Inlays, Onlays and Veneers Flashcards
what are indirect restorations
restorations fabricated outside mouth by technician
crowns, post and cores, bridgework, inlays, onlays, veneers
what is the 4 stages for indirect restorations
preparation
temporisation
impressions and occlusal records
cementation
what are inlays and what types are there
intra-coronal restorations made in lab
gold, composite, porcelain
uses of inlays
occlusal/interproximal cavities
replace failed restorations
minor bridge retainers
indications for inlays
premolars/molars
occlusal
MO or DO
MOD if kept narrow
low caries rate
adv and disadv of inlays
superior materials and margins
do not deteriorate
time
cost
inlay preparation
ceramic
1.5-2mm isthmus
1.5mm depth
1mm shoulder/chamfer
gold
1mm isthmus
1.5mm depth
0.5mm chamfer
what are onlays and what types are there
extra-coronal restoration made in lab
cuspal coverage
gold, composite, porcelain
indications for onlays
sufficient occlusal tooth surface loss [still cusp remaining]
remaining tooth substance weakened
uses for onlays
tooth wear
fractured cusps
restoration of RCT
replace failed restorations
minor bridge retainers
less destructive than crowns
onlay preparation
porcelain
non working cusp 1.5mm reduction, working cusp 2mm reduction
1mm shoulder
gold
nwc 0.5mm, wc 1mm reduction
0.5mm chamfer
what is a veneer and what types are there
porcelain laminate veneer
thin layer of cast ceramic that is bonded to labial or palatal surface of tooth with resin
ceramic, composite, gold
indications for veneers
improve aesthetics
change teeth shape/contour
correct peg laterals
reduce or close proximal spaces or diastemas
align labial surface of instanding teeth
types of discolouration and how it occurs
intrinsic;
non-vital, ageing, trauma, medication, fluorosis, hypoplasia/hypomineralisation, amelogenesis imperfecta, erosion/abrasion
extrinsic - staining not amenable to bleaching
contraindications to veneers
poor OH
high caries rate
gingival recession
root exposure
high lip lines
if extensive prep needed
labial positioned
severely rotated
overlapping teeth
extensive TSL/insufficient bonding area
heavy occlusal contacts
severe discolouration
preparation for veneers
cervical - 0.3mm
midfacial - 0.5mm
incisal - 1-1.5mm
types of veneer preparations
feathered incisal edge
incisal bevel
intra-enamel
overlapped incisal edge
what is the name of the veneer prep which is minimal preparation
Gurel technique
