...，大于60g 小于350g ③轻力（light force） -乳胶橡皮圈，小于60g 2、 牙移动的类型（名词解释） 倾斜移动(tipping movement):牙冠与牙根作相反方向移动（最常见）。 整体移动(bodily movement)：牙冠与牙根作相同方向等距离移动。
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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.
然后在各模型上进行模拟加载，分析倾斜移动和整体移动时各模型牙周膜初应力的分布情况。
Then, load to these already established models to analyze the initial stress of PDL in these models when tipping and bodily movement respectively.
将骨重建过程与有限元分析相结合，对尖牙在一个治疗周期内的倾斜移动过程进行模拟并得到各阶段的应力分布。
With combining bone remodeling with finite element analysis, the dynamic process of canine tipping movement during a therapy period is simulated and the stress distribution in each phase is obtained.
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