The effect of first molar loss on dentition periodontium and masticatory efficiency 青年人第一磨牙缺失对牙周牙列及咀嚼效率的影响
Position change of upper incisors and molars after extraction of first premolars in cases with Angle class I malocclusion and crowding A prim ɑ ry study of tre ɑ tment timing of Cl ɑ ss ⅰ crowing c ɑ ses in perm ɑ nent dentition 安氏Ⅰ类拥挤拔牙矫治后磨牙及切牙位置变化的研究
Objective To search the effect of first molar loss on dentition, periodontium and masticatory efficiency in young people. 目的探讨青年人第一磨牙缺失后对牙列、牙周及咀嚼效率的影响。