Are a way of replacing missing teeth by placing crowns on teeth adjacent to the space and then joining them with a false tooth in between. This is made in the laboratory and then cemented into place with special adhesives. The bridge is then a permanent fixture in the mouth.
Bridges are possible if you have enough strong teeth with good bone support. They are usually made of porcelain bonded to precious metal, however new advances in materials allow for a stronger porcelain to be used without the need for a metal base. These bridges are slightly more aesthetic in appearance.