Inlays Onlays and Veneers

Question 1

what are indirect restorations

Answer 1

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

Question 2

what are the conventional stages of indirect restorations

Answer 2

preparation
temporisation
impression and occlusal records
cementation

Question 3

what are the most common types of inlay

Answer 3

gold
composite
porcelain

Question 4

when are inlays used

Answer 4

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

Question 5

advantages of inlays

Answer 5

better materials and margins
wont deteriorate over time

Question 6

what are disadvantages of inlays

Answer 6

time
cost

Question 7

what should the isthmus width be for an inlay with ceramic

Answer 7

1.5-2mm

Question 8

what should the isthmus width be for gold inlay

Answer 8

1mm

Question 9

what should the depth be for inlays

Answer 9

1.5mm

Question 10

what should the chamfer margin be for ceramic inkay

Answer 10

1mm

Question 11

what should the chamfer margin be for a gold inlay

Answer 11

0.5mm

Question 12

what taper should the walls be for an inlay

Answer 12

6 degrees

Question 13

what is an occlusal key or dove tail on a prep

Answer 13

aids in retention

Question 14

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

Answer 14

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

Question 15

how do you make a temporary restoration

Answer 15

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

Question 16

what are alternative direct temporary restorations in inlays

Answer 16

kalzinol
GI

Question 17

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

Answer 17

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

Question 18

what should you put on the lab card for inlays

Answer 18

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

Question 19

what are examples of cements used in ceramic inlays and onlays

Answer 19

NX3
ABC
RelyX

Question 20

what are examples of cements used in gold inlays and onlays

Answer 20

AquaCem
Panavia
RMGI

Question 21

what are onlays

Answer 21

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

Question 22

when would you use onlays

Answer 22

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

Question 23

when are cast metal indirect restorations indicated

Answer 23

higher strength needed
bruxist patients

Question 24

for porcelain onlays what should the cusp reduction be

Answer 24

1.5mm for non working cusp
2mm for working cusp

Question 25

for gold onlays what should the cusp reduction be

Answer 25

non working cusp 0.5mm working cusp 1mm

Question 26

what should the chamfer margin be for porcelain onlays

Answer 26

1mm

Question 27

what should the chamfer margin be for gold onlays

Answer 27

0.5mm

Question 28

when should you make temporary onlay restorations

Answer 28

immediately after preparation

Question 29

what are the first clinical stages in indirect restoration fabrication

Answer 29

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

Question 30

what are the second clinical stages in indirect restoration fabrication

Answer 30

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

Question 31

what are veneers

Answer 31

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

Question 32

indications for veneers

Answer 32

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

Question 33

what are causes of intrinsic staining

Answer 33

trauma ageing tetracyclines non-vital teeth

Question 34

what are contraindications of veneers

Answer 34

poor OH high caries rate gingival recession root exposure

Question 35

what is the preparation for veneers

Answer 35

putty index depth cuts

Question 36

what should the cervical reduction for a veneer be

Answer 36

0.3mm slight chamfer margin supragingival

Question 37

what should the midfacial reduction for a veneer be

Answer 37

0.5mm

Question 38

what should the incisal reduction for a veneer be

Answer 38

1-1.5mm

Question 39

what two types of veneers do not require incisal preparations

Answer 39

feathered incisal edge intra-enamel

Question 40

what are the four types of veneer preparation

Answer 40

feathered incisal edge incisal bevel intra-enamel overlapped incisal edge

Question 41

what is the Gurel technique

Answer 41

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

Question 42

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

Answer 42

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

Question 43

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

Answer 43

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

Question 44

what occurs at the first appointment for a veneer

Answer 44

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

Question 45

what occurs at the second appointment for a veneer

Answer 45

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

Question 46

what are alternative to veneers

Answer 46

no treatment microabrasion penetrative resin restorations direct composite restorations crowns

Question 47

what is microabrasion

Answer 47

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