GE Hong-shan a,ZHONG Rong-mei b(a.Department of Orthodontic,the Affiliated Stomatology Hospital;b.Journal Editorial Department of Medical College,Nanchang University,Nanchang 330006,China)
Abstract：Objective To investigate the soft tissue changes by treatment of extracting four first premolar in Class ⅡDivision l malocclusion in adolescent female.Methods 15 adolescent females with Class ⅡDivision l malocclusion were selected.They were treated by e
2009, Vol. 51 