[Prevention of peroperative complications of sagittal osteotomy of the ascending ramus of the mandible].

The orthognathic surgery is daily used through the world but it is not without risks. The authors make a review of the principal peroperative complications that may occur during a sagittal osteotomy of the mandibular ramus. They show that definite gestures can help to avoid and to reduce the frequence of the complications of this surgery.