What is a Sinus Lift?
The maxillary sinuses are behind your cheeks and on top of 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 bone to hold them in place. When the sinus wall is very thin, it is impossible to place dental implants in this bone.
The key to a successful and long-lasting dental implant is the quality and quantity of jawbone to which the implant will be attached. If bone loss has occurred due to injury or periodontal disease, a sinus augmentation 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 in the floor of the maxillary sinus above the bony ridge of the gum line that anchors the teeth in the upper jaw. By strengthening and growing bone in this location, dental implants can be placed and secured in the new bone.
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 jaw.
- are missing a significant amount of bone in the back of your jaw.
- are missing teeth and have a vastly enlarged maxillary sinus cavity.
- are missing most of the maxillary teeth, but require support for dental implants.
How is this Oral Surgery Accomplished?
In the most common sinus augmentation procedure, a small incision is made on the premolar or molar region to expose the upper jawbone. A small opening is cut into the bone (a window as it is often described) and the membraneous lining of the sinus is pushed upward and inward thus tenting up the membrane and creating a space. The underlying space is filled with bone grafting material, either from your own body, a cadaver, or another source. Sometimes, synthetic materials that can imitate bone formation are used. After the grafting material has been implanted, the bony window is covered with a membrane and the initial incision is stitched up allowing the healing process to begin. After several months of healing, the bone becomes incorporated into the rest of the patient’s jaw and dental implants can be inserted and stabilized in this new sinus bone.
If enough bone between the upper jaw ridge and the bottom of the sinus is available to stabilize the implant well, sinus augmentations and implant placement can sometimes be performed as a single procedure. If not enough bone is available, the sinus augmentation will have to be performed first, then the graft will have to mature for several months, depending upon the type of graft material used. Once the graft has matured, the implants can be placed.
The sinus graft makes it possible for many patients to have dental implants when years ago there was no other option besides wearing loose dentures.
A sinus augmentation is generally performed at Dr. Anderson‘s office, under local anesthesia. However, some patients also may request oral or intravenous sedative medication as well.