为实现面型改善和理想咬合的统一，需要对颌骨牵引方向进行正畸辅助调控和术后精细咬合调整。

To achieve ideal occlusal relationship and improved surface shape, orthodontic is especially important before and after DO.

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结论联合上颌前方牵引及快速扩大方法对颌骨垂直向控制较好，但对牙齿垂直向控制较差。

Conclusion vertical control was good in jaw bone and was not effective in dentition when applying maxillary protraction combined with rapid expansion.

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方法对81例颌骨骨折行坚固内固定术的病例进行探讨，其中59例术后加颌间牵引，22例不加颌间牵引。

Methods 22 cases among 81 accepted rigid internal fixation, the other 59 cases accepted rigid internal fixation and intermaxillary traction.

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