Crowns and bridges: A crown is a cap like structure placed over a tooth and a bridge is made to replace a missing tooth. There are various reasons why a bridge may be indicated on your teeth. 1. Missing tooth 2. Two or more successive root canal treated teeth 3. Missing teeth on either side of a natural tooth 4. Generalized attrition of teeth reducing the vertical height etc., In any of these situations you may be advised a bridge. The bridge involves capping 3 or more teeth. In case you have a missing tooth, to provide a bridge the dentist has to prepare the tooth behind and infront of the missing region. Therefore two teeth which are good, normal and healthy have to be prepared to receive a bridge. An intentional root canal treatment may be necessary sometimes on these teeth before they are prepared to receive a bridge. Hence we are compromising the health of 2 teeth to replac...