【摘要】 目的　观察上颌骨牵引成骨术矫治上颌牙弓狭窄的疗效。方法　对 10例成年患者行上颌LeFortI型截骨术 (不移动骨块 ) ,并手术截开腭中缝骨联结。以上颌快速扩弓装置 (6 4|4 6带环 ) ,每日打开螺旋 4次 ,共 1 0mm。其中 2例行单侧扩大牙弓 ,矫正上颌单侧牙弓宽度不足。利用计算机图形数据分析系统对扩弓前后的后前位头颅定位片进行测量 (上颌骨、上颌牙弓基骨、上颌后牙间的宽度 )并通过上颌前部咬合片观察腭中缝的打开情况及新骨的形成。结果　上颌牙弓扩大能在短时期内完成。上颌骨、上颌牙弓基骨、上颌后牙扩大量分别达到 3 84mm、3 2 5mm和 5 6 1mm。X线片显示 ,2～ 3个月时新骨充满打开的骨缝 ,完成上颌骨宽度的增加。上颌后牙有不同程度的颊向倾斜移动。结论　通过手术辅助的方法 ,以牙齿做支抗 ,行上颌骨宽度牵引成骨术可获满意的临床疗效更多还原

【Abstract】 Objective To study the methods and effects of distraction osteogenesis for correction of maxillary constriction Methods 10 cases (5 males, and 5 females, aged 16 33 years, average 19 6) were treated by distraction osteogenesis for correction of maxillary constriction Le Fort I osteotomy and palatal suture osteotomy for the upper jaw were made before opening of the Hyrax screw expander Totally four times of opening the screw a day were performed. 2 cases were expanded unilaterally The AP head films were analyzed using Image and Database Analysis System (IDAS) before and after expansion Results ①Expansion of upper arch was achieved done within a few days, and the maxilla, maxillary dental base and the posterior teeth were expanded as much as 3 84 mm, 3 25 mm, and 5 61 mm respectively ②The new bone was formed between the opened suture in two weeks, and filled the suture in 2 to 3 months ③Maxillary teeth tipped bucally a little bit Conclusions Distaction osteogenesis rapid maxillary expansion could get a good result following Le Fort I and palatal suture osteotomy for correction of maxillary constriction更多还原