Herbst矫治器治疗安氏Ⅱ1下颌后缩儿童的头影测量研究
Herbst교치기치료안씨Ⅱ1하합후축인동적두영측량연구
Cephalometric roentgenographic study of Herbst appliance therapy on growing children with Class Ⅱ division 1 malocclusion and mandibular retrusion
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