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目的通过观察骨性Ⅲ类错矫治前、后头影测量的变化以及各年龄组矫治完成的时间及疗效,评价上颌前方牵引联合快速扩弓矫治的效果。方法选择59例患儿,分为乳牙期组、替牙早期组、替牙晚期组进行矫治,均先进行快速扩弓,然后行前方牵引,三组治疗前后摄头颅定位侧位片进行分析。结果治疗完成后,除无法配合者外,均达到满意效果,治疗前后结果差异有统计学意义。结论上颌前方牵引联合快速扩弓矫正早期骨性Ⅲ类错可刺激上颌骨前移,使下颌骨向下、向后旋转,使反得到满意的矫正。
Objective To observe the changes of cephalometric changes before and after correction of skeletal Class Ⅲ malocclusion and the time and effect of the treatment in each age group and evaluate the effect of maxillary anterior traction combined with rapid augmentation correction. Methods Fifty-nine children were selected and divided into two groups: primary teeth group, early teeth group and late teeth group. All of them were rapidly expanded, and then were towed in the front. The cranial positioning flaps of the three groups before and after treatment were analyzed. Results After the treatment was completed, except those who could not cooperate with each other, they all achieved satisfactory results. The differences between before and after treatment were statistically significant. Conclusion Anterior maxillary traction combined with rapid protraction of skeletal Class Ⅲ malocclusion can stimulate the maxillary advancement, so that the mandible can rotate downwardly and backwardly, which can be satisfactorily corrected.