To repair damage involving over ½ of the tooth’s biting surface, rather than using a simple filling, or a crown, a dentist will often use an inlay, or an onlay.

Inlays and onlays, can be porcelain, gold, or composite resin cast sections that are bonded to the damaged area of a tooth. An inlay is similar to a filling and lies inside the cusp tips of the tooth; an onlay is a more extensive reconstruction that covers one or more cusps of a tooth.

Inlays and onlays are both traditionally made of gold; however, porcelain is now becoming the material of choice because of its strength and potential to match the natural color of your tooth.

Inlays and onlays are applied in two dental visits. At the first visit, the old filling, or decay, is removed, and the tooth is prepared for the inlay / onlay. The dentist will then make an impression of the tooth, and send this impression to a dental laboratory. This impression will be used by the laboratory to construct, a porcelain, or gold inlay / onlay that will fit exactly into your tooth. At this time the dentist will place a temporary sealant on your tooth and schedule a second appointment.

At the second visit, the temporary sealant is removed. Your dentist will then ensure that the inlay / onlay fits properly in the tooth and does not interfere with your bit. Once correctly fit, the inlay / onlay is bonded into the tooth with a strong bonding resin, and polished smooth.


Typically fillings can reduce the strength of the tooth by up to 50%. Inlays and onlays, however, because they are bonded directly into the tooth with special resins, can actually increase the strength of the tooth by up to 75%; as a result, they can last from 10-30 years, and in some cases, provide a good alternative to a crown.

Porcelain Inlays

If you feel self-conscious smiling broadly or laughing out loud, because you have dark, unattractive old fillings, then we have a simple painless solution for you. Today, porcelain inlays are an ideal alternative to conventional silver or composite fillings.

Silver amalgam fillings make teeth appear gray, and old composite bonding tends to chip and discolor over time.

Inlays are fillings that are made by a highly trained dental technician in either porcelain or "artglass."

Inlays are extremely strong and long lasting, and they restore and protect the tooth against further fracture.

Porcelain and artglass materials have been used for years in the fabrication of crown and bridgework, providing natural tooth color and translucency.

Porcelain and artglass inlays like those you see at the bottom of this page match your own tooth color, and are virtually indistinguishable from natural teeth.

Almost any silver or gold filling can be replaced with a beautiful porcelain or artglass inlay. If you don't want anyone to see fillings in your mouth, then inlays are an esthetic and enduring alternative!

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