Osseous Grafts or “Bone Grafts”
Bone loss in the jaws and around the teeth can be the result of missing teeth, periodontal disease, or trauma. This bone loss is more than a detriment to oral health and function; it can also alter facial appearance as the support for the natural contours of the face is diminished.
When a tooth is extracted, the natural stimulation to the underlying bone that is generated by the forces of biting or chewing is lost. In fact, bone width can be reduced by as much as 25% in the first year following tooth loss.
With grafting procedures, the dental bone can be restored to its original dimensions to maintain facial esthetics, repair the damage caused by periodontal disease as well as facilitate the success of procedures such as the placement of dental implants. A bone graft provides a platform or “scaffolding” for new bone growth and the material for a bone graft can be derived from the patient, other donor sources or be comprised of synthetic, bone-like materials.
There are several types of grafting procedures that can be performed with the particular approach depending upon the needs of the case.
A bone graft can be placed immediately upon the extraction of a tooth or some time after tooth loss. Placing a bone graft at the time of tooth removal reduces the amount of bone loss in the area to maintain the hard tissue support that is required for the future placement of a dental implant. When a bone graft is placed awhile after tooth loss, a separate surgical procedure is required to reflect the soft tissue, expose the underlying bone, place a graft and then suture the soft tissue back into place.
For patients lacking a sufficient amount of bone for a dental implant to replace a maxillary back tooth (upper back tooth), a procedure known as a “sinus lift” may be performed. During this surgical procedure, the sinus membrane is lifted and bone graft material is added between the jaw and the floor of the sinus to provide the needed bone height to successfully support a dental implant.
In addition to bone grafting for purposes of ridge preservation or augmentation to allow for dental implants, an aesthetic ridge augmentation procedure to restore the natural contours of the bone is sometimes performed in preparation for fixed bridgework to achieve a more cosmetically pleasing result.
To guide tissue regeneration as well as protect the graft and promote healing, special membranes and biologically active materials may be placed over the grafting material.
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