随着外科正畸手术的广泛开展,下颌支垂直截骨术在治疗真性下颌前突中得到较普遍开展。现将我们四年多来开展该类手术的临床体会讨论如下; With the extensive development of surgical orthodontic surgery, mandibular vertical osteotomy in the treatment of true mandibular prognathism has been more common. Now we have more than four years to carry out the clinical experience of such operations are discussed below;