Abstract
Recently orthognathic surgery, to cope with jaw deformity, has become popular, and has been performed by many oral surgeons.
As a result of the progress of surgical techniques, it has been possible to treat a patient with severe jaw deformity with an excellent postoperative profile. But the cause of this disease has still not been discovered. We performed the following study to investigate the cause of jaw deformity. Sixteen patients who had facial asymmetry to transform their deformed jaws were the object of this study. The patients were divided into two groups. Group I-patients who had mid and lower face asymmetry and Group II-patients who had lower face asymmetry.
In our study, using computerized tomography, we found the following result, In 100% of Group I patients and 50% of Group II patients, the malposition of the chin was opposite the deformation from the temporal region to the occipital region. In other words the chin shifts in the opposite direction of the abnormal shape of the head, of person with jaw deformity.
