Crowns are a type of restoration that is fixed onto those teeth that have lost a major portion of their structure. There are many kinds of crowns available that range from all porcelain to all metal. Your dentist will explain the details regarding the benefits and drawbacks of each type.
The procedure of crown fabrication involves steps that start from the preparation of the tooth/teeth, followed by the recording of an impression of the involved teeth, and then placing a temporary crown or a bridge to your teeth. The impressions are sent to the laboratory where a cast of the teeth is poured and the process of permanent crown fabrication commences. The finished work is sent back to the dental office; after carrying out a thorough assessment and required alterations if any, the crown is bonded to your teeth.
Bridges, also known as a fixed partial dentures, on the other hand are dental restorations used to replace one or more missing teeth by joining permanently to adjacent teeth or dental implants. Bridges typically match the color of your natural teeth and are cemented on the supporting teeth called abutments. A replacement tooth, called a pontic, is attached to the dental crowns that cover the abutments. In some cases fixed dental bridges are placed on a dental implant next to your missing teeth. Types of dental bridges may vary depending on how they are fabricated and the way they are anchored to the adjacent teeth.