is the result of mixing hydrogen peroxide with NaOCl for root canal irrigation?
Increases the antibacterial activity.
Enhances the diffusion properties.
Creates a stable solution.
Produces more vigorous bubbling but not more effective than NaOCl alone.
chemistry endodontics -
What occurs when chlorhexidine (CHX) is mixed with NaOCl?
They become fully soluble.
They enhance each other's effectiveness.
They form a brown-orange precipitate.
They create a clear solution.
chemistry endodontics -
What is a concern regarding the precipitate formed by mixing CHX and NaOCl?
It is used as a medicament.
It enhances the antibacterial activity.
It contains iron and parachloroaniline, which may have mutagenic potential.
It is harmless and dissolves easily.
chemistry endodontics -
What is the effect of mixing CHX with EDTA?
Increases the antibacterial efficacy.
Forms a clear solution.
Produces a white bubbly precipitate and reduces EDTA's ability to remove the smear layer.
Enhances the effectiveness of irrigation.
chemistry endodontics -
What factors improve syringe needle irrigation efficacy?
Using larger gauge needles.
Keeping the needle tip away from the apex.
Faster irrigant delivery.
Closer proximity to the apex and larger irrigation volume.
techniques endodontics -
What is the primary goal of endodontic treatment?
To fill the root canal with materials.
Elimination of bacteria in the root canal system.
To relieve pain immediately.
To strengthen the tooth structure.
endodontics treatment -
What is the recommended intra-canal medicament to improve bacterial elimination?
Only irrigation is sufficient.
Antibiotics should not be used.
No medicament is needed.
An intra-canal medicament is recommended after instrumentation.
endodontics medicaments -
What are the components of Ledermix?
Chlorhexidine and EDTA.
Sodium hypochlorite and hydrogen peroxide.
Calcium hydroxide and zinc oxide.
Demethylchlortetracycline and Triamcinolone.
medicaments endodontics -
What is the role of the antibiotic in Ledermix?
Increases inflammation.
Prevents overgrowth of bacteria.
Promotes healing of tissues.
Enhances pain relief.
medicaments endodontics -
What effect does Triamcinolone have in Ledermix?
Increases bacterial growth.
Reduces pain and the inflammatory response around the tooth.
Has no effect on inflammation.
Causes allergic reactions.
medicaments endodontics -
What is a significant challenge in delivering irrigants in root canals?
The dead-water zone limits effectiveness beyond the tip of the needle.
Needles are too thick.
Irrigants are too viscous.
Needles are too short.
techniques endodontics -
What is the primary component of Odontopaste that provides its pain relief efficacy?
Clindamycin hydrochloride
Zinc oxide
Triamcinolone
Calcium hydroxide
dentistry medicaments -
What is a significant disadvantage of using Odontopaste?
No pain relief
Staining of teeth
Better antibacterial efficacy
Dissolves tissue
dentistry disadvantages -
How long should Odontopaste be left in a tooth for optimal effect after trauma?
1 week
6-8 weeks
1-2 months
2-4 weeks
dentistry usage -
What is the pH level of calcium hydroxide?
10.8
9.0
12.5
7.0
dentistry chemistry -
Which component in calcium hydroxide provides its antibacterial action?
Triamcinolone
Clindamycin
OH- ions
Calcium chloride
dentistry mechanism -
What effect does calcium hydroxide have on organic tissue?
Increases its pH
Dissolves it
Strengthens it
Repairs it
dentistry effects -
What combination can slow the release and diffusion of active components in Ledermix?
Sodium sulphite
Polyethylene glycol
Calcium hydroxide
Zinc oxide
dentistry combinations -
What is the main use of calcium hydroxide in dentistry?
Anesthetic
Intra-canal medicament
Filling material
Crown placement
dentistry usage -
What is the effect of the steroid component in Odontopaste?
Pain relief
Antibacterial
Tissue dissolution
Staining
dentistry effects -
What is the pH level that calcium hydroxide can achieve in the inner root dentine?
12.5
11.0
9.0
10.8
dentistry chemistry -
What does Odontocide contain that provides anti-inflammatory effects?
Clindamycin
Ibuprofen
Triamcinolone
Calcium hydroxide
dentistry medicaments -
What is the minimum time calcium hydroxide should be left to achieve a negative culture?
1 month
4 weeks
1 week
2 days
dentistry timing -
What is a common use of poly-antibiotic medicaments?
Root canal filling
Pulpotomy
Crown placement
Revascularisation procedures
dentistry usage -
What is the main reason for the slow release of components when using Ledermix with calcium hydroxide?
It enhances antibacterial action
It enhances the pH
Calcium hydroxide breaks down the steroid
It increases viscosity
dentistry combinations -
What is the effect of the smear layer removal on medicament diffusion?
Reduces pH
Increases permeation
Decreases effectiveness
Has no effect
dentistry mechanism -
Which medicament is more common than Ledermix?
