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Operative II > Midterm Review > Flashcards

Midterm Review Flashcards

1
Q

Palodent should be placed:

A

1mm above margin of adjacent tooth

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2
Q

What does a cure through matrix do?

A

Acheives best contours

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3
Q

When do you re-etch?

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

How much do you break the facial contact in a class III?

A

.25 mm (to allow for matrix band & 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 lightcuring?

A

Smaller tip = increased heat & output

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10
Q

Elastic modulous 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

activator; blue light

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14
Q

What would you recommend to a patient with sensitivity?

A

Toothpaste with KNO3 (maybe glumma)

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15
Q

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

A

True (on the 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
  1. Class I
  2. Class II
  3. Class III
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19
Q

Reason for doing flowable at the bottom of the box:

A

To improve gingival margin seal

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20
Q

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

A

Do NOT bevel lingual margin? maybe sandpaper strips

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21
Q

Main reason for etching:

A

Increase SA and surface energy

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22
Q

Purpose of beveling the gingival margin:

A

Exposes enamel rods

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23
Q

What could result from composite sticking to tool?

A

void

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24
Q

Order from softest to hardest:

A

Cemuntum –> dentin –> enamel

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25
Q

Increasing the filler in composite leads to:

A

increasing strength & decreased shrinkage

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26
Q

Most esthetic for Class III & Class IV:

A

Microfill (hybrid)

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27
Q

What needs to be done prior to putting on rubber dam?

A

Check shade selection

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28
Q

What teeth do you isolate with rubber dam?

A

one tooth posterior & two teeth anterior

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29
Q

When you have two adjacent preps, you should:

A

Prep largest first, but 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 inflammatio

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32
Q

What restoration error would result in gingival irritation?

A

Overcontoured restoration

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33
Q

What is the reason to choose composite over amalgam:

A

esthetics

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34
Q

Why do you want a good path of entry:

A

Bonding will be better (may direction of enamel rods)

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35
Q

What should you consider when choosing between amalgam & composite?

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

(NOT family history of MS)

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36
Q

Dentin adhesive bonding can best be described as:

A

Collagen & 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 amalgam & composite except:

A

Final occlusal position

40
Q

Patient has a DO 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 / unbonded surfaces

A

C factor

43
Q

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

A

Mandibular first premolar #28
(you need a slanted prep here)

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

Micromechanical; micromechanical; chemical

46
Q

Collagen & resin from intertubular dentin:

A

Hybrid layer

47
Q

Abfraction primarily effects what portion of the tooth:

A

Cervical

48
Q

Tooth flexing & bending:

A

Abfraction

49
Q

Is bonding agent hydrophilic or hydrophobic?

A

Hydrophobic

50
Q

Where is retention groove in a class V prep placed?

A

Occlusal-axial angle

51
Q

Where is prismless enamel found?

A

Cervical

52
Q

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

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
54
Q

What leads to the most post-op sensativity

A

Bulk fill

55
Q

Why do you flare on the cavosurface?

A

To expose 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 fill

61
Q

All of the following are indications for composite except:

A

heavy occlusion on the contact

62
Q

Adhesive _____ in the presence of water

A

separates

63
Q

Instead of beveling in dentin you have a:

A

90 degree butt margin

64
Q

One key difference between composite and amalgam is:

A

Bevel gingival floor

65
Q

What is a reason we do not use Eugonol?

A

Inhibits polymerization (also BHT)

66
Q

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

A

Self-etch primer

67
Q

Self-etch systems contain:

A

Acid in primer

68
Q

T/F: If prep is deeper/closer to the pulp, you place retention grooves 1mm farther axially

A

False

69
Q

Strength for bonding comes from:

A

Collagen in intertubular dentin

70
Q

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

A

False

71
Q

Wider dentin tubules are near:

A

The pulp

72
Q

Erosion is caused by:

A

Chemicals (example lemons)

73
Q

When doing a class III preparation make sure you preserve the:

A

Incisal contact

74
Q

What is hybrid layer?

A

Resin with collagen (maybe resin with filler)

75
Q

Where does decay expand rapidly?

A

DEH

76
Q

Where does adhesive bond best?

A

Intertubular dentin

77
Q

Where do you put a retention groove in a class III?

A

Gingival wall

78
Q

Results in collapse of collagen layer and reduced bond strength:

A

Dessicating dentin

79
Q

Which is NOT true about beveling?

A

Removes layer of fluoride rich dentin

80
Q

Opaque composite requires ______ curing times

A

Longer

(we need for class III 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 bond strength:

A

Restoration will debond

83
Q

Component of resin matrix?

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 the composite past the enamel bevel

86
Q

Which liner do you use if your class II prep goes 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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