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d.b.review 2 > Resto > Flashcards

Resto Flashcards

1
Q

Affected dentin (2)

A

Subtransparent dentin

Transparent dentin

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2
Q

Infected dentin (2)

A

Turbid

Infected dentin

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3
Q

Affected dentin characteristics (3)

A

Dry leathery texture

Capable to remineralize

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4
Q

Infected dentin characteristics

A

Soft mushy or cheesy texture

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5
Q

Zone of carious enamel

A

Translucent zone
Dark
body
Surface

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6
Q

Zone of bacterial invasion

Presence of bacteria in tubules

A

Turbid dentin

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7
Q

Demineralized softened dentin but no bacteria in tubules

A

Transparent dentin

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8
Q

Outermost carious zone with numerous mo

A

Infected dentin

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9
Q

Enamel aka substantia ____
Inorganic:___
Organic:_____

A

Adamantina
96-98%
2-4%

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10
Q

Dentin aka substantia ____
Inorganic
Organic

A

Ebornea
70 inorg
30 organic

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11
Q

Cementum aka substantia ____
Inorganic:___
Organic:____

A

Ossea

50%50%

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12
Q

Grass like or bush like or ribbon like hypomineralize enamel arising from DEJ

A

Enamel tufts

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13
Q

Hypomineralize enamel arising from DEJ or outer surf longer than tufts

Hair like strands

A

Enamel lamellae

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14
Q

Extensions of odontoblastic processes of enamel

A

Enamel spindle

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15
Q

Similar to bone

A

Cementum

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16
Q

Loc where fastest progression of caries

A

Dej

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17
Q

Dead odontoblast with empty tubules are known as

A

Dead tracts

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18
Q

Bleaching lasts ….

A

6 mos to 1 yr

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19
Q

Process of setting of amalgam

A

Crystallization process

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20
Q

Corrosion by product of amalgam

A

Tin sulfide

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21
Q

High mercury in amalgam result to

A

Excessive expansion of amalgam

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22
Q

Mercury alloy ratio by weight

A

8: 5 old
1: 1 EAMES TECHNIQUE

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23
Q

Amalgam alloy less condensation force needed with faster working time

A

Spherical

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24
Q

Am alloy particle need more condensation and is easier to carve

A

Admixed

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25
Q

Am alloy need most amount of mercury

A

Irregular

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26
Q

Am alloy need least amount of mercury

A

Spherical

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27
Q

Am rxn strongest and corrodes least

Rxn bet ___ and ____

A

Gamma phase

Silver, tin

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28
Q

Second strongest phase of am rxn

With most numerous amalgam

A

Gamma one phase

Silver, mercury

29
Q

Weakest and softest am rxn

Prone to microporosities

A

Gamma 2 phase

Tin, mercury

30
Q

Seen in high copper am

A

Copper tin phase

31
Q

% of copper in low copper amalgam

A

<6% cu

Or <10% other source

32
Q

% of copper in high copper amalgam

A

> 9%-30%

10%- 30%

33
Q

Inc expansion of amalgam is rel to (5)

A 
Inc mercury
Short trituration time
Dec condensation pressure
Inc particle size
Moisture contamination
34
Q

Time dimensional change due to constant stress

A

Creep

35
Q

Contraction or expansion of a material

A

Dimensional change

36
Q

Formation of oxides

A

Corrosion

37
Q

A thin layer of corrosion at the top of resto

Loss of luster of amalgam

A

Tarnish

38
Q

Procedure wherein amalgam is rubbed

A

Mulling

39
Q

Common cause of amalgam chipping during carving

A

Carving when am hardened

40
Q

Continuation of trituration processg

A

Mulling

41
Q

Where there’s ditching of am resto, when it is indic for replacement

A

> 0.5 mm

42
Q

Distance from margin of mesial and distal wall to prox surf must not be less than

A

PM - 1.6 mm

Molar - 2 mm

43
Q

Most difficult tooth to adapt matrix band

A

Max 1st pm - mesial developmental depression

44
Q

Why is matrix band extended occlusally when restoring class 2 cavities

A

For overfilling

45
Q

Common tooth prone to accidental pulpal exposure

A

Md 1st pm

46
Q

Basic parts of handcutting instruments

A

Handle
Shank
Working end

47
Q

Non cuttting instrument

A

Nib

48
Q

Slightly curved chisel has _____ design

A

Wedelstaedt design

49
Q

Straight chisel is similar to ____

A

Carpenter’s chisel

50
Q

Chisel fam

A

CHAD

CHISEL
HOE
ANGLE FORMER
DISCOID AND CLEIOD

51
Q

Hatchet fam

A

HEG

hatchets
Excavators
GMT

52
Q

Composition of composites (3)

A

Filler part
Matrix
Coupling agent

53
Q

Most common matrix in composite

A

Bis gma - bisphenol A-glycidyl methacrylate

54
Q

For polishing composite
For amalgam
For gold

A

Aluminum oxide

Tin oxide

Iron oxide

55
Q

Setting of composites

A

Polymerization process

56
Q

Most common filler in composites

A

Colloidal silica

57
Q

Bis gma invented by

A

Bowen 1962

58
Q

Component of composites used to produce radiopacity (5)

A 
Barium
Zinc
Boron
Zirconium 
Yttrium
59
Q

Bis gma radiolucent or opaque

A

Radiolucent

60
Q

Disadv of polymerization

A

Shrinkage

61
Q

Inhibits polymerization (2)

A

Eugenol

Cavity varnish

62
Q

Ratio of bonded surface to the unbounded surfaces

A

Configuration factor

63
Q

Etch is discovered by

A

Buonocore 1955

64
Q

Which is better high or low c factor

A

Low c factor better

If high, shrinkage!!

65
Q

Longest c factor

A

Class 1

66
Q

Class of cavity with least C FACTOR

A

Class 4

67
Q

Enamel and dentin is etched true or false

A

True

68
Q

Etching (4)

A

Phosphoric acid
Edta
Maleic acid
Citric acid

69
Q

Retention for composite chemical or mechanical

A

Micromechanical

d.b.review 2 (21 decks)

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