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Operative Dentistry > Midterm II > Flashcards

Midterm II Flashcards

1
Q

1 What type of composite resins are most commonly used today? 1

a. Macrofill
b. Nanohybrids
c. Microfill
d. Macro/micro hybrids

A

B

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2
Q

2 Advantages of composite resin restorations include all of the following, except:1

a. The C factor
b. Esthetics
c. Insulation
d. Bonds to tooth structure

A

A

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3
Q

3 Operator skill is less of a factor for composite resin restorations as compared to amalgam restorations. 1

a. True
b. False

A

B

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4
Q

9 What is the purpose of the clamp configuration? 1

a. Protecting the patient so they do not swallow the dam
b. Easy placement and holding the dam in place
c. A finger rest for the dentist
d. It is arbitrary

A

B

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5
Q

10 Why is it important to have more than one tooth isolated by the dam? 1

a. To help with color matching of composite material
b. To assure proper orientation of the mouth and teeth
c. To help keep proper contacts and marginal ridge height
d. All of the above
e. B and C

A

E

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6
Q

11 Which of these teeth are the most difficult to place rubber dam clamps on? 1

a. Teeth 18 or 31
b. Teeth 8 or 9
c. Teeth 24 or 25
d. Teeth 22 or 27

A

C

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7
Q

12 Why is it hard to place a rubber dam clamp on tooth #2 and #15 (assuming wisdom teeth are not present)? 1

a. The coronoid process gets in the way when the mouth is open
b. The further back in the mouth you get, the darker it gets
c. Gingival hyperplasia is much more common around those particular teeth
d. The unique shape of those teeth make it difficult for manufacturers to create a proper clamp to fit around them.

A

C

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8
Q

13 Why are there so many different configurations of rubber dam clamps? 1

a. Some were invented specifically to reduce reflection of lighting back into the clinician’s eyes
b. Teeth come in many different shapes and sizes, and so one size of clamp may be preferable to another when working with a particular tooth
c. Some are made “wingless” to mitigate bulk, making working around them easier for some dentists
d. Some are made with wings to provide extra retraction of the rubber dam from the field of operation
e. All of the above

A

E

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9
Q

14 Tying floss to the clamp is used to help retrieve the clamp in case it comes off the tooth. It is also used to push the rubber dam down into the interproximal spaces. 1

a. The first statement is TRUE. The second statement is FALSE.
b. The first statement is FALSE. The second statement is TRUE.
c. Both statements are TRUE.
d. Both statements are FALSE.

A

C

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10
Q

15 Another name for the corners of the mouth is __________. 1

a. Philtrum
b. Ala
c. Commisure
d. Vermillion Border

A

C

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11
Q

16 The following is not a way to protect the lip while using a rubber dam: 1

a. Use water soluble lubricant
b. Loosen dam
c. Place 2x2s there
d. Shaving cream
e. Tighten the rubber dam frame

A

E

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12
Q

17 Why would a dentist put a rubber dam clamp gingival to the height of the contour? 1

a. Because it’s more exciting
b. So that the clamp will stay in place
c. It prevents gingivitis
d. B and C

A

B

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13
Q

18 Which answer is not a purpose of the rubber dam? 1

a. Prevent the restorative materials from entering the mouth
b. Isolate the tooth from oral fluids
c. Improve bonding quality
d. Prevent the patient from talking

A

D

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14
Q

19 An advantage of a winged-clamp compared to a wingless clamps is: 1

a. Winged clamps are less painful for the patient
b. Winged clamps can be used on both the maxillary and the mandible
c. Winged clamps prevent tearing of the dam
d. Winged clamps allow a dentist to carry the dam to the tooth and place the dam and clamp simultaneously

A

D

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15
Q

20 Why would you use floss on a clamp without wings? 1

a. To push the clamp in between the interproximal space of two teeth
b. To clean the tooth before performing restoration
c. To prevent the clamp from going down the patient’s throat
d. To wedge between the teeth to hold the clamp more securely

A

C

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16
Q
  • **??21 What do you do if a patient comes in and they need a rubber dam for a procedure but they cannot breathe through their nose? 1
    a. Send the patient home until they can come back and breathe through their nose.
    b. Put the rubber dam at an angle or put 2 by 2 cotton gauze in to prop the dam.
    c. Don’t use a dam. Just use cotton rolls wedged on all sides of the teeth you are working on.
    d. None of the above
A

B

17
Q

22 Why would you use a “wegit” or part of the rubber dam as a wedge between teeth? 1

a. To add thickness to the rubber dam
b. To hold the rubber dam in place without a clamp
c. To avoid hitting the neighboring tooth
d. To make it more comfortable for the patient

