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BDS3 Operative Dentistry > Inlays Onlays and Veneers > Flashcards

Inlays Onlays and Veneers Flashcards

1
Q

what are indirect restorations

A

fabricated in labs and then sent back to clinician to be cemented into patient’s mouth

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2
Q

what are the conventional stages of indirect restorations

A

preparation
temporisation
impression and occlusal records
cementation

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3
Q

what are the most common types of inlay

A

gold
composite
porcelain

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4
Q

when are inlays used

A

occlusal cavities
occlusal/ interproximal cavities
replace failed restorations
molars or premolars
low caries rate

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5
Q

advantages of inlays

A

better materials and margins
wont deteriorate over time

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6
Q

what are disadvantages of inlays

A

time
cost

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7
Q

what should the isthmus width be for an inlay with ceramic

A

1.5-2mm

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8
Q

what should the isthmus width be for gold inlay

A

1mm

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9
Q

what should the depth be for inlays

A

1.5mm

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10
Q

what should the chamfer margin be for ceramic inkay

A

1mm

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11
Q

what should the chamfer margin be for a gold inlay

A

0.5mm

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12
Q

what taper should the walls be for an inlay

A

6 degrees

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13
Q

what is an occlusal key or dove tail on a prep

A

aids in retention

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14
Q

why should tissue between the pulpal floor and proximal boxes be rounded

A

if they are too sharp this can be areas of stress when the patient bites down

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15
Q

how do you make a temporary restoration

A

take impression and occlusal recorsd and send to lab for restoration fabrication

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16
Q

what are alternative direct temporary restorations in inlays

A

kalzinol
GI

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17
Q

why should you avoid using direct GI in an inlay temp restoration

A

you have to cut it back out and risk preparing the tooth even further

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18
Q

what should you put on the lab card for inlays

A

pour impression
mount casts with the occlusal record (waxbite)
construct restoration (tooth, material, thickness, shade)

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19
Q

what are examples of cements used in ceramic inlays and onlays

A

NX3
ABC
RelyX

20
Q

what are examples of cements used in gold inlays and onlays

A

AquaCem
Panavia
RMGI

21
Q

what are onlays

A

they are like inlays but also extend over the cusps of the teeth

22
Q

when would you use onlays

A

tooth has lost a lot of tooth tissue
remaining tooth tissue is weakened
MODs with wide isthmuses

23
Q

when are cast metal indirect restorations indicated

A

higher strength needed
bruxist patients

24
Q

for porcelain onlays what should the cusp reduction be

A

1.5mm for non working cusp
2mm for working cusp

25
Q

for gold onlays what should the cusp reduction be

A

non working cusp 0.5mm
working cusp 1mm

26
Q

what should the chamfer margin be for porcelain onlays

A

1mm

27
Q

what should the chamfer margin be for gold onlays

A

0.5mm

28
Q

when should you make temporary onlay restorations

A

immediately after preparation

29
Q

what are the first clinical stages in indirect restoration fabrication

A

give LA if no RCT
make a reduction template
impression for temporary
prepare tooth
make temporary
cement temporary

30
Q

what are the second clinical stages in indirect restoration fabrication

A

remove temp
isolate clean and dry prepared tooth
try-in, asses fit and occlusion
cement
minor occlusal adjustments

31
Q

what are veneers

A

thin layer of cast ceramic that is bonded to the labial or palatal surface of the tooth with resin

32
Q

indications for veneers

A

improve aesthetics
change teeth shape
correct peg shaped laterals
reduce or close interproximal spaces

33
Q

what are causes of intrinsic staining

A

trauma
ageing
tetracyclines
non-vital teeth

34
Q

what are contraindications of veneers

A

poor OH
high caries rate
gingival recession
root exposure

35
Q

what is the preparation for veneers

A

putty index
depth cuts

36
Q

what should the cervical reduction for a veneer be

A

0.3mm
slight chamfer margin
supragingival

37
Q

what should the midfacial reduction for a veneer be

A

0.5mm

38
Q

what should the incisal reduction for a veneer be

A

1-1.5mm

39
Q

what two types of veneers do not require incisal preparations

A

feathered incisal edge
intra-enamel

40
Q

what are the four types of veneer preparation

A

feathered incisal edge
incisal bevel
intra-enamel
overlapped incisal edge

41
Q

what is the Gurel technique

A

minimal preparation technique
take impression and send off to lab - lab sends back a mock up and you can put this on the patients teeth to see what teeth may require a bit more preparation

42
Q

if a temporary restoration is required for veneers what should you use

A

pre-op impression and temp materials
or spot bond composite veneer after etching only in the centre of the tooth

43
Q

what should you do to prevent cement for veneers getting into the interproximal spaces

A

matrix strips around adjacent teeth and remove excess when cement not set with microbrushes

44
Q

what occurs at the first appointment for a veneer

A

LA if necessary
putty index
impression for temp
tooth prep
get temp made
impressions, bite reg and shade
cement temps

45
Q

what occurs at the second appointment for a veneer

A

remove temp
isolate clean and dry tooth
try in and asses fit and occlusion
cement

46
Q

what are alternative to veneers

A

no treatment
microabrasion
penetrative resin restorations
direct composite restorations
crowns

47
Q

what is microabrasion

A

putting etch on the tooth then taking a microabrasion bur and taking away soft enamel leaving the hard and sound enamel behind

BDS3 Operative Dentistry (6 decks)

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