Porcelain and Onlays, Crowns, Bridges
Crowns, inlays and onlays are dental restorations that are placed in or over a tooth when conservative restorations such as bondings are not enough to restore form or function to a tooth. Inlays and onlyas are like a partial crown, usually made of porcelain. An inlay usually replaces a filling, while an onlay covers more tooth surface - it typically replaces a filling and covers one or more of the cusps of the tooth and may cover the entire biting surface.
A bridge is a custom-made artificial tooth that fills in the gap where a tooth or teeth are missing, and attaches to the two teeth on either side.