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operative 3 > class IV stuff > Flashcards

class IV stuff Flashcards

1
Q

what needs to match in tooth restorations

A

Shape
Surface texture
Color
Translucency

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2
Q

distal outline of central incisors shape

A

Slightly convex

more rounded on the mesial

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3
Q

distoincisal angle shape vs mesial of central incisors

A

distoincisal is more rounded

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4
Q

location of the crest of curvature of central incisors

A

in the incisal 1/3 close to the junction of the incisal and middle 1/3

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5
Q

what is the mesial outline of a central incisor

A

slightly convex to striatght

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6
Q

where is the crest of curvature of central incisors

A

in the incisal 3rd near the mesioincial angle

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7
Q

shape of the mesioincisal angle in central incisors

A

Sharp

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8
Q

are central incisors flat

A

No, 3 lobes with 2 concavities

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9
Q

should class 4 preps be preped ideally

A

No, should copy the opositng teeth

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10
Q

process of getting the shape of a tooth for class 4

A

follow outline
primary anatomy: line angles
secondary anatomy: surface changes in the tooth
tertiary anatomy: not smooth, but have perinkema

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11
Q

how do we determine the color of the teeth

A

Vita classic shade guide

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12
Q

3 dimensiosn of color

A

Hue
Chroma
Value

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13
Q

chroma

A

saturation/purity of color

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14
Q

Hue

A

color tone

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15
Q

Value

A

high value is light

low value is dark

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16
Q

hue for dentist

A

Color category of the dentinal body

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17
Q

Chroma for the dentist

A

Color saturation of the dentinal body

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18
Q

VAlue for the dentist

A

The degree of whiteness of enamel

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19
Q

A in shade guide

A

Red-brown

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20
Q

B in shade guide

A

Red-yellow

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21
Q

C in shade guide

A

greyish

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22
Q

D in shade guide

A

Red-grey

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23
Q

when shoudl shade matching be done

A

Before the teeth are exposed to dehydration

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24
Q

what happens to teeth when dehydrated

A

become lighter and does not return for 30 minutes of rehydration

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25
Q

in the vita system what happens are you increase in number

A

VAlue becomes more dark and chroma becomes greater

26
Q

what does enamel do for the look of a tooth

A

Shape
Surface texture
Modifies dentin color

27
Q

what does the dentin do for the tooth

A

Gives it color
Opacity
lobues
fluorescence

28
Q

what happens to the optical properites of resin

A

are affected with time and water uptake, especially if not completely cured

29
Q

Final resin shade depends on

A

Color of underyling tooth
thickness
Polymerization (yellow-blue, opaque)
finish and polish

30
Q

what does opacitiy do

A

how much of the tooth blocks the black inside the mouth

31
Q

what happens if you over whiten the tooth

A

eeth become black/grey because the dentin looses color

32
Q

roll of fluoresnce of a composite

A

absorbs light slighty, and in dark can transmit a glow (big deal in clubs and makes tooth look life like

33
Q

can patients tell small color differences in teeth

A

not nearly as well as dental professionals

34
Q

what thickens as you go incisal on a class IV prep

A

enamel becomes thick

35
Q

what happens to thickness as you go gingival on a class IV prep

A

more dnetin seen and less enamel

36
Q

why do teeth look poly chromatic

A

different thickness of enamel and dentin

37
Q

color change in not completed cured resin

A

yellow-> translucient due to photo-initiator going away

38
Q

composite and moisture

A

abosrbs water, and tooth looks whiter without water

39
Q

why might a tooth be dehydrated over time

A

rubber damn

40
Q

do you always need to finish and polish composites

A

yes

41
Q

what shouldnt be used when resotring class 3 and 4

A

wedges, BBL3 and 8A

42
Q

how important is color mathcing

A

not needed for biological success, but needed for esthetic success

43
Q

why do composites fail today

A

B/c of the densist (not the correct composite, bad technique

- last a long time anteriorly if correctly used

44
Q

location of the CEJ for Central lateral Canine

A

High low high

45
Q

oral-facial estheics

A

the maxillo-mandibular relationship to the face and the dental idline to the face pertaining to the teeth, mouth and gums

46
Q

Oral estheics

A

the relation of the lips to the arches, gingiva and teeth

47
Q

Dentogingival esthetics

A

the relationship of the gingiva to the teeth collectively and individually

48
Q

Dental esthics

A

MAcro and micro dental esthetics

49
Q

what is a negative space

A

the area that lacks something

50
Q

Type 1 smile restoration

A

Only restorative (no changes in tooth positiong giniva and bike)

51
Q

type 2 smile resotration

A

Crown lengthening (move ginvia)

52
Q

type 3 smile restoration

A

Cr restorative (Change bite, increase VDO)

53
Q

type 4 smile restoration

A

IMplant restorative (add bone implants)

54
Q

type 5 smile restoration

A

Ortho (move tooth positions)

55
Q

type 6 smile restoration

A

orthognatic restorative (move arch, faical profile)

56
Q

how to do smile restoration

A

transfrom to type 1 first

57
Q

pros of porcelain laminate veneers

A

Porcelain laminate veneers (excellent aesthetics, long durability)

58
Q

cons of porcelain laminate veneers

A

Need to remove teeth
temporization often needed
cannot be repaired
expensive

59
Q

pros of direct composite veneers

A

Conservative
inexpensive
excellenct esthics
No need to draw for prep

60
Q

cons of direct composite veneers

A

operatior skill

less durable

operative 3 (4 decks)

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