展示了牙齿拥挤、反颌、前突、开颌等异常情况。牙齿可以自由排列。

Shows the crowded teeth, anti-jaw, protrusion, jaw opening and other anomalies. Free arrangement of teeth.

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展示了牙齿拥挤、反颌、前突、开颌等异常情况和矫治的方法。 使用的是普通托槽。

Shows the crowded teeth, anti-jaw, protrusion, jaw opening and other anomalies and treatment methods.

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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。

Objective:To evaluate the maxillary expansion effects of posterior crossbite patients treated with elastic wrapping bite guard and screw expansion mechanic in the mixed dentition.

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