Inlays Onlays and Veneers Flashcards
what are indirect restorations
fabricated in labs and then sent back to clinician to be cemented into patient’s mouth
what are the conventional stages of indirect restorations
preparation
temporisation
impression and occlusal records
cementation
what are the most common types of inlay
gold
composite
porcelain
when are inlays used
occlusal cavities
occlusal/ interproximal cavities
replace failed restorations
molars or premolars
low caries rate
advantages of inlays
better materials and margins
wont deteriorate over time
what are disadvantages of inlays
time
cost
what should the isthmus width be for an inlay with ceramic
1.5-2mm
what should the isthmus width be for gold inlay
1mm
what should the depth be for inlays
1.5mm
what should the chamfer margin be for ceramic inkay
1mm
what should the chamfer margin be for a gold inlay
0.5mm
what taper should the walls be for an inlay
6 degrees
what is an occlusal key or dove tail on a prep
aids in retention
why should tissue between the pulpal floor and proximal boxes be rounded
if they are too sharp this can be areas of stress when the patient bites down
how do you make a temporary restoration
take impression and occlusal recorsd and send to lab for restoration fabrication
what are alternative direct temporary restorations in inlays
kalzinol
GI
why should you avoid using direct GI in an inlay temp restoration
you have to cut it back out and risk preparing the tooth even further
what should you put on the lab card for inlays
pour impression
mount casts with the occlusal record (waxbite)
construct restoration (tooth, material, thickness, shade)
what are examples of cements used in ceramic inlays and onlays
NX3
ABC
RelyX
what are examples of cements used in gold inlays and onlays
AquaCem
Panavia
RMGI
what are onlays
they are like inlays but also extend over the cusps of the teeth
when would you use onlays
tooth has lost a lot of tooth tissue
remaining tooth tissue is weakened
MODs with wide isthmuses
when are cast metal indirect restorations indicated
higher strength needed
bruxist patients
for porcelain onlays what should the cusp reduction be
1.5mm for non working cusp
2mm for working cusp
for gold onlays what should the cusp reduction be
non working cusp 0.5mm
working cusp 1mm
what should the chamfer margin be for porcelain onlays
1mm
what should the chamfer margin be for gold onlays
0.5mm
when should you make temporary onlay restorations
immediately after preparation
what are the first clinical stages in indirect restoration fabrication
give LA if no RCT
make a reduction template
impression for temporary
prepare tooth
make temporary
cement temporary
what are the second clinical stages in indirect restoration fabrication
remove temp
isolate clean and dry prepared tooth
try-in, asses fit and occlusion
cement
minor occlusal adjustments
what are veneers
thin layer of cast ceramic that is bonded to the labial or palatal surface of the tooth with resin
indications for veneers
improve aesthetics
change teeth shape
correct peg shaped laterals
reduce or close interproximal spaces
what are causes of intrinsic staining
trauma
ageing
tetracyclines
non-vital teeth
what are contraindications of veneers
poor OH
high caries rate
gingival recession
root exposure
what is the preparation for veneers
putty index
depth cuts
what should the cervical reduction for a veneer be
0.3mm
slight chamfer margin
supragingival
what should the midfacial reduction for a veneer be
0.5mm
what should the incisal reduction for a veneer be
1-1.5mm
what two types of veneers do not require incisal preparations
feathered incisal edge
intra-enamel
what are the four types of veneer preparation
feathered incisal edge
incisal bevel
intra-enamel
overlapped incisal edge
what is the Gurel technique
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
if a temporary restoration is required for veneers what should you use
pre-op impression and temp materials
or spot bond composite veneer after etching only in the centre of the tooth
what should you do to prevent cement for veneers getting into the interproximal spaces
matrix strips around adjacent teeth and remove excess when cement not set with microbrushes
what occurs at the first appointment for a veneer
LA if necessary
putty index
impression for temp
tooth prep
get temp made
impressions, bite reg and shade
cement temps
what occurs at the second appointment for a veneer
remove temp
isolate clean and dry tooth
try in and asses fit and occlusion
cement
what are alternative to veneers
no treatment
microabrasion
penetrative resin restorations
direct composite restorations
crowns
what is microabrasion
putting etch on the tooth then taking a microabrasion bur and taking away soft enamel leaving the hard and sound enamel behind
