An
inlay is similar to a filling and is used inside
the cusp tips of the tooth. An onlay is a more
substantial reconstruction, similar to the inlay
but extending out over one or more of the cusps
of the tooth.
Inlays and onlays can be made of porcelain,
gold, or composite resin. Porcelain inlays mimic
enamel's translucency and color, making them attractive
choices for patients. Gold alloy inlays and onlays
possess greater durability and better resist tarnishing
and corrosion.
Benefits of Dental Inlays and Onlays:
Increase the strength of a tooth with
respect to fillings
Alternative to an entire crown when teeth
damage is not extensive
Porcelain inlays/onlays does not change
color over time
Onlays and Inlays
Types
Description
Before
After
Inlays are used inside
the cusp tips of the tooth
Onlays extend out over one or more
of the cusps of the tooth
An
inlay is similar to a filling and is used inside
the cusp tips of the tooth. An onlay is a more
substantial reconstruction, similar to the inlay
but extending out over one or more of the cusps
of the tooth. 
