Nakajima T, Kajikawa Y, Tokiwa N, Hanada K
J Oral Surg. 1979 Jan;37(1):21-5.
Fifty cases of skeletal Class III malocclusion were analyzed by the tracings of presurgical and postsurgical cephalograms to evaluate the stability of the mandible a year after surgery. In 33 patients, the curved oblique osteotomy in the ascending ramus was used; the correction was made in the mandibular body for 17 patients by either the rectangular osteotomy or the sliding osteotomy. Minimal relapse was observed in all three procedures, with the least amount occurring after mandibular body ostectomy or osteotomy. The results were considered to be due to careful determination of the correct time for surgery in each patient to avoid skeletal relapse resulting in continued mandibular growth, prompt osseous healing at the surgical sites by providing close and tight bony contact between the segments, elimination of the effect of the major muscles of mastication, minimum alteration in the position of the posterior segment and trimming of the margin of the anterior segment to form a proper gonial angle, and a stable occlusion with maximum intercuspation and an adequate overbite. In addition, preoperative orthodontic treatment and extraoral traction of the mandible by chin cups were considered effective means to stabilize the post-operative occlusion.
通过术前和术后头颅侧位片的描记，对50例骨性III类错牙合患者进行分析，以评估术后一年下颌骨的稳定性。33例患者采用升支弧形斜行截骨术；17例患者通过矩形截骨术或滑动截骨术在下颌体进行矫正。所有三种手术方式均观察到最小程度的复发，下颌体截骨术或截骨术后复发量最少。结果被认为是由于在每位患者中仔细确定正确的手术时间以避免因下颌骨持续生长导致的骨骼复发，通过使骨段之间紧密贴合以促进手术部位的骨愈合，消除咀嚼肌的影响，后段位置改变最小以及修整前段边缘以形成合适的下颌角，以及实现最大牙尖交错和足够覆牙合的稳定咬合。此外，术前正畸治疗和使用颏兜进行下颌骨口外牵引被认为是稳定术后咬合的有效手段。
