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Operative II > Final Exam > Flashcards

Final Exam Flashcards

1
Q

When to place indirect restorations (inlays/onlays/veneers/crowns/etc.):

A
  1. when margin exceeds 2/3 the distance between the central groove and cusp tips
  2. when the margin ends 1/2 distance between the central groove and cusp tips
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2
Q

When to use an only instead of an inlay:

A
  1. when buccal-lingual width of cavity prep is:
    - 1/2 way between the central groove and cusp tips: consider onlaying the cusp
    - 2/3 way between central groove and cusp tips: should onlay the cusp
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3
Q

Inlay dimension:

A

1) isthmus must be atleast 2.0 mm wide and diverge
2) facial, lingual, and gingival margins must have clearance of atleast 0.5mm

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4
Q

Principles of gold onlays:

A) ___ bevel of ___ mm on cusps of ___ occlusion

B) ____ mm on cusp of ____ occlusion

C) Gold onlay- ____ reduction on functional cusp and ____ reduction on non-functional cusp

A

A) reverse bevel; 1-2mm; supporting

B) 0.5mm; non-supporting

C) 1.5 mm; 1.0 mm

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5
Q

Wears the opposing teeth the most and has the highest resistance to wear:

A

porcelain

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6
Q

List the following materials in order of most to least wear on opposing dentition:

  • direct resin composites
  • porcelain
  • lab processed composites
A
  1. porcelain
  2. lab processed composites
  3. direct resin composites
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7
Q

Describe the reduction needed for a porcelain onlay:

A

functional cusp: 2.0 mm
non-functional cusp: 1.5 mm

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8
Q

Describe the reduction needed for a gold onlay:

A

functional cusp: 1.5 mm
non-functional cusp: 1.0 mm

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9
Q

T/F: there should be NO bevel on porcelain margins

A

True

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10
Q

When considering a provisional, use a ____ cement.

A

eugenol-free

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11
Q

____ will interfere with bonding with a provisional

A

eugenol

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12
Q

If you must use eugenol when doing a provisional, you should:

A

pumice the tooth well to remove eugenol

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13
Q

____ prep is needed for porcelain veneers

A

minimal

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14
Q

When preparing for porcelain veneers, try to keep the prep within ____ for ____

A

enamel for optimal bond strength

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15
Q

What is the minimum depth that pins go into the dentin?

A

0.5 mm

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16
Q

Why don’t you want a pin on the mid mesial of #5?

A

concavity of the root

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17
Q

Why do you use increments when using composite?

A

to minimize polymerization stress

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18
Q

Dentist restores a lesion with resin infiltration by:

A

etch only

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19
Q

With two adjacent preps…

A

you should prep the largest first, but restore the smallest first

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20
Q

What bacteria is found in advanced dental caries?

A

Lactobacilli

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21
Q

0.5 mm dentin between the pulp and restoration, what should be used?

A

CaOH liner then RMGI

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22
Q

What does the oxygen inhibited layer do?

A

allows for wetablilty and allows adding more composite

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23
Q

1 mm above crestal bone you want to use:

A

amalgam

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24
Q

What is the minimum depth that pins must go into the dentin?

A

2 mm

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25
Q

Why wouldn’t you use a pin on the mid mesial of #5?

A

concavity of the root

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26
Q

Why do you place composite in increments?

A

to minimize polymerization stress

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27
Q

Dentist restores a lesion with resin infiltration by:

A

etch only

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28
Q

If you have two adjacent preps/restorations, you should:

A

prep largest first but restore smallest first

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29
Q

What type of bacteria is found in advanced dental caries?

A

lactobacilli

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30
Q

If you only have 0.5 mm of dentin between the pulp and restoration you should use:

A

CaOH liner (dycal or life) and then RMGI (vitrebond)

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31
Q

Increases wetbablity and allows adding more composite:

A

oxygen inhibited layer

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32
Q

If you are 1mm above crestal bone you want to use:

A

amalgam

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33
Q

The least desirable finish for porcelain veneer is

A

(maybe lingual something)

34
Q

Pins increase which of the following?

