【摘要】 目的:应用计算机及WINCEPH软件测量X线头颅定位侧位片,探讨不同术式治疗骨性安氏III类错效果的稳定性。方法:62例骨性安氏III类错患者36例接受下颌升支矢状劈开术(sagittal split ramus osteotomy,SSRO),26例接受下颌升支垂直骨切开术(intraoral vertical ramus osteotomy,IVRO),分别在手术前(T0)、手术后1个月(T1)、手术后6个月(T2)、手术后18个月以上(T3)拍摄头颅定位侧位片,利用计算机测量其各个阶段12个测量点矢状向变化,进行统计学分析。结果:SSRO术后出现与手术目的相反方向的复发;IVRO术后出现与手术目的相同方向的移位,无明显差异。结论:SSRO和IVRO方法各有其优缺点,术后移位率无明显差异,临床上选择哪一种术式应该根据患者具体情况来确定。更多还原

【Abstract】 Objective To compare the stability after orthognathic operation with two surgical techniques in patients suffered skeletal Class III malocclusion by winceph and standardized lateral cephalograms. Methods 62 patients accepted standardized lateral cephalograms at the following stages : T0 : before operation ; T1 : 1 month after surgery ; T2 : 6 months after surgery ; T3 :18 months after surgery. We measured the alteration at anteroposterior axes of 12 different test points and performed statistical analysis by compute. Results Reverse recurence against original destination was observed after surgery with SSRO surgical technique, while IVRO surgical technique companied with recurence at the same direction of the operation. Conclusion There were their advantages and disadvantages in two orthognathic surgical techniques. Variability of recurence rates were not significant after these two surgical techniques.So it would be chose suitable operative techniques according to patient’s condition in clinical practice.更多还原