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Flashcards in Operative Test 4 Deck (95):
1

Composite =

Glass + Nalgene

(silica + Bis GMA)

2

Bis GMA has high _____ shrinkage

and limited ______ wear resistance

Polymerization

Occlusal

3

T/F
Compared to Amalgam, composites have larger Proximal Extensions

True

4

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

False

*NOT - only USC teaches

5

T/F
Retention points are needed in Class II composites

False

6

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

True

7

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

(Microhybrid, nano-composites, or microfilled)

Microfilled

*too brittle

8

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

Venus, Hurculite XRV (microhybrid)

Filtek, Premise (Nano-composite)

Helio-Molar (Highly filled composites)

9

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

Peroxide

10

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

Plastic

11

Flowable Composites are easy to apply but _______

have high polymerization shrinkage

12

Microfilled composited are highly polishable and have good transparency but _______

Poor fracture strength

13

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

plucked out

14

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

expensive

15

Flowable Composite brand:

Micro-hybrid brand:

Glass Ionomer (RMGI) brand:

Nano-composite brand:

Tetric Flow

Herculite XRV, Venus

GC Fuji II LC Capsule

Filtek, Premise

16

247 diamond is good for:

Groove anatomy

17

Composite Instruments are made from:

NIAlN

Nickel Aluminum Nitride

18

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

Sectional Matrix

*gets tighter contact more consistently

19

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

Composi-Tight 3Dfusion

20

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

BAC - benzylalkylchloride

21

What type of Bonding (generation) are we using?

What brand?

Gold Standard?

Brand?

5th Gen

Optibond Solo plus

4th Gen

All Bond

22

When can Chlorhexidine be added to restoration?

After etch, Pre bond

23

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

True

24

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

flowable

25

What is the smallest composite instrument called?

XTS Mini#1

26

What is the best Composite instrument for the occlusal?

XTS W-3

27

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

Heloimolar

28

Pre finish with:

Polish with:

Then Glaze, Check occlusion with Articulating Paper

Burs (must use water) and Instruments (DeMeo)

Discs

29

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

False

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

30

Infected Dentin has ______

Affected Dentin has ______

bacteria

bacterial by-products (and can re-mineralize)

31

Reparative Dentin, aka ________

Tertiary Dentin

32

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

20-40 days

*requires healthy pulp

33

What Growth Factor stimulates Tertiary (reparative) dentin?

TGF-B1

34

What is the critical pH for demineralization/remineralization?

5.5

35

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

Dentinal tubules toward pulp

36

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

re-mineralization

37

T/F
White spot lesions must be restored

False

*re-mineralized

38

Rapidly growing decay can be what color?

Same as Dentin

39

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

soft

moist

yellow

40

T/F
Chronic caries are leathery and Dark

True

41

Sclerotic Caries are what color?

Dark brown/black

*very firm, do not remove (not active)

42

T/F
Root caries tend to be dark/similar color to dentin

True

43

ICDAS:

International Caries Detection and Assessment System

44

ICDAS 0: (definitions)

ICDAS 1:

ICDAS 2:

ICDAS 3:

ICDAS 4:

ICDAS 5:

ICDAS 6:

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

ICDAS 0: (Tx)

ICDAS 1:

ICDAS 2:

ICDAS 3:

ICDAS 4:

ICDAS 5:

ICDAS 6:

Sealant

Sealant

Sealant

Sealant/PRR (or MIR)

MIR (minimally invasive restoration)

MIR

MIR

46

What ICDAS level has Optional Sealants?

Low Risk: 0, 1, 2

Moderate Risk: 0

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

47

Likelihood of cavitation: E1

E2

D1

D2

D3

0%

10.8%

??

40.9%

100%

48

What measures Fluorescence?

Diagnodent Laser

49

0.5% fuchsin in propylene glycol can delineate what?

Outer irreversibly denatured dentin

Inner reversibly affected dentin

(infected/affected)

50

When is the Incomplete Removal of caries justified?

*Indirect Pulp Cap (involved CHX and liner

No Hx spontaneous pain

Vital pulp

51

Thin layer CaOH or MTA:

Direct Pulp Cap

52

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

True

53

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?`

Zinc Oxide Eugenol

GI

CaOH paste

MTA - Mineral Trioxide Aggregate (EndoSequence)

54

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

GI

55

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

True

56

Principles of Class III design: _____ mm bevel

____ degrees

*bevel for color, lesion doesn't include contact

1

45

57

Class III minimal gingival separation:

1/2-1 mm

58

T/F
The outline of a perfect Class III prep is a circle

False

*oblong increases retention, etc.

59

An area of deep decay may require a ______ of _______

Brand name:

Liner

GI

GC Fuji II LC

60

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

thermal

fluoride

caries

61

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

prisms

tubules

micro-mechanical

62

What is the purpose for Etchant in Dentin?

Demineralizes, removes smear

*exposes collagen matrix which resins binds

63

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

Water/moisture contamination

*re-apply

64

What are the Diamond Football burs?

379 F and EF

*good for trimming lingual composites

65

The scalpel used to trim interproximal composite:

#12

66

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

Metamerism

67

What type of filling materials tend to be opaque?

What tend to be translucent?

Hybrid, heavily filled, macro particles

pure microfilled, nano-hybrids

68

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

More translucent

Shifts to grays (decrease in tone/value)

69

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

True

70

The big composite instrument:

The little:

XTS #3

XTS Mini #1

71

If the edge is translucent, use _______ shades

If the edge is opaque, use _______ shades

Enamel

Dentin

72

When building _____ scaffold do not fold

When building _____ scaffold folding is optional

lingual

facial

73

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

Drying and checking with explorer after pre-finishing

*don't pre-finish well enough

74

What zone preserves the dentin bond to composite?

Interdiffusion zone

75

What bonding resin is the gold standard?

Brand?

4th generation

Bisco All Bond + D/E resin/OptiBond FL

*requires 5-6 applications

76

C Factor =

High C factor means what?

bonded resin surface/un-bonded

shrinkage

77

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

2

78

5th Generation Bonding - what 2 steps?

Etch

OptiBond Solo plus

79

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

Nano-filled particles

80

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

Clearfil SE (mod pH)

81

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

i-Bond, Xeno IV

82

"Bonding" step has a ___ and a ____

GI

Conditioner (weak acid, removes smear)

83

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

moisture

84

Under-etching will inhibit ____ bonding

Over-etching will inhibit _____ bonding

Enamel

Dentin

85

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

True

86

T/F
Polishing theory includes Scratch, Ductile flow, and Chemo-mechanical

True

87

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

Twyman effect

*different from poly shrinkage

88

The Twyman Effect is large in _____ and ______ theory.

Small in _____.

Scratch, Ductile Flow

Chemo-mechanical

*b/c chemically react at surface for latter

89

The Hammer Effect occurs in prefinishing with _____ burs

Carbide

90

Diamond is _____ times harder than composite or carbide burs

1167

91

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

True

92

F and EF burs are ___ and ___ micron diamonds

30

15

93

Soflex discs contain _____ oxide

alumina

94

Polishing involves scratch theory

False

*Plastic ductile/chemo-mechanical

95

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

True

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