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Operative II > Important Info Combined > Flashcards

Important Info Combined Flashcards

1
Q

What is the couple agent in composite?

A

Silane

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2
Q

What do you remove with acid etch?

A

Smear layer

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3
Q

Etching will…

A

Increase SA and increase surface energy

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4
Q

Order of composite restoration:

A

Etch, bond, fill, finish, polish

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5
Q

Purpose of gingival bevel:

A

Expose ENDS of enamel rods

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6
Q

Definition of smear layer:

A

Mixture of tooth debris, often contaminated with saliva, blood cells, and bacteria

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7
Q

When to re-etch:

A

When contaminated or is not frosty white looking

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8
Q

Elastic modulus

A

Stiffness
low- less stiff for class V
High- more stiff

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9
Q

What matrix do you use for Class III ?

A

Mylar strip

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10
Q

When more filler is added, the composite is…

A

harder

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11
Q

Why do you use increments?

A

Minimize stress
Lower C factor

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12
Q

When are dentin tubules widest?

A

Near the pulp

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13
Q

Why is bonding to dentin harder?

A
  • Want to be wet, but not over wet
  • It is heterogenous
  • Want to bind to intertubular dentin, not peritubular
  • Interlocking with collagen fibers
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14
Q

What agent lowers the viscosity?

A

TEGDMA

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15
Q

Best agent to fill abfraction/class V lesion?

A

Nanofill or microfill

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16
Q

What causes irritated tissue?

A

Tofflemeier

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17
Q

Forming the hybrid layer consists of?
a. Acid etch
b. Rinsing tooth
c. Adhesive
d. Curing
e. All the above

A

e. All the above

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18
Q

What does a cure thru matrix do?

A

a. Achieve best contour

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19
Q

Beveling the gingival floor of a Class II helps with what?
a. good marginal sealing to the gingival floor
b. exposes sides of enamel rods for better bonding

A

a. good marginal sealing to the gingival floor

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20
Q

What’s the most important reason why you need indetectable margins?

A

Poor marginal sealing will lead to recurrent decay and staining

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21
Q

How much should you break the facial contact for Class 3?

A

a. 0.25 mm to fit the matrix and maintain aesthetics?

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22
Q

What type of composites are used at UMKC?

A

. Nanohybrids

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23
Q

Initiator is _____ for light-cured material

A

Camphorquinone

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24
Q

You should remove all of the following in a class III preparation, except?
a. Gingival contact
b. Facial contact
c. Incisal contact
d. Lingual contact

A

Incisal contact (becomes Class 4)

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25
Q

It is okay to leave unsupported enamel in class III prep

A

True

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26
Q

What do you do before putting on a rubber dam?

A

Check shade selection

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27
Q

What teeth do you isolate with a rubber dam in posterior?

A

One posterior, two anterior

28
Q

If you have two adjacent preps to do, which one do you do first?

A

Prep the largest one first and fill the smaller one first

29
Q

What is the initiator for chemical cure?

A

Benzoyl peroxide

30
Q

What would you recommend to a patient with sensitivity?

A

Toothpaste with KNO3 (potassium nitrate, found in the weird cave she was in)

31
Q

When should you evaluate occlusion?

A

Before placing the rubber dam

32
Q

What instrument do you use to shape anatomy before amalgam hardens?

A

Hollenback

33
Q

What do you use to clean a tooth before placing sealant?

A

Pumice
No prophy paste

34
Q

Self-etch is more predictable than total-etch (TRUE/FALSE)

A

false

35
Q

Where is the most likely carious lesion in a Class III?

A
  • gingival to contact
  • more lingual than facial
36
Q

Composite sticking to instruments can do what?

A

Create voids

37
Q

When do you use a flowable composite?

A

In the bottom of the box to achieve good gingival seal

38
Q

Where does enamel bind stronger ?

A

To the ends of enamel rods

39
Q

Where should the palodent be placed?

A

1mm above margin of adjacent tooth

40
Q

What does a cure through a matrix do?

A

Achieve the best contour

41
Q

Order from softest to hardest?

A

cementum-> dentin -> enamel

42
Q

What class has the highest C factor?

A

Class I (and then class II)

43
Q

What causes gingival irritation?

A
  • Over contoured restoration (more likely to cause perio problems)
  • Improper wedging
44
Q

Dentin adhesive bonding best described as…

A

Collagen and resin interlocked in intertubular dentin

45
Q

Lower polymerization stress shrinkage means lower C factor. C factor bonding is divided by unbonded surfaces.

A

Both are true

46
Q

Bonding agent _____ binds to enamel?

A

MICROMECHANICAL

47
Q

Bonding agent ____ binds to dentin?

A

MICROMECHANICAL

48
Q

Bonding agent ____ binds to resin?

A

chemical

49
Q

Definition of hybrid layer:

A

Collagen and resin from intertubular dentin

50
Q

Hybrid layer: collagen + resin form; intertubular dentin →

A

bond here

51
Q

Tooth flexing and bending:

A

Abfraction

52
Q

Abfraction primary affects what portion of the tooth:

A

Cervical

53
Q

What is hydrophobic?

A

bonding agent

54
Q

Prismless enamel is found where?

A

Cervical

55
Q

What leads to the most post-op sensitivity?

A

bulk fill

56
Q

Where do we bevel?

A

gingival floor

57
Q

Why do you flare on the cavosurface?

A

To expose the ends of enamel rods

58
Q

Why do you NOT bevel?

A

To expose the SIDES of enamel rods

59
Q

Amalgam condensation?

A

Fill box 1st and fill 1mm above margin

60
Q

DO NOT BOND TO

A

SMEAR LAYER

61
Q

Why does composite fail?

A

More dentin tubules as prep gets deeper toward pulp

62
Q

Acid etch vs self etch

A
  • Prepares tooth, remove smear layer to increase retention=acid etch
  • Contains acid in primer-> only partly removes smear layer = self
63
Q

DONT PLACE RETENTION GROOVE IF CLOSE TO

A

PULP

64
Q

Sensitivity treatment options

A

Noninvasive treatment should be done first

65
Q

BisGMA is hydrophobic ????

A

idk

66
Q

Bulk fill composition

A

MMA
AUDMA
Fragmentation dimethacrylate monomers

67
Q

Gingival flash removed with ??

A

KNIFE

Operative II (11 decks)

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