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Operative II > Final Important Info Combined > Flashcards

Final Important Info Combined Flashcards

1
Q

If the margin of a class IV restoration extends far onto the lingual which of the following is appropriate

A

Dovetail

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2
Q

On a class III, where is the retention groove placed

A

Gingival floor

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3
Q

On which of the following should you never bevel the gingival margin

A

Porcelain inlay

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4
Q

Which of the following is true about bulk fill composites

A

They have methacrylate monomers which decrease the stress

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5
Q

Which of the following is true about reverse S curve
a. Never place a reverse S in composite restoration
b. Reverse S provides maximum strength to the restoration and the tooth

A

um idk- B? bc it improves resistance to fracture
From slides:
-nearly always on buccal side
-creates smooth rounded outline (improves resistance to fracture)
-keeps narrowest part of prep away from axiopulpal line angle (improves resistance to fracture)
-allows prep to break contact while allwoing the buccal wall to meet the tooth surface at 90 degree exit angle

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6
Q

Which of the following has the highest flexural strength

A

Hybrid?

Permanent restorative materials –> zirconia

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7
Q

Micromechanical bond to dentin and enamel, but chemical bond to the resin

A

true?

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8
Q

Adhesive bond strength less than polymerization bond strength

A

Restoration debonds

genuinely have no idea what this means

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9
Q

Component of resin matrix is

A

BisGMA

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10
Q

When more filler is added it

A

Increases hardness

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11
Q

Which of the following is true about the oxygen inhibited layer

A

Increases surface wetting and allows additional layers to be added

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12
Q

Perpendicular enamel rods are found where

A

Cavosurface margins of Class I

& bevels of class II’s

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13
Q

At UMKC we want a light that

A

Has at least 550 mW/cm2, light tip inversely proportional to output

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14
Q

Patient comes in with discolored 6 anterior teeth. What do you first recommend?

A

Bleaching

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15
Q

Which of the following is not true about indirect restorations

A

Less cost

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16
Q

Best wear resistance is

A

Microfill (WRONG)

pretty confident it is hybrid

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17
Q

Which of the following is true about class IV restorations

A

Extend the composite past the enamel bevel

(i don’t think this is right- haley)
“remove composite back to cavosurface bevel” –> cover at least as much sound enamel as the prep/fractured area

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18
Q

When you have class III and IV that extends to the facial surface, what do you use

A

Microfill

can also use nano

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19
Q

What is the least desirable finish for porcelain veneer

A

Lingual with feathered edge

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20
Q

Which requires the greatest incisal reduction

A

Feldspathic

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21
Q

Pins increase which of the following
a. Retention
b. Resistance
c. Convenience

A

a. Retention

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22
Q

What is the minimum depth that pins go into the dentin

A

2mm

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23
Q

If you prepare a class II prep parallel to the long axis of the tooth, which tooth is most likely to have a pulp exposure

A

Mandibular first premolar

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24
Q

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

A

Concavity of the root

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25
Q

You can leave unsupported enamel on class III prep

A

true

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26
Q

You take off a matrix band and you have a void on the gingival box. what happened?

A

Initial increment was too large

composite sticking to instrument can cause voids as well

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27
Q

Which of the following is true about strep mutans

A

It doesn’t survive in high pH

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28
Q

Why do you use increments

A

To minimize stress

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29
Q

C factor changes with incremental composite and changes what

A

Polymerization stress

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30
Q

Dentin is demineralized at a pH of

A

6.2

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31
Q

You would find the sides of the enamel rods at ____. The highest bond strength is at the enamel ___

A

Gingival floor of class II, ends

also find sides at internal walls of occlusal preps

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32
Q

An example of the medical model versus surgical model

A

Diagnosis of disease, treatment of problem/pain

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33
Q

Single best risk factor for caries

A

Current caries

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34
Q

For someone with current caries or at high risk of caries, which intervention do you recommend first

A

fluoride

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35
Q

Why do you do dovetails for inlays

A

Prevent proximal displacement

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36
Q

Patient comes in with sensitivity and you had done a class V the day before and the margins are sealed. What is the issue

A

Dentin tubules exposed during polishing

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37
Q

Patient comes in with small DO, what do you recommend

A

Composite to reserve tooth structure

38
Q

Which theory do we currently believe

A

Specific plaque hypothesis

39
Q

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

A

Vitrebond

40
Q

Which of the following is most damaging to the periodontium

A

Overcontouring of class V

41
Q

Which instrument do you use for removing flash at the gingival margin

A

gold knife

42
Q

Where are dentin tubules widest

A

close to the pulp

43
Q

Abfraction is caused by additional stress at the

A

cervical area

44
Q

Prepare the _____ prep first, restore the _______ first

A

largest, smallest

45
Q

Which part of dentin binds to the resin

A

Intertubular

46
Q

Etching does what

A

Increases surface area and surface energy

47
Q

Increased modulus of elasticity means increased

A

Rigidity

48
Q

On a class III, caries occur

A

Below the contact

49
Q

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

A

Good isolation

50
Q

What is the minimum depth that pins go into the dentin
a. 2mm
b. 0.5 mm
c. 1mm

A

a. 2mm

51
Q

Why don’t you want a pin on the mid mesial of #5
a. Concavity of the root
b. Convexity of rooth

