Gomes M A, Wisth P J, Tornes K, Bøe O E
Department of Orthodontics and Facial Surgery, School of Dentistry, University of Bergen, Norway.
Int J Adult Orthodon Orthognath Surg. 1993;8(2):87-94.
Forty-five patients with mandibular retrognathism treated by surgical mandibular advancement by sagittal split osteotomies were evaluated cephalometrically before treatment at the intermaxillary fixation release, and 6 months postoperatively. The treatment resulted in appreciable improvement of the mandibular retrognathism, and the facial morphology was changed positively toward normal values. The mandibular prognathism was accomplished by an anterior displacement of the mandibular corpus and by a slight increase of the mandibular corpus length. The anterior facial height and the mandibular plane angle were increased by a clockwise rotation of the anterior segment and a counterclockwise rotation of the posterior segment, which consequently increased the gonial angle. These changes partly reversed during the postfixation period. Dentoalveolar changes were found in the position of the maxillary and mandibular incisors; both were uprighted, the mandibular incisors more than the maxillary incisors. In general, the long-term positive effects of the surgical mandibular advancement revealed great stability.
对45例采用矢状劈开截骨术进行下颌前徙手术治疗的下颌后缩患者，在治疗前颌间固定解除时及术后6个月进行了头影测量评估。治疗使下颌后缩得到明显改善，面部形态朝着正常值产生了积极变化。下颌前突是通过下颌体的前移和下颌体长度的轻微增加实现的。前面高和下颌平面角通过前段顺时针旋转和后段逆时针旋转而增加，从而使下颌角增大。这些变化在固定期后部分逆转。在上颌和下颌切牙的位置发现了牙槽变化；两者均直立，下颌切牙比上颌切牙更明显。总体而言，下颌前徙手术的长期积极效果显示出高度稳定性。
