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.
结论：1倾斜移动内收上颌组牙时，各个牙的牙槽嵴顶部和根尖部都有明显的应力集中区域。
Conclusions: 1 the stress is concentrated in alveolar bone crest and apex area of the maxillary anterior teeth while they are in tipping movement.
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