Objective:To evaluate the maxillary expansion effects of posteriorcrossbite patients treated with elastic wrapping bite guard and screw expansion mechanic in the mixed dentition.
目的：探讨弹性包绕式垫加螺旋扩弓器矫治替牙期后牙反的适用性及治疗前后的牙颌结构变化。
2
Objective:To study character mandibular movement tracings during mandibular protrusion in patients with unilateral posteriorcrossbite and compare the difference with normal occlusion.
目的：探讨单侧后牙反牙合髁突前伸运动轨迹的特征并比较与正常牙合之间的差异。
3
Results (1)Dental arch transverse discrepancy was seen in 60.4% , bilateral posteriorcrossbite in 33.3% , and unilateral posteriorcrossbite in 16.7% of patients with UCLP, respectively .