A dental crown is a covering for an existing tooth. It can improve the way a decayed or broken tooth looks and make it stronger and longer lasting. Crowns are usually made from porcelain or a mix of porcelain and metal.
Dental crowns can be used to cover a broken or decayed tooth when too much of the original tooth is missing to hold a filling. They are also used to protect a weak tooth from breaking, and to cover stained or badly shaped teeth.