Sodium sulphite
Calcium hydroxide
Odontopaste
Zinc oxide
dentistry medicaments -
What is the effect of leaving Odontopaste in the crown?
It improves antibacterial effects
It should not be left
It enhances pain relief
It prevents staining
dentistry usage -
What is the primary antibiotic component in Odontopaste?
Calcium hydroxide
Ibuprofen
Zinc oxide
Clindamycin hydrochloride
dentistry medicaments -
What happens to the steroid component of Odontopaste after 6-8 weeks?
Stains teeth
Remains effective
Increases
Almost all gone
dentistry timing -
What is the composition of Odontocide?
Calcium hydroxide 10% and Ibuprofen 5%
Calcium hydroxide 20% and Ibuprofen 7%
Clindamycin 5% and Triamcinolone 1%
Zinc oxide 15% and Ibuprofen 10%
dentistry medicaments -
What is the main disadvantage of calcium hydroxide compared to other medicaments?
It stains teeth
It has a lower pH
It dissolves tissues
Antibacterial efficacy is not as good
dentistry disadvantages -
What happens to the calcium hydroxide's effectiveness over time?
It increases
It doubles
It remains constant
50% gone in one hour
dentistry timing -
What is the role of OH- ions in calcium hydroxide?
They increase viscosity
They decrease pH
They dissociate in an aqueous environment
They stain teeth
dentistry mechanism -
What is the effect of the combination of calcium hydroxide and Ledermix or Odontopaste?
Always worsens outcomes
Mixed reports on usefulness
Always improves efficacy
No effect on pH
dentistry combinations -
What is the effect of calcium hydroxide on pH in the canal?
Has no effect
Makes it neutral
Elevates canal pH
Lowers canal pH
dentistry chemistry -
What is the duration of action for higher concentrations of calcium hydroxide?
Shorter duration of action
Increases tissue damage
Longer duration of action
No effect on duration
dentistry effects -
What is the primary purpose of using Ledermix?
Pain reduction
Tissue dissolution
Antibacterial action
Staining prevention
dentistry usage -
What is the effect of trauma on the usage of medicaments?
Increases pain
No effect
Decreases effectiveness
Desire for anti-inflammatory effect
dentistry usage -
What is the primary function of triethanolamine in dental products?
Pain relief
Antibacterial action
Not specified
Staining prevention
dentistry components -
What can occur if the medicament is left too long?
Decreased pH
Staining
Increased effectiveness
Enhanced pain relief
dentistry disadvantages -
What is a common use of poly-antibiotic medicaments in dentistry?
Revascularisation procedures
Tooth whitening
Root canal sealing
Pain relief
dentistry medicaments -
Which antibiotic is NOT listed among poly-antibiotic medicaments?
Minocycline
Ciprofloxacin
Amoxicillin
Metronidazole
dentistry antibiotics -
What is a major issue with using poly-antibiotic medicaments?
Can cause staining
Always effective
No side effects
Rapid healing
dentistry issues -
What must be done before revascularisation can occur?
Extract the tooth
Sterilise the root
Fill the canal
Apply calcium hydroxide
dentistry revascularisation -
What is the role of a blood clot in revascularisation?
Seals the tooth
Acts as a scaffold for new cells
Promotes pain
Prevents infection
dentistry revascularisation -
What is a limitation of current medicaments?
Works in any pH
Always effective against all bacteria
Less effective against bacteria in biofilms
No need for shaping canals
dentistry limitations -
What is the purpose of occluding dentine tubules with medicaments?
Promotes decay
Whiten teeth
Strengthens teeth
Deprives bacteria of nutrients
dentistry medicaments -
Why is it important to always use a medicament for multi-visit treatments?
Bacteria will regrow if the canal is left empty
It speeds up healing
It makes the treatment easier
It reduces costs
dentistry treatment -
What is the recommended pH for E. faecalis survival?
7.0
12.0
9.5
Greater than 11.5
dentistry bacteria -
What is a crucial aspect of a good radiograph?
High exposure
Film size
Color contrast
Proper film placement
dentistry radiography -
What does a PA radiograph need to show?
The entire jaw
The apex of the tooth
Only the roots
Only the crown
dentistry radiography -
Which technique is preferred for endodontic radiography?
Bisecting angle technique
Paralleling technique
Freehand technique
Vertical angulation technique
dentistry radiography -
What should the central beam be aligned with in endodontic radiography?
Base of the jaw
Crown of the tooth
Apex of the tooth
Patient's chin
dentistry radiography -
What can film holders and aiming devices help prevent?
Patient's fingers appearing in the radiograph
Film distortion
Overexposure
Underexposure
dentistry radiography -
What can bitewings help identify?
Root fractures
Sinus issues
Jaw alignment
Pulp stones and calcifications
dentistry bitewings -
What is a modified paralleling technique used for?
