【摘要】 目的:观察比较两组患儿治疗前后颌面部硬组织的变化 ,以了解使用口外弓矫治安氏 错牙合的最佳治疗时期。方法:通过 Kloehn口外弓推磨牙向后与 Edgewise矫治器联合应用于 7～ 8岁组与 10～ 11岁组安氏 错牙合患儿 ,对治疗前后 X线头影测量及模型测量进行分析比较。 结果 :发现 7～ 8岁组患儿上磨牙远移的距离大于10～ 11岁组的患儿 ,7～ 8岁组患儿上颌骨向前生长所受抑制较 10～ 11岁组明显 ,7～ 8岁组患儿替牙期选用口外弓的治疗效果较 10～ 11岁组为好。 结论 :使用口外弓矫治安氏 错牙合的最佳时期为 7～ 8岁。更多还原

【Abstract】 Objective: To explore the optimal treatment period by use of extraoral arch by comparison of the changes of facial hard tissue in treatment of angle Ⅱ\+Ⅰmalocelusion with kloehn’s extraoral arch and Edgewise appliance. Methods: A group of 7～8 year old children and a group of 10～11 year old children were selected including 16 angle Ⅱ\+Ⅰmalocelusion case in each group respectively. Data of cephalograms and model analysis were compared between pretreatment and posttreatment. Results: The more distance of maxillary molar and more obvious inhibition of maxilla bone growth forward in group of 7～8 year old children were detected than those in group of 10～11 year old children. Conclusion: More effective treatment by use of extraoral arch was detected in the period of 7～8 year old group than 10～11 year old group.更多还原