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目的 :应用上颌前方牵引矫治器 ,矫治安氏Ⅲ类骨性错牙合。方法 :替牙期患儿 6例 ,恒牙列早期患儿 6例 ,并对替牙期恒牙列早期患儿的治疗效果进行X线颅影测量的分析比较。结果 :表明上颌前方牵引矫治器具有促进上颌骨向前发育、抑制下颌向前发育的作用 ,通过调整上下颌骨的相对位置关系 ,改善Ⅲ类面型 ,为今后取得良好的颅、颌、面谐调关系打下基础 ,而且两组治疗效果无显著差异。结论 :在临床上对安氏Ⅲ类错牙合患儿应用前方牵引的年龄选择上 ,不应局限于替牙期 ,恒牙列早期的患儿也完全可以应用。
Objective: To apply the maxillary distraction appliance to treat Class Ⅲ malocclusion. Methods: 6 cases of children with molars and 6 cases of early children with permanent dentition, and analyzed the results of X-ray computed tomography in the early stage of permanent dentition. The results showed that the maxillary mandibular traction appliance could promote the forward development of the maxilla and inhibit the forward development of the mandible. By adjusting the relative position of the maxilla and the mandible, the type Ⅲ surface was improved and the cranial, mandibular, Harmonious relations lay the foundation, but no significant difference between the two groups. CONCLUSION: The clinical application of anterior approach in children with Class III malocclusion should not be confined to the period of dentition, nor can the early stage of permanent dentition be fully used.