Objective To investigate the changes of soft and hard tissues after extraction space closure with micro-screw implant as orthodontic anchorage.
目的研究以微螺钉为支抗，用直丝弓矫治器滑动法关闭拔牙间隙后的软硬组织变化。
Objective To investigate the indication, treatment methods and effects in cases with missing maxillary incisors by means of orthodontic space closure.
目的探讨正畸关闭间隙法治疗上切牙缺失的适应症，矫治方法及临床效果。
Objective To investigate the indication, treatment methods and effects in cases with missing maxillary incisors by means of orthodontic space closure.
目的探讨正畸关闭间隙法治疗上切牙缺失的适应症，矫治方法及临床效果。
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