Result: The profile improved slowly more than half a year in maxillary protraction treated group.
结果：前方牵引后侧貌改善较慢，一般需半年以上。
Objective To evaluate the maxillary protraction appliance permanent teeth combined rapid expansion of early bone anterior crossbite effectiveness.
目的评价前方牵引器联合快速扩弓矫治恒牙早期骨性前牙反牙合的有效性。
Conclusion vertical control was good in jaw bone and was not effective in dentition when applying maxillary protraction combined with rapid expansion.
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。
Objective To investigate the changes of hard tissue changes in vertical dimension when applying maxillary protraction combined with rapid maxillary expansion.
目的研究联合应用上颌前方牵引及快速扩大对硬组织垂直向的作用。
To investigate the therapeutic effects of maxillary expansion and protraction in the primary dentition.
探讨在乳牙期利用固定扩弓矫治器前牵引的临床效果。
To investigate the therapeutic effects of maxillary expansion and protraction in the primary dentition.
探讨在乳牙期利用固定扩弓矫治器前牵引的临床效果。
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