Inlays and Onlays: A Conservative Middle Ground

Between a Filling and a Crown

Inlays and onlays are sometimes called indirect fillings because they are crafted outside the mouth and then bonded into place. They are typically used on back teeth with moderate decay or damage, where a standard filling might not be strong enough but a full crown would remove more healthy tooth than necessary.

Understanding the Difference

An inlay fits within the grooves and hollows of the chewing surface, sitting inside the cusps, or raised points, of the tooth. An onlay extends further to cover one or more cusps. Because of this, onlays are sometimes described as partial crowns.

Both are usually made from tooth-colored ceramic or composite resin, though gold remains an option for some patients. Ceramic restorations can be matched closely to the shade of your natural teeth.

What to Expect

Treatment begins by removing decay or a failing filling and shaping the tooth. A precise impression or scan is taken, and a temporary restoration may protect the tooth while the inlay or onlay is fabricated. At the next visit, the final piece is checked for fit and bonded securely to the tooth.

Why Patients Choose Them

Inlays and onlays are durable, fit precisely, and can reinforce a weakened tooth while keeping more of it intact. With regular brushing, flossing, and checkups, they can serve well for many years. If you are curious whether this approach suits one of your teeth, Dr. McGuffie is happy to talk it through at your next visit.