Although the outside of each tooth is made of strong and hard enamel, teeth can be chipped, broken or weakened due to:
An artificial crown is often the best way to save a tooth and strengthen it. It fits over the prepared existing tooth and replaces the natural crown.
A bridge replaces one or more missing teeth. It consists of an articifial tooth anchored to the adjacent natural teeth. If a tooth is lost through an accident, or is too badly decayed to save with a crown, a bridge may be the treatment of choice.
*(excerpt from ADA Crowns and Bridges pamphlet)