改良上颌前部骨切开术 Modified anterior maxillary segmental osteotomy
这种入路到达斜坡的方向稍有倾斜，但是其显露的宽度与双侧上颌骨切开术相比不相上下。
That approach to the clivus is slightly oblique, but can provide as wide an exposure as is achieved with the approaches involving a bilateral maxillotomy.
目的：探讨上颌前部阶段性骨切开术联合正畸治疗上颌前突的方法。
Objective to evaluate the effect of anterior maxillary segmental osteotomy (AMSO) combined with orthodontic treatment for maxillary protrusion.
方法采用上颌前部骨切开术，结合术前、术后的固定正畸方法联合治疗。
Methods Apply a combined treatment of osteotomy on the anterior part of maxilla coupled with the method of fixing rectification of deformation before and after the surgery.
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