If you have lost an entire arch of teeth (top and/or bottom), or are soon to have your remaining teeth removed because they are too unhealthy to save, you may be able to replace them with fixed dentures supported by dental implants.Dental implants serve the same purpose as the roots of natural teeth: anchoring the replacement teeth to your jawbone. Just like natural tooth roots, they lie under the gum line and therefore are not visible in the mouth. Only the lifelike prosthetic teeth attached to them (the fixed denture) can be seen by you or anyone else. Because dental implants are made of titanium, a metal that has the unique ability to fuse to living bone, they are extremely stable and reliable.