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indirect Restoration > Partial Veneer crown (including esthetic veneer), inlay and onlay > Flashcards

Partial Veneer crown (including esthetic veneer), inlay and onlay Flashcards

1
Q

Ex of when to use labial man or lingual max partial veneer crowns:

A

occlusion VD increase

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2
Q

inlay partial veneer crowns are traditionally made w :

A

metal alloys

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3
Q

Help w retention of partial veneer crown inlays:

A

pinholes small, thin holes, metal for strength in these regions

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4
Q

Partial veneer crown is aka:

A

Partial coverage crown

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5
Q

Surface usually not covered by partial coverage crown:

A

facial, ex: extracoronal metal resto

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6
Q

TF? 2 pin wedge is the most commonly used retention for PVCs:

A

F, but could be on boards

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7
Q

2 types of PVC to use in anterior:

A

3/4 crown, pinledge

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8
Q

2 types of PVC to use in pos:

A

3/4 crowns, 7/8 crowns

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9
Q

7/8 crown from where to where?

A

start from B groove toward D and around to MB cusp which should be intact for esthetics

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10
Q

Indications for 7/8 crown:

A

moderate tooth structure loss, retainer for fFDP, if B wall is intact and you don’t want to fully cover, inc VDO, establish new anterior guidance, perio involved teeth but want to keep, can splint instead of ortho

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11
Q

3/4 crown, retentive grooves or no?

A

yes, axial alignment retentive grooves

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12
Q

Placement of retentive grooves for 3/4 crown:

A

ML and DL (it looks like MB and DB on slide 4) check

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13
Q

PVC indications:

A

lost moderate tooth struc, intact B wall, retainer for FDP, for anterior, retainers to reestablish AG, to splint teeth where sufficient tooth struc present

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14
Q

PVC contraindications:

A

short cx crown (inadequate retention), retainers for long-span FDPs, endo treated teeth, active caries, pdd, poorly aligned teeth

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15
Q

Why are PVC contraindicated for misaligned teeth?

A

can’t align axial wall properly

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16
Q

Adv of PVCs;

A

conservation of tooth, red pulpal / perio insult, access to supra-gingival margins, access to margins for OH, easier cementation, seating and clean up, ability to pulp test on B surface

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17
Q

Disadv of PVC:

A

less retention/resistance than CCC, complicated prep bc of pinhole placement needing to be in proper POI, metal display

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18
Q

Reductions for 3/4 posterior crown:

A

same as CCC, Fun: 1.5mm, Non-Fun: 1mm, FunCB: 1.5mm, axial alignment grooves, chamfer margin

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19
Q

Molar 7/8 crown prep

A

Mesial 1/2 = 3/4 crown prep, D Complete crown prep

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20
Q

Groove placement molar 7/8 crown:

A

B groove, MB

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21
Q

Fxn of B groove being in the groove:

A

hide alloy, preserve MB cusp for esthetics

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22
Q

Materials that can be used for inlays:

A

metal alloy, ceramic, composite resin

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23
Q

form of onlay depends on:

A

amount of tooth loss, no sp way

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24
Q

Inlay-Onlay: Indications:

A

high esthetic demand (ceramic/ composite resin), replace moderate to large existing resto, fractures tooth/resto, mod to large 1’ caries

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25
Q

Less retentive, inlays/onlays or PVCs:

A

inlays/onlays

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26
Q

Can inlays/ onlays be used for FDP retainers?

A

no (what about #29?)

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27
Q

Direct composites, short term or long term restos?

A

short term

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28
Q

Why is there more retention for PVCs than inlays/ onlays?

A

PVCs have pinholes

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29
Q

if you are using metal FDP it is possible to use the only.

A

T. not inlay, because inlay creates a ledge that may break the cusp (don’t understand, check)

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30
Q

Inlay/ Onlay contraindications:

A

can’t isolate, bruxing, clenching, excessive wear, need for high R/R

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31
Q

Why are in / onays contraindicated for pt w parafunctional habits?

A

R/R form needed

32
Q

Adv of in / onlay

A

gold: low creep and corrosion resistance, more esthetic than amalgam w material choice, onlay: cuspal support, reducing risk of cuspal fracture, more conservative that full coverage

33
Q

Adv to metal alloy restos:

A

low creep and corrosion resistance

34
Q

Disadv, in/ onlays:

A

less conservative than direct, metal display, if used, risk of cuspal fracture for inlay

35
Q

Why is a direct resto more conservative than onlay?

A

must reduce more to get retention, more bulk is of material is needed for this, the walls must diverge to the occlusal as well for in / onlay for placement of indirect resto, leading to further reduction

36
Q

when using metal alloy for an inlay, this effect is created and can lead to fracture:

A

wedge

37
Q

Do we usually want to interproximal inlays on the lingual or labial side?

