What is a sinus lift?
The maxillary sinuses are behind your cheeks, above the upper teeth. These sinuses are empty, air-filled spaces. Some of the roots of the natural upper teeth extend up into the maxillary sinuses. When these upper teeth are removed there is often just a thin wall of bone separating the maxillary sinus and the mouth. Dental implants need adequate bone to hold them in place, and the sinus wall is very thin, it is impossible to place dental implants in the area.
The key to a successful and long-lasting dental implant is the quality and quantity of jaw bone to which the implant will be attached. If bone loss has occurred due to injury, tooth loss or periodontal disease, a sinus augmentation, or sinus lift, can raise the sinus floor and allow for new bone formation. A sinus lift is one of the most common bone grafting procedures for patients with bone loss in the upper jaw. The procedure seeks to grow bone between the floor of the maxillary sinus and the bony ridge that anchors the teeth in the upper jaw. This enables dental implants to be securely placed in the new bone growth.
Am I a candidate for a sinus lift procedure?
A sinus lift may be necessary if you:
- are missing more than one tooth in the back of your upper jaw
- are missing a significant amount of bone in the back of your upper jaw
- are missing teeth in your upper jaw due to a birth defect or condition
- are missing most of your teeth and require support for dental implants
How is a sinus lift accomplished?
Most commonly, a small incision is made on the premolar or molar region to expose the jaw bone. A small opening is made in the bone, and the membrane lining the sinus is gently moved upward. The underlying space is filled with bone grafting material, either from your own body or from other sources. Sometimes, synthetic materials that imitate bone formation are used. After the bone is implanted, the incision is closed and the healing process begins. After several months of healing, the added bone becomes part of the patient’s jaw, and dental implants can be inserted and stabilized in the newly-formed sinus bone.
If enough bone between the upper jaw ridge and the bottom of the sinus is available to sufficiently stabilize an implant, sinus augmentation and implant placement can sometimes be performed as a single procedure. If sufficient bone is not available, the sinus augmentation will be performed first and the graft will have to mature for up to several months, depending upon the type of graft material used. Once adequate healing has occurred, the implant can be placed.
The sinus graft makes it possible for many patients to have dental implants that previously had no other option besides wearing loose dentures.