luxatio imperfecta dentis
牙冠伸长术 Crown Lengthening
牙根伸长 Root extension
牙齿伸长或压低 extrusion or intrusion
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牙体的运动趋势表现为牙根舌向移动、牙根远中倾斜和牙冠伸长的复合运动趋势。
The tendency of the maxillary incisor movement was a lingual-rooted, distal-rooted and extrude-crowned movement.
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