Increase distortion
Enhance color
Decrease the superimposition of the zygomatic process
Simplify the process
dentistry radiography -
What does the radiographic technique provide regarding restorative margins?
Identifies the size and depth of posts
Gives accurate representations of the crown
Indicates the degree of opening
Shows the location / state of restorative margins
radiography restorative -
What size film should be used for maxillary anteriors?
3 size film
4 size film
2 size film
1 size film
radiography maxillary -
What should align with the incisal edge in maxillary anterior radiography?
The film holder
The film dimple
The patient's lip
The dental chair
radiography maxillary -
What dictates where the film should be placed for maxillary anteriors?
The height of the palate
The size of the tongue
The inclination of the teeth
The width of the arch
radiography maxillary -
What technique can be difficult for mandibular anteriors?
Bitewing technique
Occlusal technique
Paralleling technique
Periapical technique
radiography mandibular -
What should the patient do to facilitate placing the film for mandibular anteriors?
Bite down hard
Tilt their head back
Open wide
Relax and close their mouth slightly
patientcare mandibular -
For maxillary posteriors, what should be done for shallow palates?
Use topical LA
Increase exposure time
Use a larger film
Adjust vertical angulation
radiography maxillary -
When taking working films for maxillary posteriors, what should be used?
Longest files
Medium files
20 files
Shortest files
radiography workinglength -
What common issue occurs if roots are obscured by the zygomatic process?
Change the patient position
Use a smaller film
Decrease exposure time
Increase exposure time 50-75%
radiography problems -
What is a factor to consider for mandibular posteriors?
Degree of opening
Size of the tongue
Width of the arch
Height of the palate
radiography mandibular -
What should be done if the premolar does not fit on the film in mandibular posteriors?
Rotate the film holder to the mesial
Adjust the x-ray machine
Tilt the patient's head
Use a larger film
radiography mandibular -
What are OPG radiographs used for?
Treatment planning of complex cases
Diagnostic of endodontic disease
Routine check-ups
Identifying caries
radiography opg -
What is a major advantage of Cone Beam CT?
Requires less radiation
Is less expensive than traditional radiographs
Provides 3D images
Gives 2D images
radiography cbct -
What can be manipulated on a PC in Cone Beam CT?
Exposure time
Data to reorientate in true spatial relationships
Film size
Patient position
radiography cbct -
What is a common application of Cone Beam CT?
Routine dental exams
Implant treatment planning
Cavity detection
Teeth whitening
radiography applications -
What does multiplanar reformation provide in Cone Beam CT?
Simplified data
Accurate on curved slices
Less detailed views
Only flat images
radiography cbct -
What are the advantages of using 3D anatomical features in imaging?
Data manipulated on the PC to reorientate in true spatial relationships
Multiplanar reformation
On screen measurements
Enhancements to the image such as zoom and level adjustments
imaging advantages -
What is one indication for using imaging in endodontics?
Intra-operative assessment of endodontic treatment complications
Pre-surgical treatment planning
Diagnosis of non-endodontic disease
Diagnosis of periapical disease in patients with contradictory signs and symptoms
endodontics indications -
Which tool can be used in endodontics for imaging?
Ultrasound device
MRI machine
OPG machine
CT scanner
endodontics tools -
What does multiplanar reformation provide in imaging?
Cross sections
Accurate on curved slices
3D anatomical features
Zoom adjustments
imaging reformation -
What is the purpose of serial transplanar reformation?
Diagnosis of periapical disease
Enhancements to the image
Provides cross sections
On screen measurements
imaging transplanar -
What is one complication that can be assessed intra-operatively in endodontics?
Root canal system anomalies
Overfills
Dentoalveolar trauma
Localisation of root resorption
endodontics complications -
What can imaging help localize in endodontics?
Dentoalveolar trauma
Periapical disease
Root canal system anomalies
External and internal root resorption
endodontics localization -
What is the benefit of enhancements like zoom in imaging?
Limited spatial relationships
Improved visibility of anatomical features
Reduced image clarity
Increased radiation exposure
imaging enhancements -
What program can be used for imaging in endodontics?
AutoCAD
OsiriX
Photoshop
Microsoft Word
endodontics software -
What is an example of a dentoalveolar trauma that imaging can help assess?
Luxation TDIs
Cavities
Gum disease
Tooth whitening
endodontics trauma -
What is the importance of pre-surgical treatment planning in endodontics?
Diagnosis of cavities
Assessment of gum health
Exact location of root apices
General tooth whitening
endodontics planning -
What does the term 'anatomical features are in 3D' imply in imaging?
Less accurate representations
Simplified imaging process
Increased image size
Enhanced spatial understanding
imaging 3d -
What does accurate multiplanar reformation affect?
Color adjustments
File formats
Image brightness
Curved slices
imaging reformation -
In endodontics, what can imaging help diagnose with contradictory signs?
