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伴有上颌后缩的安氏Ⅲ类错(牙合),可在乳牙列和混合牙列期用前牵引和快速扩弓相结合的方法来矫治。作者旨在研究和分析两个年龄组患者的治疗效果。 本研究分两组进行,第一组患者5～8岁,第二组9～12岁,两组皆为10名女性,5名男性,均为反覆(牙合)、骨型Ⅲ类上颌后缩。患者在治疗前6个月(T_0)、治疗开始时(T_1)、治疗后6个月(T_2)摄头影测量片。T_2-T_1显示治疗期间的变化,T_1-T_0显示未治疗期间6个月的自然生长变化,比较T_2-T_1,T_1-T_0即可知道仅用治疗装置产生的效果。 患者采用Hyrax快速扩弓装置和Tubingor前牵引面框,每天戴12～14h,至少6个月,直到建立正常
Class Ⅲ malocclusion accompanied by maxillary retraction can be corrected by a combination of pre-traction and rapid expansion in the deciduous dentition and mixed dentition. The authors aim to study and analyze the effects of treatment in two age groups. This study was divided into two groups, the first group of patients aged 5 to 8 years, the second group of 9 to 12 years old, both groups were 10 women, 5 men, all repeated (occlusion), type Ⅲ maxillary Shrink The patients underwent surgery at the first 6 months (T 0), the beginning of treatment (T 1), and the second 6 months after treatment (T 2). T_2-T_1 showed the changes during the treatment. T_1-T_0 showed the changes of the natural growth during the 6 months without treatment. The effect of using only the treatment device can be obtained by comparing T_2-T_1 and T_1-T_0. Patients with Hyrax rapid expansion device and Tubingor front traction face frame, daily wear 12 ~ 14h, at least 6 months until the establishment of normal