sinus-lift

A sinus lift is surgery that adds bone to your upper jaw in the area of your molars and premolars. It's sometimes called a sinus augmentation.

The bone is added between your jaw and the maxillary sinuses, which are on either side of your nose.

To make room for the bone, the sinus membrane has to be moved upward, or "lifted." A sinus lift usually is done by a specialist.

A sinus lift is done when there is not enough bone height in the upper jaw, or the sinuses are too close to the jaw, for dental implants to be placed. There are several reasons for this:
Many people who have lost teeth in their upper, Bone may have been lost because of periodontal (gum) disease. Tooth loss may have led to a loss of bone as well; the maxillary sinus may be too close to the upper jaw for implants to be placed.
Generally, the material which is used to add bone volume to the sinus floor is; Autogenous, biomaterials or both.