Inlays, Onlays and Veneers Flashcards
what is the difference between an inlay and an onlay
onlays include cuspal involvement/coverage or are a wide MOD
pros and cons to inlays compared to direct restorations
pros - superior materials and margins, wont deteriorate over time
cons - more time consuming and expensive
what is an indirect restoration and name 3 examples
restorations fabricated outside of the mouth by a technician in a lab
inlays, onlays, veneers, crowns , bridges
what are the 4 conventional clinical stages for indirect restorations
preparation
impressions
temporisation
cementation
ceramic vs gold inlay prep isthmus width minimum value
ceramic - 1.5-2mm
gold - 1mm
ceramic vs gold inlay prep depth minimum values
both 1.5mm
ceramic vs gold inlay prep chamfer minimum values
ceramic - 1mm
gold - 0.5mm
what cement can be used to cement ceramic inlays/onlays
NX3
composite based cement
what cement can be used to cement gold inlays/onlays
aquacem
GI luting cement
svensen gauge
used to measure tooth preparation using temporary restorations
how can a custom provisional restoration be created
using chemically cured bis acrylic composite resin i.e protemp
take a sectional impression using putty before carrying out prep
why are preformed provisional restorations not used that often in adults
require a large range of sizes to accomodate varying patients
unlikely to fit accurately and often require chairside alterations
however they may be good if no impression can be taken prior to prep e.g in trauma cases
can be metal or tooth coloured (think hall crowns)
name 5 reasons for a provisional restoration
restore aesthetics
stabilise occlusion
restore function
prevent bacterial entry into dentine
help with sensitivity - if dentine exposed
allow optimum home care
name 3 materials that may be used for preformed crowns
aluminium
stainless steel
polycarbonate
