Implants are devices that replace the roots of missing teeth, and are used to support crowns, bridges or dentures. Implants are placed in your jawbone surgically. Most of the time, implants feel more natural and secure than other methods of replacing missing teeth, such as dentures. The key to the success of all implants is a process called osseointegration, in which the bone in the jaw bonds with the implant. Titanium is a special material that the jawbone accepts as part of the body.