When multiple teeth are missing, there are various factors to consider. If the teeth are scattered throughout the mouth (or even several in one area) several single dental implants are the ideal solution. This approach is most like the natural situation of teeth in a jaw, so therefore is the best for long-term oral stability, maintenance, and health. However, if most of your arch is missing teeth, (with perhaps one back tooth on each side still intact), a different approach is possible. Five or more posts may be placed, and a bar is attached to them. The prosthesis (similar to a denture) snaps to the bar. This gives the stability that partials or dentures are unable to provide, since the bar is anchored to your jaw. Bone stays stimulated where the posts are located. Any bone loss does not cause the problems of "fit" for the partial or denture, since this type of prosthesis relies on implants for support instead of the bony ridge. Relining or adjustments are a thing of the past. The advantage of this method (called a "bar overdenture") over individual single implants is cost.
