A crown is a permanent restoration that is made of metal (gold), porcelain with a metal core or all porcelain. Crowns are used when the tooth either has a large decay, broken/fractured, been root canal treated, severely discolored or misaligned teeth. They restore function and provide full coverage support of the tooth.
Bridge (fixed partial denture)
A bridge or a fixed partial denture is permanent restoration that is made of either metal (gold) or porcelain with a metal core or a combination. Bridges replaces one or more missing teeth by using adjacent teeth for support.