Oral cancer
Gum disease
Cavities
Periapical disease
endodontics diagnosis -
What is the role of on-screen measurements in imaging?
To reduce image size
To enhance color
To simplify data
To provide accurate dimensions
imaging measurements -
What is the significance of diagnosing disease with a non-endodontic origin?
To differentiate treatment approaches
To simplify diagnosis
To reduce patient visits
To increase imaging costs
endodontics diagnosis -
What can be assessed in post-operative imaging?
Brushing technique
Cavity formation
Gum disease
Complications of endodontic treatment
endodontics post-operative -
Which anatomical feature is crucial for endodontic treatment planning?
Type of toothpaste
Patient's diet
Proximity of anatomical structures
Color of the tooth
endodontics planning -
What is the recommended working length if no root or bone resorption is evident according to Weine's recommendations?
2.0 mm from the apical foramen
0.5 mm from the apical foramen
1.5 mm from the apical foramen
1.0 mm from the apical foramen
dentistry endodontics -
Which type of apex locator requires a dry environment?
Resistance apex locators
Impedance apex locators
Frequency apex locators
Digital apex locators
dentistry apex_locators -
What type of constriction is characterized by a tapered shape?
Type D: Parallel constriction
Type B: Tapering constriction
Type A: Traditional single constriction
Type C: Multiconstricted
dentistry root_canals -
What is the disadvantage of impedance apex locators?
Cannot estimate beyond 2.0 mm
Difficult to operate
Requires a dry environment
Requires calibration
dentistry apex_locators -
What does the term 'apical constriction' refer to in dentistry?
The narrowest part of the root canal near the apex
The area of the tooth above the gum line
The entrance of the canal
The widest part of the root canal
dentistry endodontics -
Which apex locator operates in a fluid environment and is easy to operate?
Impedance apex locators
Digital apex locators
Resistance apex locators
Frequency apex locators
dentistry apex_locators -
What is the purpose of using K-type files with apex locators?
To facilitate the measurement of canal length
To seal the canal
To clean the canal
To fill the canal
dentistry endodontics -
In Weine's recommendations, if both root and bone resorption are apparent, how much should the working length be shortened?
2.0 mm
1.5 mm
1.0 mm
3.0 mm
dentistry endodontics -
What is the main advantage of digital apex locators?
Requires calibration
Cannot estimate beyond 2.0 mm
Requires a dry environment
Digital read-out
dentistry apex_locators -
What type of apex locator uses 400 KHz?
Neosono-D
Apex Finder
Endocator
Root ZX
dentistry apex_locators -
What frequency does the Endocator (Hygienic) use?
0.4kHz
SkHz
400 KHz
IKHz
apex_locator frequency -
What is the primary principle of first generation resistance type apex locators?
Capacitance measurement
Fluid resistance
Electrical resistance between periodontal membrane and oral mucosa is constant.
Impedance measurements
apex_locator first_generation -
What is a disadvantage of resistance type apex locators?
No calibration needed
No lip clip required
Operates in fluid environment
Requires a dry environment.
apex_locator disadvantages -
What is the main measurement used by second generation apex locators?
Impedance measurements
Resistance measurements
Fluid resistance
Capacitance measurements
apex_locator second_generation -
What is a characteristic of the second generation apex locators?
Operates in fluid environment
Digital readout
Uses K-type files
Requires a dry environment
apex_locator second_generation -
What does impedance consist of?
Voltage and current
Capacitance only
Resistance and capacitance
Resistance only
apex_locator impedance -
What is a key advantage of third generation apex locators?
Analog meter
No calibration required
Uses multiple frequencies to determine distance.
Requires a dry environment
apex_locator third_generation -
What is a disadvantage of second generation apex locators?
Requires calibration
Easy to operate
No patient sensitivity
Digital readout
apex_locator disadvantages -
What happens to the impedance across the length of the root canal?
Remains constant
Varies randomly
Increases apically than coronally
Decreases uniformly
apex_locator impedance -
What is the electrical resistance value when the tip of the instrument reaches the foramen in first generation apex locators?
8.0 Kilo Ohms
5.0 Kilo Ohms
7.2 Kilo Ohms
6.5 Kilo Ohms
apex_locator resistance -
What is the purpose of using plastic sleeves in apex locators?
To improve electric flow
To reduce patient sensitivity
To avoid contact of file on metal restoration + fluids in canal
To enhance digital readout
apex_locator safety -
What is a contraindication for using resistance type apex locators?
Patients with pacemakers
Patients with RC Prep
Patients without restorations
Patients with dry canals
apex_locator contraindications -
What does the term 'impedance' refer to in the context of apex locators?
The degree to which an electric circuit resists current flow
The total voltage in the circuit
The length of the root canal
The amount of fluid in the canal
apex_locator impedance -
What is the maximum impedance difference in the root canal located?
