DUAN Yu-chenga,WU Junb(a.2005 Grade of Medical Department of Graduate School;b.Department of Orthodontics,Affiliated Stomatological Hospital,Nanchang University,Nanchang 330006,China)
Abstract：Objective To evaluate the skeletal and dental changes for crowded class Ⅱ division 1 malocclusion and mandibular retrusion in permanent dentition extraction treatment with two-phase.Methods The investigation involved 15 patients treated with Herbst appli
2008, Vol. 50 