A

B

18
Q

23 When punching holes in the rubber dam, punching the holes too close together can cause the dam to _______, while punching the holes too far apart can cause the dam to __________. 1

a. tear, bunch up
b. bunch up, tear

A

A

19
Q

24 Carious lesion is usually just _______ to the contact. 1

A

Gingival

20
Q

25 The facial wall of a class III prep is _______ to the lingual. 1

A

Parallel

21
Q

26 The axial wall of a Class III prep is _______ to the proximal surface. 1

A

Parallel

22
Q

27 The bevel on all accessible margins of a Class III prep is _____ mm. 1

A

0.5

23
Q

28 The pull through technique of placing a composite restoration refers to pulling the matrix toward the _____ margin just before curing. 1

A

Facial

24
Q

30 What is a major challenge of dentin/enamel bonding? 1

A

Having to bond to two different surfaces.

25
Q

31 Where is the area most commonly associated with the failure of composite resin restorations? 1

A

Cavosurface margin

26
Q

32 When using Peak Universal Bond, according to the manufacturer, you etch the tooth with phosphoric acid for what length of time? 1

A

15 seconds on dentin, 30 on enamel

27
Q

37 The use of the rubber dam is best indicated for ______. 1

a. Adhesive procedures
b. Quadrant dentistry
c. Teeth with challenging preparations
d. Difficult patients
e. All of the above

A

E

28
Q

38 A rubber dam is inverted to 1

a. Prevent the dam from tearing
b. Prevent the underlying gingiva from accidental trauma
c. Provide a complete seal around the teeth
d. All of the above

A

C

29
Q

???40 When preparing a class III or IV composite tooth preparation, which of the following statements regarding placement of retention form is false? 1

a. Placement of retention form often involves gingival and incisal retention.
b. Placement of retention form is placed at the axiogingival line angle regardless of the depth of the axial wall.
c. Placement of retention form may be needed in large preparations.
d. Placement of retention form is usually prepared with a No. 1/4 round bur.

A

B

30
Q

43Factors that affect the success of dentin bonding include all of the following except one. Which one is the exception? 1

a. Dentin factors such as sclerosis, tubule morphology, and smear layer
b. Tooth factors such as attrition, abrasion, and abfraction
c. Material factors such as compressive and tensile strengths
d. C-factor considerations

A

B

31
Q

44 The generally accepted maximum thickness of a composite increment that allows for proper cure is _____. 1

a. 1 to 2 mm
b. 2 to 4 mm
c. 4-6 mm
d. There is no maximum thickness restriction.

A

A

32
Q

??46 Major differences between total-etch and self-etching primer dentin bonding systems include all of the following except one. Which one is the exception? 1

a. The time necessary to apply the material
b. The amount of smear layer removed
c. The bond strengths to enamel
d. The need for wet bonding

A

D

33
Q

47 Which of the following statements is not true regarding bonding systems? 1

a. Although dentin bonding occurs slowly, it results in a stronger bond than to enamel.
b. Enamel bonding occurs quickly, is strong, and is long-lasting.
c. One-bottle dentin bonding systems may be simpler but are not always better.
d. Dentin bonding is still variable because of factors such as sclerosis, tubule size and tubule location.

A

B

34
Q

50 Which one of the following acids is generally recommended for etching tooth structure? 1

a. Maleic acid
b. Polyacrylic acid
c. Phosphoric acid
d. Tartaric acid
e. Ethylenediamine tetra-acetic acid

A

C

35
Q

51 The principle goals of bonding are ______. 1

a. Sealing and thermal insulation
b. Strengthening teeth and esthetics
c. Esthetics and reduction of post-operative sensitivity
d. Sealing and retention
e. Retention and reduction of tooth flexure

A

D

36
Q

51 The principle goals of bonding are ______. 1

a. Sealing and thermal insulation
b. Strengthening teeth and esthetics
c. Esthetics and reduction of post-operative sensitivity
d. Sealing and retention
e. Retention and reduction of tooth flexure

A

D

37
Q

73 Place the following steps for the application of an etch-and-rinse (total-etch) three-step dental adhesive in correct sequence. 1

a. Apply adhesive ____
b. Rinse etchant and leave surface wet ____
c. Complete tooth preparation __
d. Apply two to three layers of primer ____
e. Etch enamel and dentin with phosphoric acid for 10 to 15 seconds ____
f. Light-cure ____

A 
A- 4
B- 2
C- 6
D- 3
E- 1
F- 5

Operative Dentistry (4 decks)

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