上颌单颌拔牙矫治成人安氏Ⅱ1错(牙合)的回顾性研究
상합단합발아교치성인안씨Ⅱ1착(아합)적회고성연구
The retrospective study of treatment the adult Angle's class Ⅱ division Ⅰ malocclusion with the single maxillary extraction orthodontics
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