1994 年 46 巻 1-2 号 p. 45-50
A prominent, gonialangle, so called benign masseteric hypertrophy, is rather common and considered to be unattractive feature in the Orient. A face with this kind of deformity can only be corrected surgically Though most of the procedures are performed intraorally, exposure of the operation site is often not large enough for osteoplasty to proceed safely. Since the definite indication of the site of osteotomy is needed, especially in a narrower operative field, a special instrument was deviced to perform safe and accurate mandibular angle osteotomy.