A

labial, to prevent discoloration, chipping, malformation

38
Q

conservative method of restoring the appearance and fxn of discolored, chipped, malformed, misaligned, too short or diastema of anterior teeth:

A

Porcelain laminate veneer

39
Q

Adv of PLV over full coverage Resto (FCR):

A

conservation of structure, marginal integrity of bonded enamel, gingival adaptation, esthetics

40
Q

TF? PLV can be cemented to cementum.

A

T. highly prefered to be cemented to enamel bc the porcelain is very biocompatible

41
Q

Diastemas under __mm can be closed via PLV:

A

6mm, ortho if larger

42
Q

Why can’t we close diastemas larger than 6mm?

A

wouldn’t have proper emergence profile, food impaction, neither direct nor indirect can fix

43
Q

Contraindications for PLV:

A

Bruxism, defective enamel (amelogenesis imperfecta), less than 50% remaining tooth structure or enamel, man incisors w steep overbite and ho horizontal overbite

44
Q

Reductions for PLV:

A

Facial: 0.3-0.5, chamfer margin as close to gingiva as possible, I edge red: none, 1mm, or 2mm

45
Q

Group 1 incisal edge reduction:

A

no reduction

46
Q

Group 2 I edge red:

A

2mm

47
Q

Group 3 I edge red:

A

1mm

48
Q

Veneer seating direction on prepped tooth:

A

don’t understand, these don’t resemble the 3 Groups mentioned in previous slide check

49
Q

Possible POI’s for PLV:

A

labial or incisal

50
Q

Prep steps PLV:

A

shade selection, depth cut, gingival plane: (012 bur held parallel to emergence profile of tooth, in enamel at gingival margin, 0.3mm), labial plane:: (red parallel to mid plane of tooth and extend M-D, 0.3-0.5mm, not extended into interproximal contacts, proximal prep: break contacts, end finish line before interprox contact, I edge: bur 90’, 1-2mm

51
Q

how can you end the finish line BEFORE the interproximal contact and still not be ablet o see the finish line from the M or D direction?

A

check? Slide 30

52
Q

Shape of prox prep for PLV:

A

Elbow shpaed

53
Q

Didn’t we, for FCC for incisors reduce the I edge at a 45’ angle to help create the halo of a nature tooth? WHy is iit different here?

A

check? slide 31

54
Q

Diagnostic and Cx steps of PLV:

A

Eval and dx cast, wax-up, duplicate dx wax-up, make ESF, mock up (auto-cure composite resin temp),

55
Q

What is a mock up?

A

autopolymerizing composite resin, to ESF, apply intraorally, show patients

56
Q

Material type for mock up:

A

auto-cure composite resin temp

57
Q

When to break contact when prepping PLVs:

A

diastema

58
Q

Tooth prep for PLV:

A

double cord w AlCl

59
Q

Should we be able tell which are which based on the image alone?

A

check slide 40

60
Q

Steps to making mock up for PLV:

A

apply vaseline w 1st cord is still in, autopolymerizing composite resin temp, thin at margin, remove ESF, apply flowable composite before taking off or it will break, trim excess,

61
Q

Steps to placing interim:

A

don’t etch tooth completely or else you won’t be able to remove, no adhesive, cement with flowable, remove excess, cure, modify for cleansability and esthetic form w carbide finishing burs, polish using resin polishing burs

62
Q

When to record impression to submit w cast to lab:

A

fom interim, w hydrocolloid

63
Q

Difference bw veneer and laminate veneer:

A

laminate - thinner layer, usually for esthetic improvement

64
Q

Material veneers can be made of:

A

composite resin, Feldspathic porcelain, leucite reinforced (Empress I), LiDi (e.max)

65
Q

How to select material type for veneer:

A

based on longevity, esthetics, strength, transparency of the material and the esthetics of the existing restoration (? why? check)

66
Q

Material type for heavy biter, not bruxism:

A

LiDi (e.max), stronger

67
Q

Veneer cements:

A

Total etch resin, Light cure, dual cur

68
Q

Ex of light cure or dual cure veneer cement:

A

Variolink II

69
Q

How to choose veneer cement:

A

Try-in pastes to observe shade BEFORE permanent cementation

70
Q

adjustments to be made on veneers before cementation

A

only interproximal contacts, no others

71
Q

How to adjust interproximal contacts of veneers:

A

porcelain polisher wheel

72
Q

Etch veneer w:

A

Hydrofluoric acid, time depends on material

73
Q

Steps to veneer cementation:

A

Try in paste to ensure proper color, adjust interproximal contacts if needed, etch veneer w hydrofluoric acid, silane coupling agent, etch tooth w phosphoric acid, adhesive resin to tooth, cement to veneer, interproximal strip in gingival embrasure to help with excess removal, seat, cure 2-3s each side, remove excess before completely curing, adjust as needed, polish, verify occlusion

74
Q

QUIZ!!! When to adjust occlusion for veneer:

A

after cementation, otherwise you will damage

75
Q

is using denture teeth in a PFD ever an option?

A

yes, but not esthetic, if space is minimal

indirect Restoration (54 decks)

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