In the coronal portion
In the middle of the canal
At the canal entrance
At the apical constriction
dentistry root_canal -
What do third generation apex locators facilitate?
Low voltage flow
Flow of alternating current
Constant frequency flow
Direct current flow
dentistry apex_locators -
What is a characteristic of the third generation apex locators?
Uses D-Type files
Uses L-Type files
Uses K-Type files
Uses M-Type files
dentistry apex_locators -
What is the frequency type used by the fourth generation EAL RootZX?
8 and 0.4 kHz
5 and 10 kHz
0.5 and 4 kHz
1 and 2 kHz
dentistry apex_locators -
How does the RootZX apex locator determine the distance to the apex?
Compares electrical impedance ratios
Measures only resistance
Calculates only capacitance
Uses a fixed frequency
dentistry apex_locators -
What is a disadvantage of third generation apex locators?
Can operate without a battery
Must calibrate each canal
Does not require K-Type files
Not sensitive to canal fluid level
dentistry apex_locators -
What additional function do many modern apex locators have?
Vitality testing functions
Only resistance measurement
Only capacitance measurement
Only length measurement
dentistry apex_locators -
What is a unique feature of the Elements Diagnostic Unit?
Requires constant calibration
Uses only one frequency
Takes resistance and capacitance measurements
Operates without a power source
dentistry apex_locators -
What is the accuracy of apex locators in the presence of sodium hypochlorite?
No effect
Less accurate
Only slightly accurate
More accurate
dentistry apex_locators -
What type of current do third generation apex locators facilitate more for?
Direct current
Constant current
Higher frequencies
Lower frequencies
dentistry apex_locators -
What do apex locators measure instead of frequency?
Current
Impedance
Voltage
Resistance
dentistry apex_locators -
What is the principle of the RootZX apex locator based on?
Single frequency measurement
Constant voltage measurement
Electrical impedance ratio between two frequencies
Average frequency measurement
dentistry apex_locators -
What can modern apex locators detect?
Only pulp vitality
Root perforations
Only canal length
Only canal curvature
dentistry apex_locators -
What is a common problem associated with apex locators?
Inaccurate in dry canals
Requires no calibration
Inability to measure length
Sensitivity to canal fluid level
dentistry apex_locators -
What does the term 'comparative impedance' refer to?
Voltage levels
Current flow
Relative magnitudes of impedances
Frequency measurements
dentistry apex_locators -
What can affect the accuracy of apex locators according to Kovacevic & Tamarut 1998?
Inflammation
Saliva
Blood
Metallic restorations
endodontics apex_locators -
What should be minimized before accepting apex readings?
Agar gelatine
Alginate
Inflammatory exudate
Saline
endodontics apex_locators -
What type of alloy does not affect the accuracy of apex locators?
Titanium alloy
Type of alloy used in the file
Gold alloy
Stainless steel
endodontics apex_locators -
What does NaOCl replace in tissue proteins?
Chlorine in fatty acids
Nitrogen in nucleic acids
Hydrogen in amino groups
Oxygen in carbon chains
endodontics naocl -
What is the primary action of sodium hypochlorite?
Polyprotic acid
Halogen-releasing agent
Organic acid
Quaternary ammonium compound
endodontics sodium_hypochlorite -
What is the cutting surface length of the Maillefer Multi-Purpose Bur?
11 mm
9 mm
10 mm
12 mm
endodontics instruments -
What is the total length of the LN Bur?
30 mm
21 mm
28 mm
23 mm
endodontics instruments -
What unique feature does the Endo Access Bur have?
Diamond coating to reduce gouging
Tungsten carbide construction
Long neck design
Crosscut shape
endodontics instruments -
What is the cutting surface length of the Endo-Z Bur?
7 mm
9 mm
8 mm
10 mm
endodontics instruments -
What is the primary purpose of the EndoVac system?
Crown placement
Tooth extraction
Safe and effective irrigation
Root canal filling
endodontics irrigation -
What is the concentration range for hydrogen peroxide used as an irrigant?
0.2%-2%
10%-50%
1%-5%
3%-30%
endodontics irrigants -
Which irrigant is a bisguanide?
Hydrogen peroxide
Sodium hypochlorite
Citric acid
Chlorhexidine
endodontics irrigants -
What is the function of dequalinium acetate?
Organic acid
Bisguanide
Halogen-releasing agent
Quaternary ammonium compound
endodontics irrigants -
What compound is used to dissolve inorganic compounds in endodontics?
Citric acid
Chlorhexidine
Hydrogen peroxide
Sodium hypochlorite
endodontics irrigants -
What is a common problem with apex locators?
Overheating during use
Inability to detect canals
Inaccurate temperature readings
Short-circuiting by conductors
endodontics apex_locators -
What is the total length mentioned in the document?
