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| Extraction | Wisdom Teeth | Bonegraft | Sinus Lift | Ridge Augmentation | Nerve Reposition | Sedation Dentistry | Oral & Maxillofacial Surgery |
Sinus Lift
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:
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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.
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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.
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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.
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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.
Procedure
The oral surgeon will cut the gum tissue near your premolars and
molars. The tissue is raised, exposing the bone. A small,
oval window is opened in the bone. The membrane lining the
sinus on the other side of the window separates your sinus
from your jaw. This membrane is gently pushed up and away
from your jaw. Granules of bone-graft material are then
packed into the space where the sinus was. The amount of
bone used will vary, but usually several millimeters of bone
is added above the jaw.
Once the bone is in place, the
tissue is stitched closed. Your implants will be placed four
to nine months later, depending on the graft material that
was used. This allows time for the grafted material to mesh
with your bone.
Periotome for Sinus Lift
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