Nyström E, Rosenquist J, Astrand P, Nordin T
J Maxillofac Surg. 1984 Dec;12(6):277-82. doi: 10.1016/s0301-0503(84)80259-3.
Positional changes of the mandible after oblique sliding osteotomy of the mandibular rami were investigated by means of cephalometric analysis. The patient material comprised 40 patients. Twenty patients were operated upon using an extraoral approach and 20 were operated on using an intraoral approach. The patients were followed up with lateral cephalograms for 18 months after operation. In both groups, a posterior rotation of the mandible took place during the fixation period. This rotation gave a further retro-displacement of gnathion and a shortening of posterior facial height. The incidence of patients with considerable posterior rotation of the mandible was higher in the intraoral than in the extraoral group. The difference between the means of the changes in the mandibular plane angle (dEO = 4.9 degrees, dIO = 6.3 degrees) of the groups was, however, not statistically significant. Nor was there any significant difference in relapse between the two groups after release of the fixation.
通过头影测量分析研究下颌支斜行滑动截骨术后下颌骨的位置变化。患者材料包括40例患者。20例患者采用口外入路进行手术，20例采用口内入路进行手术。术后对患者进行18个月的头颅侧位片随访。两组在固定期均出现下颌骨向后旋转。这种旋转使颏下点进一步向后移位，后面高缩短。下颌骨向后旋转明显的患者发生率在口内组高于口外组。然而，两组下颌平面角变化均值之间的差异（口外组dEO = 4.9度，口内组dIO = 6.3度）无统计学意义。固定解除后两组之间的复发情况也无显著差异。