21mm
20mm
22mm
19mm
measurement length -
What is the purpose of the angulation of the bur in maxillary incisors?
To avoid perforation toward the facial aspect
To increase cutting efficiency
To enhance visibility
To reduce access time
dentistry technique -
What should the angulation of the bur match in mandibular molars?
The incisal edge
The occlusal plane
The lingual tilt of the clinical crown
The facial tilt of the crown
dentistry technique -
What is used for refining access in the pulp chamber?
Non-end-cutting EndoZ bur
Ultrasonic Endo Tip
End-cutting diamond bur
Gates Glidden Burs
dentistry instruments -
What is a hazard of using larger instruments in canal preparation?
Reduced risk of perforation
Increased flexibility
Better cutting efficiency
Formation of a ledge
dentistry hazards -
What happens when a straight instrument catches on a canal obstruction?
It detaches from the obstruction
It breaks the obstruction
It easily moves up the canal
Turning the instrument drives the point deeper
dentistry technique -
What is the purpose of the Flex-R files?
To reduce apical transportation
To make the file stiffer
To increase cutting efficiency
To enhance visibility
dentistry instruments -
What is the initial motion for inserting a file into the canal?
Half-turn counterclockwise
Quarter-turn counterclockwise
Full turn clockwise
Quarter-turn clockwise rotation
dentistry technique -
What is the cutting accomplished by during the use of Flex-R files?
90° counterclockwise rotation
180° clockwise rotation
90° clockwise rotation
120° counterclockwise rotation
dentistry technique -
What should be adjusted according to the file size during apical pressure application?
The angle of the bur
The amount of apical pressure
The speed of rotation
The length of the file
dentistry technique -
What is the technique used for access preparation in root canals?
Using only rotary instruments
Using hand files only
Using Flex-R files with clockwise and counterclockwise rotations
Using only ultrasonic tips
dentistry technique -
What is the first step in the technique for root canal preparation?
Determining working length
Access preparation and gaining straight line access
Irrigating the canal
Preparing the apical control zone
dentistry technique -
What is the first step in accessing the root canal?
Straight line access
Apical preparation
Gates Glidden drilling
Coronal irrigation
endodontics procedure -
What file size is used to determine the working length in the canal?
15 file
25 file
10 file
40 file
endodontics files -
What is the purpose of the power phase when using a file?
To bind the file at the level
To flare the canal
To irrigate the canal
To withdraw debris
endodontics technique -
How much should files be advanced in size during preparation?
2.0mm increments
3.0mm increments
1.0mm increments
0.5mm increments
endodontics files -
What is the master apical file size typically used?
10 file
40 file
25 file
30 file
endodontics files -
What technique is used to prepare the apical control zone?
Ultrasonic handpiece
Passive step-back
Balanced force principle
Coronal flaring
endodontics technique -
What is the purpose of recapitulating between preparations?
To establish working length
To increase file size
To irrigate the canal
To ensure control over tapered shape
endodontics technique -
What should be done after stepping back with Flex-R files?
Use ultrasonic tools
Irrigate with saline
Use Gates Glidden drills
Repeat with smaller files
endodontics drills -
Which type of drills are used for coronal flaring?
Rotary files
Flex-R files
Gates Glidden drills
Hand files
endodontics drills -
What should be confirmed before further apical preparation?
Working length
Canal diameter
File size
Irrigation volume
endodontics procedure -
What is the maximum size for narrow or curved root canals?
15
40
20
25 or #30
endodontics files -
What is the initial instrument used for exploring the canals?
Hand file
Fine, curved stainless steel instrument
Rotary file
Gates Glidden drill
endodontics exploration -
What is used to flare the canal orifices?
Rotary files
Ultrasonic handpiece
Hand files
Gates-Glidden drills
endodontics drills -
What is the irrigation method during the procedure?
Minimal irrigation
Copious irrigation
Intermittent irrigation
No irrigation
endodontics irrigation -
What is the technique for establishing apical patency?
Active apical drilling
Passive step-back hand instrumentation
Rotary file insertion
Ultrasonic cleaning
endodontics technique -
What is the purpose of using a rotary file with a taper of 0.04 or 0.06 mm?
To bind at the apex
To clean the canal
To establish working length
To flare the orifice
endodontics files -
What is the first step in canal preparation using rotary files?
Irrigating the canal
Removing pulp
Drilling down the canal with a size no. 1 instrument
Using a size no. 50 file
endodontics canal_preparation -
What is the purpose of using Hedstrom files in canal preparation?
To confirm working length
To remove pulp
To open up the canal to a depth of about 16-18mm
To irrigate the canal
endodontics hedstrom_files -
Which files are used to access smaller or calcified canals before using larger Hedstrom files?
8 and #10 K-files
1 and #2 K-files
25 and #30 K-files
15 and #20 K-files
endodontics canal_access -
What is the recommended depth for the #2 Gates Glidden bur during canal preparation?
