DENT-220-01 OPERATIVE DENTISTRY

Question 1

Which diamond bur has diamond particle grit size of 125–150 micrometer?

• medium
• super coarse
• fine
• coarse

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Question 2

Which rubber dam clamp is used for partially erupted or irregularly shaped molars?

• 14A
• 2A
• 12A
• 13A

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Question 3

Which dam frame is placed under the dam?

• ostby frame
• plastic U-shaped frame
• young frame
• picture frame

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Question 4

When can heat be generated while using a rotary instrument that can cause tooth damage?

• insufficient coolant
• increased pressure when cutting
• using a bur that is no longer straight
• using a dull bur

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Question 5

Dental amalgam can be finished and polished as soon as it sets.

• True
• False

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Question 6

Which of the following satisfies convenience form?

• convergent buccal and lingual walls
• no unsupported enamel exists
• smallest condenser fits everywhere in the preparation
• isthmus width does not exceed maximum

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Question 7

Which of the following is classified as G.V. Black Class I?

• lingual surfaces of maxillary incisors
• proximal surfaces of premolars and molars
• occlusal two thirds of the facial and lingual surfaces of molars
• occlusal surfaces of premolars and molars

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Question 8

The wider jaw of the 12A and 13A clamps should always be on the buccal side of the premolar.

• True
• False

Question 9

What does the second number describes on a 3 number formula for hand instruments?

• angle the blade forms with the long axis of the handle
• angle formed between the cutting edge and central axis of the shaft
• width of the blade
• length of the blade

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Question 10

What should be checked after placing a restoration?

• no contacts on the margin between the restoration and sound tooth structure
• contacts are the same prior to preparation and after restoration
• there should be fewer contacts on adjacent teeth after placing the restoration compared to before doing the preparation
• no bullseye marks on the restoration

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Question 11

What should be done if after a Class I preparation, the thickness of the remaining marginal ridge is less than 1 mm?

• the pulpal floor should be deeper at 4 mm
• the preparation doesn’t need any modification as long as it will be restored with amalgam
• the preparation must be extended to pass through the marginal ridge making it a Class II preparation
• the tooth must be restored with composite

Question 11

What should be done if after a Class I preparation, the thickness of the remaining marginal ridge is less than 1 mm?

• the pulpal floor should be deeper at 4 mm
• the preparation doesn’t need any modification as long as it will be restored with amalgam
• the preparation must be extended to pass through the marginal ridge making it a Class II preparation
• the tooth must be restored with composite

Question 12

What are triangular absorbent pads used to isolate posterior areas in the maxillary and mandibular arches?

• dry angles
• garmers
• retraction cords
• cotton rolls

Question 13

Which hand instrument is used for beveling gingival cavosurface margins, rounding axiopulpal line angles and refining retentive grooves?

• cleoid-discoid
• chisel
• gingival margin trimmers
• wedelstaedt

Question 14

What can be used to smoothen a bumpy pulpal floor?

• largest round bur that will fit the preparation on low speed handpiece going back and forth on stall speed
• smallest round bur on low speed handpiece going back and forth on stall speed
• smallest round bur on high speed going back and forth on full speed
• hand instruments

Question 15

Which component in modern amalgam almost eliminate Gamma 2 phase resulting in a stronger and more corrosion resistant set?

• Copper
• Tin
• Silver
• Zinc

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Question 16

Which risk factor will always classify an individual as high caries risk?

• hypo-salivation/gross indicators of dry mouth
• appliances, restorations and other causes of increase biofilm retention
• thick plaque
• exposed root surface

Question 36

What is the minimum rotational speed a dental handpiece can operate while still maintaining enough torque to cut or remove material effectively?

• stall speed
• low speed
• need for speed
• full speed

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Question 37

Occlusion doesn’t need to be checked when removing key occlusal contacts.

• True
• False

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Question 38

What stage of caries lesion has the enamel showing localized breakdown (cavitation) without visible dentin exposure?

• ICDAS Code 1
• ICDAS Code 2
• ICDAS Code 3
• ICDAS Code 4
• ICDAS Code 5
• ICDAS Code 6

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Question 39

Which type of clamp works better on a partially erupted maxillary second molar?

• apically positioned jaw clamp
• double bowed clamp
• winged clamp
• flat jaw clamp

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Question 40

Which instrument grasp has the palm of the hand faced more towards the operator?

• modified pen grasp
• modified palm and thumb grasp
• inverted pen grasp
• palm and thumb grasp

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Question 41

In Group function, which teeth comes in contact during lateral movement?

• canine, 1st premolar, 2nd premolar, mesial cusp of 2nd molar
• canine, 1st premolar, 2nd premolar, mesial cusp of 1st molar
• canine only
• 1st premolar, 2nd premolar, mesial cusp of 1st molar, mesial cusp of 2nd molar

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Question 42

Which component of dental amalgam acts as a deoxidizer by reducing hydrogen gas and other oxide formation?

• Tin
• Copper
• Silver
• Zinc

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Question 43

Which rubber dam clamp is used to access the distal of the molar the retractor is on?

• 00
• 14A
• 8AD
• 12A

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Question 44

Which type of dental amalgam has a buttery consistency?

• spherical
• admix
• lathe-cut

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Question 45

What is the shape or form of the preparation that prevents displacement or removal of the restoration by tipping or lifting forces?

• convenience form
• outline form
• resistance form
• retention form

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Question 46

Which type of handpiece uses a HP bur?

• high speed handpiece
• contra-angle low speed handpiece
• latch type handpiece
• straight low speed handpiece

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Question 47

Why is it important to ensure occlusal harmony after an operative procedure?

• to avoid failure/fracture of the tooth
• to avoid increased masticatory function
• to avoid failure/fracture of the restoration
• to avoid severe musculoskeletal, myofascial and TMJ related pain

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Question 48

Why do hand instruments have shanks that has more than one angle?

• for better access
• for better matching with rotary instrument
• for ease of manufacturing the instrument
• for better balance and control

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Question 49

A bur is more efficient in cutting when it has less blades/flutes.

• True
• False

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Question 50

Smaller holes on a rubber dam are more retentive but more difficult to seat.

• True
• False