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骨性安氏Ⅲ类错牙合是临床中较为常见的一种错牙合畸形。据最近的研究显示 ,在骨性安氏Ⅲ类错牙合中有 42 %～ 6 3 %的患者含有不同程度的上颌骨发育不足因素[1 ] 。在应用前方牵引器、颏兜、ＦｒａｎｋⅢ等矫治骨性安氏Ⅲ类错牙合的方法中 ,普遍认为前牵引可以早期矫治上颌骨?
Malignant Class Ⅲ malocclusion is clinically a common malocclusion. According to recent studies, 42% to 63% of patients with skeletal Class III malocclusion have varying degrees of maxillary hypoplasia [1]. In the application of the front traction, chin pocket, Frank Ⅲ and other treatment of skeletal Class Ⅲ malocclusion method, it is generally believed that the early traction can be the early treatment of the maxilla?