14-16mm
16-18mm
11-13mm
10-12mm
endodontics gates_glidden -
What technique is used to confirm the working length after opening the coronal aspect of the root canal?
Radiographic confirmation
Using a larger file
Irrigation
Manual measurement
endodontics working_length -
What is the purpose of recapitulation in canal preparation?
To ensure thorough irrigation and canal shaping
To remove pulp
To confirm working length
To assess patency
endodontics recapitulation -
How should the K-files be operated during canal preparation?
Only at the orifice
Tightly against the dentinal wall
Loosely and placed 1mm more apically each time
In a single direction
endodontics k-files -
What is the aim of introducing a small file into the root canal?
To remove pulp
To confirm working length
To allow access of the irrigants into the canal
To shape the canal
endodontics irrigation -
Which technique is considered less technique sensitive for coronal third preparation?
Using the largest file to assess the diameter at the junction
Step back technique
Circumferential filing technique
Crown down preparation
endodontics preparation_techniques -
What is the final taper established during canal preparation?
Filing to the orifice
Not using irrigation
Using larger files only
Using much less filing in the apical third
endodontics final_taper -
What is the function of using the largest file at the junction of the coronal and middle third?
To assess the diameter at the junction
To remove pulp
To confirm working length
To irrigate the canal
endodontics canal_diameter -
What is the recommended approach for crown down preparation?
Use the smallest file first
Skip the assessment step
Use the largest file to assess the diameter at the canal orifice
Only use rotary files
endodontics crown_down_preparation -
What is the purpose of using progressively smaller files during canal preparation?
To remove pulp only
To confirm working length
To irrigate the canal
To prepare the canal till the middle third of the root
endodontics file_progression -
What should be done after the Hedstrom files are used?
Use larger files
Confirm working length
Remove pulp
Irrigate the canal
endodontics canal_irrigation -
What is the purpose of using circumferential filing technique?
To confirm working length
To remove pulp
To prepare the canal at the junction of the coronal and middle third
To assess canal diameter
endodontics filing_technique -
What is the maximum depth for the large diameter file (#80) in the canal?
Approx. 14mm to the cervical third
To the apex
To the orifice
To 10mm
endodontics file_depth -
What should be done with each instrument size during canal preparation?
Irrigation and lubrication
Only filing
Only using Hedstrom files
Skipping irrigation
endodontics instrumentation -
What is the main goal of using sequentially smaller K-files?
To reach the full working length
To confirm working length
To remove pulp
To irrigate the canal
endodontics k-files -
What is the purpose of the step-back technique in canal preparation?
To irrigate the canal
To confirm working length
To prepare the apical third of the canal to the appropriate size
To remove pulp
endodontics step-back_technique -
What is the technique used for coronal third preparation in canal treatment?
Step back technique
Reaming technique
Circumferential filing technique
Rotary technique
dentistry canal_preparation -
Which files are used for hand-operated instruments in canal preparation?
Peeso reamers
Gates-Glidden instruments
Ultrasonic files
K-type and H-type files
dentistry instruments -
What is the purpose of using the largest file at the junction of the coronal and middle third?
To flare the canal
To assess the diameter
To measure the length
To clean the canal
dentistry canal_preparation -
What is the apical third preparation technique mentioned?
Circumferential filing technique
Reaming technique
Conventional step back technique
Rotary technique
dentistry apical_preparation -
What material is mentioned as a component in dental preparations?
Aluminum oxide
Zinc oxide
Copper sulfate
Calcium tungstate
dentistry materials -
What should be done after each instrument is used?
Sharpen
Replace
Recapitulate
Sterilize
dentistry procedure -
Which group includes hand and finger operated instruments?
Group 2
Group 1
Group 3
Group 4
dentistry instruments -
What is a characteristic of barbed broaches?
Should be used with water
Must fit tightly in the canal
Must fit loosely in the canal
Should be used dry
dentistry instruments -
What does the nominal size designation of files refer to?
Core diameter plus height of the barbs
Color of the file
Material composition
Length of the file
dentistry file_designation -
Which instruments are included in Group II?
Ultrasonic instruments
Engine-driven latch type instruments
Barbed broaches
Hand-operated files
dentistry instruments -
What is the function of the Micro-Opener in canal treatment?
To measure the canal length
To fill the canal
To clean the canal
To access and enlarge the canal
dentistry instruments -
What type of instruments are included in Group III?
Engine-driven instruments
Low-speed instruments
Hand-operated instruments
Manual files
dentistry instruments -
Which type of file is designed for use with a dedicated vibratory handpiece?
Peeso reamers
K-type files
Ultrasonic files
Hedstrom files
dentistry instruments -
What is the purpose of using a circumferential filing technique?
To measure the canal
To fill the canal
To prepare and flare the canal
To clean the canal
dentistry technique -
What type of files are used in Group 1?
