Bridges are the most conventional way of replacing missing teeth with restorations that are not removable. If a tooth is missing, the teeth adjacent to the space are prepared for crowns. A multiple tooth restoration, called a fixed bridge, is then cemented to the prepared teeth with the false tooth "bridging" the gap between the teeth. For bridges to be a reasonable alternative for replacing teeth, the adjacent teeth must have solid bone support to withstand the extra stress that they bear on behalf of the missing tooth. Another alternative for replacing missing teeth with a fixed restoration is Dental Implants.