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 layer of bone separating the maxillary sinus and the tooth site. Dental implants need an adequate amount of bone to hold them in place. When the sinus floor is very low, it is impossible to place dental implants in this bone without injuring the sinus cavity unless a sinus lift is performed.
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. 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 or in patients where the sinus cavity is too low to allow for a dental implant. The procedure seeks to grow bone in the floor of the maxillary sinus. This enables dental implants to be placed and secured in the new bone growth thus avoiding the sinus cavity as it has been raised to a new position with the placement of the bone graft.
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 most of the upper teeth and require support for dental implants
- have a sinus that is positioned low, close to where the tooth was present
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 into the bone, and the membrane lining the sinus is pushed upward. The underlying space is filled with bone grafting material. After the bone is implanted, the incision is sutured and the healing process begins. After several months of healing, the 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 the implant, 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 up to several months. Once the graft has matured, the implants 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.