A

retention

35
Q

Emax is also known as:

A

lithium discilcate

36
Q

T/F: MO #3 gold onlay always break mesial proximal contact:

A

???

37
Q

What does adding more filler do?

A

increases strength

38
Q

Textbook author:

A

Dr. Sturdevant

39
Q

Demineralization of occurs at pH:

A

4.5

40
Q

Patient comes in with sensitivity and you had a and you have done a class V the day before and margins are sealed:

A

dentin tubules exposed during polishing

41
Q

Patient comes in with a small DO what do you recommend ad why?

A

composite to conserve tooth structure

42
Q

What increases surface area for bonding?

A

???

43
Q

Which of the following determines the success of a class II restoration?

A

moisture control

44
Q

Which liner do you use if your class II went too deep?

A

vitrebond

45
Q

Which of the following is most damaging to the periodontium?

A

overcountouring of a class V

46
Q

To increase dentin bonding you would use:

A

35% phosphoric acid

47
Q

Where does adjeasibe bond best?

A

intertubular dentin

48
Q

What tooth # would have pulp exposure if prepared perpendicular to long axis of tooth?

A

28

49
Q

Highest bonds achieved on enamel etching?

A

type I honeycomb

50
Q

From occlusal view, axial wall I class I prep looks:

A

convex

51
Q

Unfilled resorption is caused by:

A

overreaching

52
Q

Dr. Murphy likes to use what for class III with inflammation?

A

tofflemeyer

53
Q

What preparation would you use for a typical chipped front tooth

A

Class IV

54
Q

What type of prep would be used for a carious lesion in the gingival 1/3 of the tooth?

A

class V

55
Q

When do we not bevel in a class V preparation?

A

when we are below the CEJ

56
Q

Flexure and fatigue of enamel and dentin, caused by occlusal forces:

A

abfraction

57
Q

Feldspathic porcelain examples:

A

Vita and sirona blocks (tied)

58
Q

Leucite reinforced example:

A

IPS Empress (tied)

59
Q

Lithium discilicate example:

A

E MAX (tied)

60
Q

Should teeth whitening be done before or after veneer placement?

A

before!

61
Q

Where can you NOT put veneers?

A

highly fluorinated teeth or primary teeth

62
Q

With direct composite veneers what polishes best?

A

microfill composite resin

63
Q

What would you use for a class II Sub-G with bleeding?

A

tofflemire

64
Q

Which of the following should you NEVER bevel at the gingival margin?

A

porcelain inlay

65
Q

What is the LEAST desirable finish for a porcelain veneer?

A

lingual with feathered edge

66
Q

What is the single best risk factor for caries?

A

current caries

67
Q

What hypothesis do we currently believe?

A

specific plaque hypothesis

68
Q

What is the best prevention for pit and fissure caries?

A

fluoride and sealants

69
Q

Enamel dimineralization occurs at what pH?

A

5.5

70
Q

Dentin demineralization occurs at what pH?

A

6.2

71
Q

describe the progression of caries at the smooth surface: Describe the progression of caries at the root surface:

A

slow; fast (because of dentin)

72
Q

Put the following in order:

  • pummice
  • shade selection
  • rubber dam
  • etch
A
  1. shade selection
  2. pummice
  3. rubber dam
  4. etch
73
Q

What should be done if the prep exceeds 2/3 distance between central groove and cusp?

A

onlay

74
Q

Material to be used to build up on top of a a pin that is 1 mm above the alveolar crest

A

amalgam

75
Q

You would find the unbeveled sides in a class II prep at the enamel rods at the ___. The highest bond strength is at enamel ___.

A

sides; ends

76
Q

Check occlusion before you prep. Check occlusion after restoration is completed.

A

both statements true

77
Q

least common finish line for porcelain veneers:

A

supragingival

78
Q

Why do you do dovetails for inlays?

A

prevents proximal dispalcement

79
Q

What is true about dentin and what we want to bond to it:

A

dentin with sound collagen fibrils

80
Q

What is in your saliva that helps remineralization?

A

phosphate

81
Q
A

Operative II (6 decks)

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