A

a. Concavity of the root

52
Q

Why do you use increments
a. To increase strength
b. To minimize polymerization stress

A

b. To minimize polymerization stress

53
Q

Dentist restores a lesion with resin infiltration by
a. No preparation
b. Etch only
c. Conservative with 330 bur
d. Conservative with 1⁄4 bur

A

b. Etch only

54
Q

Two adjacent preps

A

Prep largest first, restore smallest first

55
Q

Found in advanced dental caries

A

Lactobacilli

56
Q

0.5mm dentin between pulp and restoration should use

A

CaOH liner then RMGI

57
Q

Oxygen inhibited layer

A

Increase wettability and allow adding more composite

58
Q

1mm above crestal bone you want to use
a. Amalgam
b. Glass ionomer
c. Hybrid
d. Microfill

A

a. Amalgam

59
Q

least desirable finish for porcelain veneer EXCEPT—we don’t know
a. Overlap butt joint
b. Finishing equal with the incisal edge
c. Lingual with feathered edge

A

i think its a- haley

60
Q

Pins increase which of the following
a. Retention
b. Resistance
c. Convenience

A

a. Retention

61
Q

E Max is

A

a. Lithium disilicate

62
Q

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

A

idk
you do for ceramic but idk about gold

63
Q

Adding more filler (this q was on there 2x)

A

increase strength

64
Q

Your textbook author is
a. GV Beck
b. Dr. Meredith
c. Dr. Murphy
d. Dr. Sturdevant

A

d. Dr. Sturdevant

65
Q

demineralized at a pH of fluorinated
a. 4.5
b. 6.2
c. 5.5
d. 3.2

A

a. 4.5

66
Q

Patient comes in with sensitivity and you had done a class V the day before and the margins are sealed. What is the issue

A

a. Dentin tubules exposed during polishing

67
Q

Patient comes in with small DO, what do you recommend and why

A

a. Composite, to conserve tooth structure

68
Q

What increases surface area available for bonding?
a. 37% Phosphoric acid
b. Etch
c. Scratching up composite surface
d. All of the above

A

d. All of the above?

69
Q

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

A

a. Moisture control

70
Q

Which liner do you use if your class II went too deep
a. Vitrebond
b. Eugenol
c. something
d. none of the above

A

a. Vitrebond

71
Q

Which of the following is most damaging to the periodontium

A

a. Overcontouring of class V

72
Q

To increase dentin bonding you would

A

a. Use 35% phosphoric acid

73
Q

Where does adhesive bond best
a. Intertubular dentin
b. Peritubular dentin

A

a. Intertubular dentin

74
Q

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

A

28

& 21 (mand 1st premolars)

75
Q

Highest bonds achieved in enamel etching
a. Type III combination
b. Type V flat and smooth
c. Type I honeycomb

A

c. Type I honeycomb

76
Q

from occlusal view, axial wall in class I prep look
a. Convex
b. Concave
c. straight

A

a. Convex

77
Q

Unfilled restoration is caused by
a. Overetching
b. Overdrying
c. Underdrying

A

a. Overetching

78
Q

Dr. murphy likes to use what for class III with gingival inflammation
a. plastic clear strip
b. tofflimyer

A

b. tofflimyer

79
Q

order: pummice, shade selection, rubber dam, etch

A

true

80
Q

Prep exceeds 2⁄3 between central groove and cusp, should place
a. Inlay
b. onlay

A

b. onlay

81
Q

Material to build on top of a pin that is 1 mm above alveolar crest
a. Microfill
b. Hybrid
c. Amalgam

A

?

82
Q

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

A

a. side, ends

83
Q

Single best risk factor for caries

A

a. Current caries

84
Q

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

A

Both statements true

85
Q

Porcelain veneers least common finish line
a. Supragingival
b. Subgingvial
c. Equigingival

A

a. Supragingival

86
Q

For someone with current caries or at high risk of caries, which intervention do you recommend first?
a. Sealant
b. Amalgam restoration
c. Fluoride
d. Composite restoration

A

c. Fluoride

87
Q

What do you do for low Caries risk patient?
a. Give advice on oral hygiene
b. Fluoride at 5000 ppm
c. Surgical restorations

A

a. Give advice on oral hygiene

88
Q

Why do you do dovetails for inlays

A

a. Prevent proximal displacement

89
Q

What is true about dentin and what we want to bond it to?
a. Dentin with sound collagen fibrils
b. etching dentin with % acid
c. Beveling gingival margin in cementum

A

a. Dentin with sound collagen fibrils

90
Q

What is in your saliva that helps remineralization?
a. Sodium
b. Bicarbonate
c. Phosphate
d. Chloride

A

idk
(i feel like this may be bicarbonate because it is a neutralizer, and if you can neutralize the pH that would help remineralization)

Operative II (11 decks)

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