Crowns and Bridges are Fixed Partial Dentures are dental prostheses which are permanently fixed and cannot be removed by the patient. Fixed Partial dentures can be of several types:
Crowns are single covers placed on a single tooth. More than 90 per cent of the crowns are made for teeth that have undergone root canal treatment. Other indications for crowns include fractured teeth, decayed teeth, as well as in some cases to prevent food getting in between teeth.
Bridges are Fixed partial dentures used to replace missing teeth where teeth on either side of the gap are used as support
Materials used to fabricate Crowns and Bridges Metal
Full Metal crowns are made using various metal alloys such as Titanium or Cobalt Chromium Alloy, Palladium and even Gold is being used to fabricate Metal Crowns. The biggest advantage of metal crowns is the less tooth preparation is required. Metal crowns have high strength and durbality and their attrition is less when compared to other materials. The main disadvantage of Metal Crowns is the metallic appearance. They are best suited for posterior teeth.