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Tim's Cards > Operative Test 4 > Flashcards

Operative Test 4 Flashcards

1
Q

Composite =

A

Glass + Nalgene

silica + Bis GMA

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2
Q

Bis GMA has high _____ shrinkage

and limited ______ wear resistance

A

Polymerization

Occlusal

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3
Q

T/F

Compared to Amalgam, composites have larger Proximal Extensions

A

True

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4
Q

T/F

The cavo-surface on the occlusal needs an additional bevel in Class II composite restorations

A

False

*NOT - only USC teaches

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5
Q

T/F

Retention points are needed in Class II composites

A

False

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6
Q 
T/F
1 mm bevels are added in the box at the cavo surface margins (3 of them) in a class II composite prep
A

True

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7
Q

What type of Composite shouldn’t be used in Posterior?

Microhybrid, nano-composites, or microfilled

A

Microfilled

*too brittle

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8
Q

Name 2 Microhybrid composites, 2 Nano-composited, and on Highly Filled composite:

A

Venus, Hurculite XRV (microhybrid)

Filtek, Premise (Nano-composite)

Helio-Molar (Highly filled composites)

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9
Q

Composite Instruments (W3, Mini1, #3 Extra-Flex, TNCFIS/.M, 5A) should never be exposed to what?

A

Peroxide

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10
Q

What type of wedge should be used for Class II composite restorations?

A

Plastic

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11
Q

Flowable Composites are easy to apply but _______

A

have high polymerization shrinkage

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12
Q

Microfilled composited are highly polishable and have good transparency but _______

A

Poor fracture strength

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13
Q

Hybrid composites are the MOST used by dentists b/c they are versatile, have good over all strength, but the silica can be_____

A

plucked out

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14
Q

Nano-composites have the least shrinkage, least resin, good wear resistance, but are ______

A

expensive

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15
Q

Flowable Composite brand:

Micro-hybrid brand:

Glass Ionomer (RMGI) brand:

Nano-composite brand:

A

Tetric Flow

Herculite XRV, Venus

GC Fuji II LC Capsule

Filtek, Premise

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16
Q

247 diamond is good for:

A

Groove anatomy

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17
Q

Composite Instruments are made from:

A

NIAlN

Nickel Aluminum Nitride

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18
Q

Tofflemire Band is better on amalgams, _____ is better for composites

A

Sectional Matrix

*gets tighter contact more consistently

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19
Q

The Garrison Tight 3D ring we use for Class II composites brand name:

A

Composi-Tight 3Dfusion

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20
Q

37% Phosphoric acid can have _______, an antimicrobial that extends the life of a composite restoration

A

BAC - benzylalkylchloride

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21
Q

What type of Bonding (generation) are we using?

What brand?

Gold Standard?

Brand?

A

5th Gen

Optibond Solo plus

4th Gen

All Bond

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22
Q

When can Chlorhexidine be added to restoration?

A

After etch, Pre bond

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23
Q

T/F

Post etch, pre-bond can be GLUMA, HEMA, or CHX

A

True

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24
Q

Class II composite restoration: Etch, Rinse, (gluma, hema, chx), bond, cure, _______, composite

A

flowable

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25
Q

What is the smallest composite instrument called?

A

XTS Mini#1

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26
Q

What is the best Composite instrument for the occlusal?

A

XTS W-3

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27
Q

The last step before finishing (that we never did in lab) is a _______ flow that fills small voids

A

Heloimolar

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28
Q

Pre finish with:

Polish with:

Then Glaze, Check occlusion with Articulating Paper

A

Burs (must use water) and Instruments (DeMeo)

Discs

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29
Q

T/F

It is necessary to remove the Transparent Layer of Dentin in a carious lesion

A

False

*No bacteria present, de-mineralized but collagen cross-linking is intact and can be remineralized

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30
Q

Infected Dentin has ______

Affected Dentin has ______

A

bacteria

bacterial by-products (and can re-mineralize)

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31
Q

Reparative Dentin, aka ________

A

Tertiary Dentin

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32
Q

How long does it take for Dentinogenesis (Tertiary Reparative Dentin) to take place?

