When a tooth has a large cavity, then a resin filling may not be enough to restore a tooth to provide proper shape and strength. A crown, or cap, is placed on top of a tooth to prevent further damage that cannot be removed. Crowns are made of porcelain fused to metal, porcelain, or gold. Depending on the situation (i.e. strength, appearance, and position of tooth in the mouth), the dentist will advise which is the most appropriate material for the tooth.
When a patient is missing one or more teeth, an option to restore the missing teeth is a dental bridge. A bridge is a series of crowns attached to one another held by more than one tooth. A bridge is also cemented and cannot be removed by the patient.