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 the air spaces on either side of your nasal cavity. 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, and can be done in the office under local anesthesia.