A

20-40 days

*requires healthy pulp

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33
Q

What Growth Factor stimulates Tertiary (reparative) dentin?

A

TGF-B1

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34
Q

What is the critical pH for demineralization/remineralization?

A

5.5

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35
Q

Caries spreads along the DEJ, undermines enamel, and follows what?

A

Dentinal tubules toward pulp

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36
Q

If an early carious lesion is limited to the surface of the enamel, what is proper Tx?

A

re-mineralization

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37
Q

T/F

White spot lesions must be restored

A

False

*re-mineralized

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38
Q

Rapidly growing decay can be what color?

A

Same as Dentin

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39
Q

Acute caries are rapidly progressing, their texture is ______ and _____, their color is ______

A

soft

moist

yellow

40
Q

T/F

Chronic caries are leathery and Dark

A

True

41
Q

Sclerotic Caries are what color?

A

Dark brown/black

*very firm, do not remove (not active)

42
Q

T/F

Root caries tend to be dark/similar color to dentin

A

True

43
Q

ICDAS:

A

International Caries Detection and Assessment System

44
Q

ICDAS 0: (definitions)

ICDAS 1:

ICDAS 2:

ICDAS 3:

ICDAS 4:

ICDAS 5:

ICDAS 6:

A

Sound tooth

Enamel change seen only after drying (90 enamel/10 dentin)

Visual change (50/50)

Enamel breakdown (77 in Dentin), no shadow

88 in Dentin, Dark shadow

Visible Dentin (100)

Dentin 100, more than 1/2 tooth surface

45
Q

ICDAS 0: (Tx)

ICDAS 1:

ICDAS 2:

ICDAS 3:

ICDAS 4:

ICDAS 5:

ICDAS 6:

A

Sealant

Sealant

Sealant

Sealant/PRR (or MIR)

MIR (minimally invasive restoration)

MIR

MIR

46
Q

What ICDAS level has Optional Sealants?

A

Low Risk: 0, 1, 2

Moderate Risk: 0

*all else follows pattern: Sealants 0-2, PRR/Sealant/MIR 3, MIR 4-6

47
Q

Likelihood of cavitation: E1

E2

D1

D2

D3

A

0%

10.8%

??

40.9%

100%

48
Q

What measures Fluorescence?

A

Diagnodent Laser

49
Q

0.5% fuchsin in propylene glycol can delineate what?

A

Outer irreversibly denatured dentin

Inner reversibly affected dentin

(infected/affected)

50
Q

When is the Incomplete Removal of caries justified?

*Indirect Pulp Cap (involved CHX and liner

A

No Hx spontaneous pain

Vital pulp

51
Q

Thin layer CaOH or MTA:

A

Direct Pulp Cap

52
Q

T/F

Dentin gets softer on the way to the pulp, and if carious gets much harder due to Sclerosis (remineralization)

A

True

53
Q

What pulp protectant inhibits the setting of Composites?

Which releases fluoride and is acid soluble?

Which is Basic, is used in Direct Pulp Cap, and breaks down quickly?

Which is Basic, sterile, hydrophilic, and Expensive?`

A

Zinc Oxide Eugenol

GI

CaOH paste

MTA - Mineral Trioxide Aggregate (EndoSequence)

54
Q

In a Direct Pulp Cap procedure, what goes over the CaOH (Dycal) paste?

A

GI

55
Q

T/F
ASDOH Direct Pulp Cap Technique involved EndoSequence (CaOH), which takes 20 minutes to harden, then liner
(do not light cure - chemically sets)

A

True

56
Q

Principles of Class III design: _____ mm bevel

____ degrees

*bevel for color, lesion doesn’t include contact

A

1

45

57
Q

Class III minimal gingival separation:

A

1/2-1 mm

58
Q

T/F

The outline of a perfect Class III prep is a circle

A

False

*oblong increases retention, etc.

