An implant-supported bridge is used when more than one tooth is missing. It also may be used when your dentist is concerned that you might put too much pressure on individual implants that are not connected to each other. For example, clenching or grinding your teeth can put a lot of pressure on individual implants. This can increase the chances that they will loosen from the bone and fail. An implant-supported bridge reduces the pressure on the individual implants in the bone, and spreads it across the entire bridge.