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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