When more than half of the tooth’s biting surface is damaged, a dentist will often use an inlags or onlags.
Inlags and Onlags can be made of porcelain, gold or composite resin. These pieces are bonded to the damaged area of the tooth. An Inlags, which is similar to a dental filling is used inside the cusp tips of the tooth. An Onlags is a more substantial reconstruction, similar to the inlags but extending out over one or more of the cusps of the tooth.
Traditionally, gold has been the material of choice for Inlags and Onlags. 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.