Implants prevent the hard and soft tissue collapse that can occur under conventional bridges and removable partial dentures. In patients who have lost all of their teeth, the lower one-third of the face is prone to collapse if implants are not placed to preserve the bone and the facial profile. Implants form a strong bond to the surrounding bone to provide support and anchorage for biting and chewing as well as stimulation for the bone to hold it in place.
Implant-supported crowns and bridges do not require neighbouring teeth for support. When teeth are replaced using traditional tooth-supported bridges, the teeth on either side of the missing tooth are ground down so that the bridge can be cemented onto them. This tooth structure can never be replaced. Removable partial dentures use clasps and rests which have to be carved onto adjacent teeth. As the partial rocks back and forth, it can loosen the teeth it depends on for anchorage, causing them to be lost.
Implants replace the entire tooth and the missing root so it is a free-standing restoration. This leaves more of your natural teeth untouched and free of restorations which save your natural teeth.