目的　研究恒牙初期 1个及两个侧切牙同时反牙合对颌骨发育的影响。方法　通过X线头影测量对 76例恒牙初期侧切牙反牙合患者颅面硬组织形态选用DOWS分析法和Steiner分析法进行研究。结果　一个侧切牙反牙合对上颌骨发育无影响 ,对下颌骨发育有一定影响 ,而两个侧切牙同时反牙合时 ,上下颌骨发育有显著影响。结论　侧切牙反牙合宜早期进行矫治 Objective To study the effect of simultaneous anti-occlusion of one and two lateral incisors on the development of the mandible in the early stage of permanent teeth. Methods The morphology of craniofacial hard tissue in 76 cases of primary incisors with permanent incisors was studied by X-ray cephalometric analysis with DOWS and Steiner analysis. Results One lateral incisor anti-occlusal had no effect on maxillary development, which had some effect on mandibular development. However, both lateral incisors had significant effects on maxilla development when they were anti-occlusal simultaneously. Conclusions Occlusal incisors should be treated early