Does the center of resistance depend on the direction of tooth movement?
Does the center of resistance depend on the direction of tooth movement?
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DOI：
10.1016/j.ajodo.2008.03.029
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发表时间：
2010-03-01
影响因子：
3
通讯作者：
Katona, Thomas R.
中科院分区：
文献类型：
--
作者：
Meyer, Brandon N.;Chen, Jie;Katona, Thomas R.
目的：比较6只犬下颌中切牙颊舌向(BL)和近远中向(MD)阻力中心(Cres)的位置。方法：基于牙齿及其支持组织的CT图像，利用实体模型建立有限元模型。结果：通过有限元计算，确定了6个标本在BL和MD方向上的Cres位置。从牙槽骨顶开始测量，BL和MD分别占根长的43%~51%和31%~43%。在95%可信区间，它们的平均位置分别为46.2%和38.3%，差异有统计学意义。结论：BL牙齿移动的Cres位置明显高于MD牙齿移动的位置。(Am J Orthod DentofaceOrthop 2010；137：354-61)
Introduction: The objective of this study was to compare the locations of the centers of resistance (CRes) in the buccolingual (BL) and mesiodistal (MD) directions of the mandibular central incisors of 6 dogs. Methods: Based on microcomputed tomography images of the teeth and their supporting tissues, solid models were used to build finite element models. Results: The CRes locations for the 6 specimens were determined for displacements in the BL and MD directions with finite element calculations. Measured from the alveolar crest, the BL and MD locations were 43% to 51% and 31% to 43% of root length, respectively. Their average locations, 46.2% and 38.3%, were statistically different at the 95% CI. Conclusions: The CRes location for BL tooth movement is significantly more apical than its MD counterpart. (Am J Orthod Dentofacial Orthop 2010; 137:354-61)