59
Q

An area of deep decay may require a ______ of _______

Brand name:

A

Liner

GI

GC Fuji II LC

60
Q

GC Fuji II LC provides ____ insulation, _____ release, and _____ resistance

A

thermal

fluoride

caries

61
Q

Etchant opens enamel _____ and allows resin to flow into the _______ to create ________ retention with resin tags

A

prisms

tubules

micro-mechanical

62
Q

What is the purpose for Etchant in Dentin?

A

Demineralizes, removes smear

*exposes collagen matrix which resins binds

63
Q

Bonding agent (OptiBond Solo plus) is ruined by what?

A

Water/moisture contamination

*re-apply

64
Q

What are the Diamond Football burs?

A

379 F and EF

*good for trimming lingual composites

65
Q

The scalpel used to trim interproximal composite:

A

12

66
Q

A surface reflecting back light of a different wavelength depending on the source describes what?

A

Metamerism

67
Q

What type of filling materials tend to be opaque?

What tend to be translucent?

A

Hybrid, heavily filled, macro particles

pure microfilled, nano-hybrids

68
Q

What color changes occur when a composite is cured? (2)

A

More translucent

Shifts to grays (decrease in tone/value)

69
Q

Class IV’s can be the result of habits, sports, time, and interesting stories

A

True

70
Q

The big composite instrument:

The little:

A

XTS #3

XTS Mini #1

71
Q

If the edge is translucent, use _______ shades

If the edge is opaque, use _______ shades

A

Enamel

Dentin

72
Q

When building _____ scaffold do not fold

When building _____ scaffold folding is optional

A

lingual

facial

73
Q

According to Dr Huang, the most commonly missed step in Class IV composites is what?

A

Drying and checking with explorer after pre-finishing

*don’t pre-finish well enough

74
Q

What zone preserves the dentin bond to composite?

A

Interdiffusion zone

75
Q

What bonding resin is the gold standard?

Brand?

A

4th generation

Bisco All Bond + D/E resin/OptiBond FL

*requires 5-6 applications

76
Q

C Factor =

High C factor means what?

A

bonded resin surface/un-bonded

shrinkage

77
Q

Because of polymerization shrinkage, darker shades need to be less than _____ mm thick

A

2

78
Q

5th Generation Bonding - what 2 steps?

A

Etch

OptiBond Solo plus

79
Q

OptiBond Solo plus has what in it that acts as an elastic layer?

A

Nano-filled particles

80
Q

6th Generation bonding is the best seller in the US and is called?

A

Clearfil SE (mod pH)

81
Q

7 Generation (Huang doesn’t recommend) is an all in one called what?

A

i-Bond, Xeno IV

82
Q

“Bonding” step has a ___ and a ____

A

GI

Conditioner (weak acid, removes smear)

83
Q

Aside from being technique sensitive (like Gen 4), 5th generation bonding (OptiBond solo +) is sensitive to what?

A

moisture

84
Q

Under-etching will inhibit ____ bonding

Over-etching will inhibit _____ bonding

A

Enamel

Dentin

85
Q

T/F

Ceramic is similar in hardness to quartz at 7 Mohs and both are harder than steel at 6.5 Mohs

A

True

86
Q

T/F

Polishing theory includes Scratch, Ductile flow, and Chemo-mechanical

A

True

87
Q

What is the measurable surface strain created by scratches during polishing?

A

Twyman effect

*different from poly shrinkage

88
Q

The Twyman Effect is large in _____ and ______ theory.

Small in _____.

A

Scratch, Ductile Flow

Chemo-mechanical

*b/c chemically react at surface for latter

89
Q

The Hammer Effect occurs in prefinishing with _____ burs

A

Carbide

90
Q

Diamond is _____ times harder than composite or carbide burs

A

1167

91
Q

T/F

Diamond burs w/o water create more heat/strain than carbide w/o water

A

True

92
Q

F and EF burs are ___ and ___ micron diamonds

A

30

15

93
Q

Soflex discs contain _____ oxide

A

alumina

94
Q

Polishing involves scratch theory

A

False

*Plastic ductile/chemo-mechanical

95
Q 
T/F
If resin (Glaze) is used in place of a final polish, your practice will suffer
A

True

Tim's Cards (140 decks)

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