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Operative II > Midterm Review > Flashcards

Midterm Review Flashcards

1
Q

Palodent should be placed:

A

1 mm above the margin of adjacent tooth

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2
Q

What does a cure thru matrix do?

A

achieves the best contours

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3
Q

When to re-etch?

A
  1. if contaminated
  2. if it doesn’t appear etched
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4
Q

How much should you break the facial contact for class III?

A

0.25 mm (to allow for matrix band and good esthetics)

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5
Q

What type of composites are used at UMKC?

A

nanohybrids

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6
Q

What is NOT true about an S-curve?

A

makes walls diverge

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7
Q

What do the methacrylate monomers in bulk fill do?

A

relieve stress

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8
Q

What do you use for a class III?

A

mylar strips

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9
Q

What is true about the smaller tip when light curing?

A

smaller tip = increased heat and output

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10
Q

Elastic modulus also means?

A

stiffness

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11
Q

Couples filler with resin (coupling agent)

A

silane

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12
Q

axiopulpal line angle is ____ in amalgam to improve

A

beveled; resistance

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13
Q

Camforquinone is a _____ and is activated by:

A

initiator; blue light

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14
Q

What would you recommend for a patient with sensitivity?

A

tooth paste with KNO3 (maybe glumma too)

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15
Q

T/F it is okay to leave unsupported enamel in a class III prep:

A

true (facial wall)

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16
Q

Order of composite restoration:

A
  1. etch
  2. bond
  3. fill
  4. finish
  5. polish
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17
Q

Reason for box only prep?

A

to conserve tooth structure

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18
Q

What class has the highest c-factor?

A

class I > class II > class III

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19
Q

Reason for doing flowable at the bottom of a box?

A

to improve gingival margin seal

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20
Q

What should you do if you have heavy contact on the lingual of a class III or class IV?

A

do not bevel lingual margin? Maybe sandpaper strips after too)

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21
Q

Main reason for etching is:

A

increase surface area and surface energy

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22
Q

Purpose of beveling gingival margin:

A

exposes enamel rods

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23
Q

What could result from composite sticking to a tool?

A

void

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24
Q

Order from softest to hardest:

A

cementum then dentin then enamel (hardest)

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25
Q

Increasing the filler in composite leads to:

A
  1. increased strength
  2. decreased shrinkage
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26
Q

Most esthetic for class III and class IV:

A

microfill (hybrid)

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27
Q

What do you do before putting on a rubber dam?

A

shade selection

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28
Q

What teeth do you isolate with rubber dam?

A

one tooth posterior and two teeth anterior

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29
Q

When you have two adjacent preps you should

A

prep the largest first, and then restore the smallest first

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30
Q

Incremental layers of composite creates:

A

less stress

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31
Q

Improper wedging can result in:

A

gingival inflammation

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32
Q

What restoration error would result in gingival irritation?

A

over contoured restoration

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33
Q

What is the reason to choose composite over amalgam?

A

patient wanting a tooth colored filling

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34
Q

Why do you want a good path of entry?

A

bonding will be better (maybe due to direction of enamel rods)

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35
Q

What should you consider when choosing between amalgam and composite?

A
  1. diet
  2. placement of caries
  3. ability to isolate

(Family history of MS is not a consideration)

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36
Q

Dentin adhesive bonding can best be described as:

A

collagen and resin interlocked intertubular dentin (hybrid layer)

37
Q

Should the smear layer be removed?

A

yes

38
Q

Palodent is best used for:

A

small class II composite

39
Q

All of the following are differences between composite and amalgam except:

A

final occlusal position

40
Q

Pt has a DO done on #4, and now has cold sensitivity and inflamed gums, what is likely the cause?

A

fluid in dentinal tubules

41
Q

Lower polymerization shrinkage means lower:

A

c factor

42
Q

bonded surfaces divided by unbonded surfaces =

A

c bond

43
Q

In what tooth are you most likely to expose the pulp by going in with the long axis of the tooth?

A

mandibular first pre molar #28 (need a slanted prep)

44
Q

Adhesive solvent that we use at UMKC:

A

Ethanol

45
Q

Bonding agent ___ bonds to enamel. Bonding agent ____ bonds to dentin. Bonding agent ___ bonds to resin

A

micro mechanical
micro mechanical
chemical

46
Q

collagen and resin from intertubular dentin:

A

hybrid layer

47
Q

Tooth flexing and bending:

A

abfraction

48
Q

Abraction primarily affects what portion of the tooth:

A

cervical

49
Q

Is bonding agent hydrophilic or hydrophobic?

A

hydrophobic

50
Q

Where is retention groove in class V prep placed?

A

occlusal axial angle

51
Q

Prismless enamel is found:

A

cervical

52
Q

What will prevent you from having a good contact in class II?

A
  1. sectional matrix
  2. pre-wedge
53
Q

Where do you bevel for a class II?

A
  1. axiopulpal line angle
  2. gingival
  3. lingual wall
54
Q

What leads to the most post-op sensitivity?

A

bulk fill

55
Q

Why do you flare on the Cavosurface?

A

to expose the ends of the enamel rods

56
Q

Why is it harder to bond to dentin than enamel?

A

dentin is more heterogenous

57
Q

T/F You bevel to expose the SIDES of enamel rods:

A

false

58
Q

Longevity of the tooth is also known as:

A

fracture toughness

59
Q

Root surface caries are more commonly found on:

A

gingival to the contact

60
Q

All of the following are reasons we have failure at the gingival portion of the box EXCEPT:

A

incremental fills instead of bulk

61
Q

All of the following are indications of composite EXCEPT:

A

heavy occlusion on the contact

62
Q

Adhesive ___ in the present of water

A

separates

63
Q

Instead of beveling in dentin you:

A

90 degree butt margin

64
Q

Key difference in composite and amalgam is:

A

bevel gingival floor

65
Q

Why do we not use eugenol?

A

inhibits polymerization (also BHT)

66
Q

not strong enough to etch enamel, only partially removes smear layer:

A

self-etching primer

67
Q

Self etch systems contain

A

acid in the primer

68
Q

T/F: if prep is deeper/closer to the pulp you place retention groove 1 mm farther axially:

A

false

69
Q

Strength for bonding comes from :

A

collagen in intertubular dentin

70
Q

T//F: You must put bonding in between every increment of composite:

A

false

71
Q

Wider dentin tubules are near the:

A

pulp

72
Q

Erosin is caused by:

A

chemicals (like lemons)

73
Q

When doing a class III make sure you preserve the:

A

incisal contact

74
Q

What is hybrid?

A

resin with collagen (or maybe its filler)

75
Q

Where does decay expand rapidly?

A

DEJ

76
Q

Where does adhesive bond best?

A

intertubular dentin

77
Q

Where do you put retention groove in a class III?

A

gingival wall

78
Q

Results in collapse of collage layer and reduced bond strength:

A

desiccating dentin

79
Q

Which is not true about beveling?

A

removes layer of fluoride rich dentin

80
Q

Opaque composite requires:

A

longer curing times (need for class II so light doesn’t shine through)

81
Q

Which of the following has the highest flexural strength?

A

hybrid

82
Q

If adhesive bond strength is less than polymerization strength:

A

restoration will debond

83
Q

Component of resin matrix is

A

Bis GMA

84
Q

Which fill has the best wear resistance?

A

microfill

85
Q

What is true about class IV restorations?

A

you should extend composite past the enamel bevel

86
Q

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

A

CaOH (dycal)

87
Q

On a class III, caries occur:

A

below the contact

88
Q

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

A

good isolation

89
Q
A

Operative II (6 decks)

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