Inlays and onlays are dental restorations used to repair rear
teeth that have a mild to moderate amount of decay. They can also be
used to restore teeth that are cracked or fractured if the damage is
not severe enough to require a dental crown. Dental inlays are used
to treat teeth that have decay or damage within the top surface.
Onlays are used to treat decay that extends to one or more of the
cusps. Onlays protect teeth similar to crowns but conserve more
natural, healthy tooth structure. Onlays are sometimes called
partial or conservative crowns.
Inlays and onlays can be
made from gold, resin, or porcelain. They are stronger than
composite fillings, and more conservative than crowns since less
natural tooth is required to be removed during the treatment. Since
the margins are invisible, they do not need to be placed below the
gum line, which is healthier and easier on the gums. They are bonded
to the teeth to create a tight fit and restore the tooth strength.
Porcelain inlays and onlays wear better than composite fillings, and
are usually less expensive than crowns. And because they can be
created from tooth-colored materials, inlays and onlays are often
used to replace metal fillings for patients who desire a more
natural looking smile.