Inlays and onlays
An inlay is a custom-made piece of porcelain that fits snuggly into a prepared cavity. The inlay is then bonded to the tooth, which restores its shape and structure.
An onlay also is a custom-made porcelain piece that fits over a damaged portion of a tooth.
An onlay may be used to cover fractured or broken teeth or an area where a previously done restoration has failed or started to wear away.