Implant dentistry.. One of the; latest methods to replace a missing tooth by a fixed replacement apart from the conventional bridge is by implants. Implant is a metallic structure which is surgically placed in the jaw bone to give a crown or bridge on top. The implant is placed in the jaw and after a few months of its insertion can the replacement be given - single, multiple or all teeth. The success and the selection of the patient depends most on the density of the supporting bone.