A sinus lift (a sinus augmentation) is surgery that adds bone
to your upper jaw in the area of your molars and premolars to make it taller.
The bone is added between your jaw and the maxillary sinuses, which are on either side of your nose.
To make room for the bone, the sinus membrane has to be moved upward, or "lifted."
A sinus lift usually is done by an
oral and maxillofacial surgeon or a
periodontist.
It can happen that there is no longer enough bone in the molar area of the
maxilla in the direction of the floor of the sinus because of the bone atrophy after tooth loss.
As bone augmentation in this region is possible only with difficulty, a method was developed in
which the floor of the sinus is raised and bone is inserted into the cavity produced,
without injuring the mucosa of the sinus, which leads to an effective increase in the bone in the molar maxillary region.
This operation is called a sinus lift. This operation can be carried out under local anaesthesia
and is done through the mouth so that there are no scars on the face. The sinus lift operation can often be done at the
same time as the insertion of dental implants. The bone material which is inserted corresponds
to that described already for bone augmentation.
A sinus lift is done when there is not enough bone in the upper jaw, or the sinuses are too close to the jaw,
for dental implants to be placed. There are several reasons for this:
Many people who have lost teeth in their upper jaw — particularly the molars teeth — do not have
enough bone for implants to be placed. Because of the anatomy of the skull, the back of the upper jaw has less
bone than the lower jaw.
Once teeth are gone, bone begins to be resorbed (absorbed back into the body). If teeth have been
missing for a long time, there often is not enough bone left to place implants.
The maxillary sinus may be too close to the upper jaw for implants to be placed. The shape and the size of
this sinus varies among individuals. In addition, the sinus can get larger as you age.
Bone may have been lost because of periodontal (gum) disease.
Dental implants have gained popularity for treating edentulism, but some patients develop jaw atrophy,
which leaves insufficient bone for implants. To treat these patients, the sinus lift procedure, which augments bone,
was developed. Altered anatomy from this procedure has an unusual radiographic appearance,
confusing those unfamiliar with it. We describe the sinus lift procedure and its radiographic appearance.
