Sinus Lift
The maxillary sinuses are hollow, air-filled spaces above the back teeth of the upper jaw and inside the cheek.

The maxillary sinuses are hollow, air-filled spaces above the back teeth of the upper jaw and inside the cheek. If the back teeth of the upper jaw are lost for any reason, the sinus cavities can sag downwards and some bone volume may be lost. This becomes a problem when implant treatment is planned, because there is not enough bone tissue. For long-lasting, successful implant treatment, the bone in these areas can be increased with a sinus lift so that new bone forms. It is the most commonly used bone augmentation procedure for patients with bone loss in the back of the upper jaw.
