Sinus Lift & Bone Grafts
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Bone Graft Surgery
Bone Grafting is the replacement or augmentation of the portion of the jaw bone that anchors the teeth. It’s a surgical procedure that’s often done to reverse the loss or resorption of bone that may have occurred due to tooth loss, trauma, disease or ill-fitting dentures; and to rebuild the bone structure beneath the gums in preparation for the placement of dental implants or other tooth replacements.
When a bone graft is implanted in the jaw, it doesn’t just simply fill a void in the bone; it may also help promote new bone growth in that location. When successful, bone grafting can restore both the height and width of your jawbone. Bone grafts are placed with material provided from “Bone banks” and it is a procedure that helps you get Dental Implants when your jawbone is shrinking.
Healthy jawbone structures are critical for tooth retention and good oral health, as well as for aesthetic reasons. When bone is missing, or of poor quality, teeth don’t function, feel or look as well as they should, or may even fall out. When teeth are missing, the mouth area of the face eventually loses structure, a cause for concern for most patients.
Some of the reasons why teeth bone in the jaw may be missing or of poor quality include: Disease, Trauma, Developmental deformity or Previous dental procedures.
The following are some of the most common factors that may contribute to jawbone deterioration and loss, thereby needing the need for a bone graft procedure that potentially may restore shape and function to the jaw:
Tooth removal may involve bone loss. Natural teeth are embedded in the jaw bone and attached via a root structure which, depending on the location and size of the tooth, varies in size, shape and complexity. Bone tissue is maintained by putting stress or load on it through the periodontal ligament; activities such as biting and chewing stimulate the root structure, which in turn stimulates the bone that the root is attached to.
Periodontal (gum) disease is an infection that affects the tissue and bone supporting the teeth. It begins when the bacteria in plaque (a sticky, colorless film that forms on teeth) causes the gums to become inflamed.
Gingivitis is often caused by inadequate oral hygiene, and is reversible with professional treatment and good oral care.
Dentures and bridgework may appear to correct the problem of missing teeth, at least in terms of appearance and function, but most are not designed to mimic a natural tooth’s ability to stimulate bone material in the jaw.
Some dentures are supported and held in place by implants, which may provide sufficient stimulation for preserving bone health. With bridgework, the anchoring teeth on each side of the bridge undergo added stress from biting but also continue to stimulate the underlying bone; however, the bone structure under the portion of the bridge that spans the gap where teeth are missing receives no direct stimulation.
Unanchored dentures rest on top of the gum line and provide no direct stimulation from the alveolar bone. This type of denture depends on support from the gums and, especially, the underlying bone structure to keep it in place. As bone resorption progresses, patients often report that their dentures become progressively looser and do not fit as well as they did when they first started wearing them. After several years, bone and gum tissue may shrink to a point where new (or relined) dentures and even denture adhesives cannot provide adequate retention.
For those who do wear dentures, proper care, repair and refitting is critical for maintaining good oral health.
If a tooth is knocked out or broken off to the extent that no biting surface is left (below the gum line), bone stimulation stops. Some common forms of tooth/jaw trauma include:
Misalignment issues may create an environment within the mouth where certain tooth structures no longer have an opposing tooth structure. The unopposed tooth may over-erupt, leading to deterioration of the underlying bone.
When back teeth (molars) are removed from the upper jaw (maxilla), air pressure from the maxillary sinus (an air cavity in the body of the maxilla) causes resorption of the bone that formerly held the teeth in place. As a result, the sinuses become enlarged, a condition called hyperpneumatized sinus, which basically means “sinus with an increased air space.”
Sinus Lift Surgery
A sinus-lift procedure is a surgical procedure, to augment bone mass in the top jaw (maxilla), which increases the likelihood of successful placement of dental implants.
A sinus lift, sometimes called a sinus augmentation, is a 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 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.
One important reason of why you would need a sinus lift is that 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.
Sinus lifts have become common over the past 15 years as more people are getting dental implants to replace missing teeth.
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