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inlays and onlays
When more than
half of the tooth’s biting surface is damaged a
dentist will often use an inlay or onlay.
What are inlays and onlays?
Inlays and onlays can be made of porcelain, gold, or composite
resin. These pieces are bonded to the damaged area of
the tooth. An inlay, which is similar to a filling, 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.
Traditionally, gold has been the material of choice for
inlays and onlays. In recent years, however, porcelain
has become increasingly popular due to its strength and
color, which can potentially match the natural color of
your teeth.
How are
they applied?
Inlays and onlays require two appointments to complete
the procedure. During the first visit, the filling being
replaced or the damaged or decaying area of the tooth
is removed, and the tooth is prepared for the inlay or
onlay. To ensure proper fit and bite, an impression of
the tooth is made by the dentist, and sent to a lab for
fabrication. The dentist will then apply a temporary sealant
on the tooth and schedule the next appointment.
At the second appointment, the temporary sealant is removed.
Dr. Tannis will then make sure that the inlay or onlay
fits correctly. If the fit is satisfactory, the inlay
or onlay will be bonded to the tooth with a strong resin
and polished to a smooth finish.
Considerations
Traditional fillings can reduce the strength of a natural
tooth by up to 50 percent. As an alternative, inlays and
onlays, which are bonded directly onto the tooth using
special high-strength resins, can actually increase the
strength of a tooth by up to 75 percent. As a result,
they can last from 10 to 30 years. In some cases, where
the damage to the tooth is not extensive enough to merit
an entire crown, onlays can provide a very good alternative
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