Crowns are synthetic caps, usually made of porcelain, ceramics or gold, which are placed on top of the tooth.

Crowns are typically used to restore function and appearance following a restorative procedure such as a root canal. Crowns are also used to restore a tooth that has become extremely decayed and will no longer withstand the forces of chewing without the full coverage of a crown. Crowns are used to attach bridges, cover implants, prevent a fractured tooth from becoming worse, or to replace an existing filling that is in jeopardy of becoming loose or dislocated.

Crowns may also serve an aesthetic purpose when applied to a discolored or stained tooth, to restore the tooth to its natural appearance.