Inlays and onlays can be made of porcelain, gold or composite resin which are bonded to the damaged area of the tooth. An inlay is similar to filling, which is used inside the cusp tips of the tooth. An onlay is 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 the recent years, porcelain become popular due to its strength and color, which potentially match the color of your teeth.

Inlays and onlays being bonded directly to the tooth using special high-strength resins can actually increase the strength of the tooth by up to 75%. As a result, they can last up to 10 to 30 years.