K files and H files
Peeso reamers
Gates-Glidden files
Rotary files
dentistry instruments -
What is the maximum diameter of ProTaper files mentioned in the text?
0.90
1.00
0.80
0.70
dentistry instruments -
What is the taper of the GT instruments for sizes 35, 50, and 70?
6
8
12
10
dentistry instruments -
What is the recommended speed for using GT instruments?
300-400 rpm
100-200 rpm
(150-) 350 rpm
200-300 rpm
dentistry instruments -
What type of structure do ProTaper instruments have?
Hexagonal structure
Circular structure
Square structure
Triangular structure
dentistry instruments -
What is the purpose of the irrigation porthole in KiS microsurgical ultrasonic tips?
Cleaning
Guiding
Cutting
Cooling
dentistry instruments -
How should ProTaper instruments be used in the canal?
In a pecking motion
Twisted
Lightly pressed forward
Forcefully pushed
dentistry instruments -
What is the purpose of the convex triangular cross-section of ProTaper files?
Reduces contact area with dentine
Prevents breakage
Enhances flexibility
Increases cutting efficiency
dentistry instruments -
What is the taper of the 04-series of Profile instruments?
0.06
0.08
0.04
0.05
dentistry instruments -
What is the size range for the 06-series of Profile instruments?
20-30
15-45
15-40
10-50
dentistry instruments -
What is the primary material used to prepare the instruments?
Steel wire
Aluminum wire
Nickel-titan wire
Copper wire
dentistry materials -
What does the GT instrument design help to reduce?
File fatigue
Torsional loads
Cutting efficiency
Risk of ledge formation
dentistry instruments -
How should distorted ProTaper instruments be handled?
Reused
Cleaned
Repaired
Discarded immediately
dentistry instruments -
What technique is recommended for preparation with GT instruments?
Bottom-up technique
Straight-line technique
Crown-down technique
Random technique
dentistry techniques -
What is the size of the shorter orifice shapers in Profile?
15 mm
19 mm
25 mm
30 mm
dentistry instruments -
What is the purpose of using light pressure with GT instruments?
To increase cutting power
To prevent damage
To reduce friction
To speed up the process
dentistry instruments -
What is the cutting efficiency of the ProTaper instruments attributed to?
Material type
Color coding
Balancing the pitch and helical angles
Increased size
dentistry instruments -
What taper does the 04-series include?
0.04
0.05
0.03
0.06
dentistry instruments -
What sizes are included in the 04-series?
15-40
15-45, 60, and 90
15-50
20-45
dentistry instruments -
What taper does the 06-series include?
0.05
0.04
0.07
0.06
dentistry instruments -
What is the length of orifice shapers?
19 mm
20 mm
25 mm
15 mm
dentistry instruments -
What is the structure of Profile instruments made from?
Stainless steel
Round nickel-titan wire
Plastic
Carbon steel
dentistry instruments -
What is the design feature of Profile instruments that reduces ledge formation?
Flat tip
Pointed tip
Bat-tip
Sharp tip
dentistry instruments -
What is the recommended speed for using Profile instruments?
250-300 rpm
200-250 rpm
300-350 rpm
150-200 rpm
dentistry instruments -
What K3 file is recommended for MB2s and calcified canals?
K3 #30/.04
K3 #25/.08
K3 #35/.06
K3 #25/.10
dentistry instruments -
What is the purpose of using Gates Glidden drills before K3 files?
To shape the canal
To increase resistance
To obtain working length
To clean debris
dentistry instruments -
What is the RPM range for K3 files?
350 to 500
250 to 300
400 to 450
300 to 350
dentistry instruments -
What type of tip do K3 files have?
Safe ended cutting tip
Blunt tip
Sharp cutting tip
Pointed tip
dentistry instruments -
What feature increases the peripheral strength behind the cutting blade in K3 files?
Variable core diameter
Increased radial land
Decreased radial land
Positive rake angle
dentistry instruments -
What is the design difference between K3 and Profile regarding radial land?
Smaller radial land for K3
Equal radial land for both
Larger radial land for Profile
Increased radial land for K3
dentistry instruments -
What is the primary material used in thermoplastised obturating materials?
Composites
Thermoplastics
Metals
Ceramics
dentistry materials -
What does Sybron endo’s extruder help with?
Cleaning debris
Cutting instruments
Shaping canals
Extruding materials
dentistry instruments -
What type of dental tweezers are mentioned?
Straight tweezers
Flat tweezers
Scissors tweezers
Curved locking tweezers
dentistry tools -
What is the warning associated with the use of flame?
Flame is recommended
Use flame carefully
No flame plus NO FLAN
Flame is prohibited
safety dentistry -
What is the function of Dovgan MTA carriers?
To hold files
To carry MTA materials
To shape canals
To clean instruments
dentistry materials -
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