Abstract
This report deals with the results of a reversed L-shape osteotomy of the ascending ramus in cases of mandibular deformities. The presence of a small eminence on the lateral surface of the ramus opposite the mandibular foramen makes it possible to safely perform the osteotomy on the lateral surface without risking any damage to the nerve and vessels. This method has been applied in 18 cases of mandibular prognathism and one case of micrognathia and followed up during a period of 1–2 years. A good cosmetic and occlusal result could be observed in 18 cases. A slight open bite occurred in only one case of prognathism and it was because of the patient's negligence. A transient numbness of the lower lip occurred in three cases.
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