Mechanical environment change in root, periodontal ligament, and alveolar bone in response to two canine retraction treatment strategies.
Mechanical environment change in root, periodontal ligament, and alveolar bone in response to two canine retraction treatment strategies.
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DOI：
10.1111/ocr.12076
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发表时间：
2015-04
影响因子：
3.1
通讯作者：
Chen J
中科院分区：
文献类型：
--
作者：
Jiang F;Xia Z;Li S;Eckert G;Chen J
研究两种治疗策略（低或高力矩力比（M/F））引起的牙根表面、牙周膜（PDL）和牙槽骨的初始力学环境（ME）变化。印第安纳州普渡大学印第安纳波利斯分校。18名患者接受了上颌双侧尖牙回缩。根据患者的锥形束CT扫描结果，建立上颌尖牙的有限元模型。对于每例患者，一侧的犬齿有一个特殊设计的T形环弹簧，M/F高于另一侧。计算了组织中的四个应力不变量（第一主应力/第二主应力/第三主应力/von Mises应力）。将应力与先前报道的骨矿物质密度（BMD）变化进行比较，以将ME变化与骨建模/重塑活动联系起来。相关性用混合模型方差分析进行检验。牙槽骨在牙齿移动的方向上主要处于拉伸状态，而PDL处于压缩状态;相反方向上的应力具有相反的模式。M/F主要影响牙根应力。牙齿移动方向上的三个应力不变量（第一主应力/第三主应力/横向应力）与BMD损失具有中等相关性。应力不变量可用于表征当ME改变时骨细胞感觉到什么。它们在组织中的分布显著不同，这意味着细胞经历不同的刺激。牙槽骨中骨活动沿着移动方向的增加可能与牙槽骨中初始体积的增加和减少有关。
To investigate the initial mechanical environment (ME) changes in root surface, periodontal ligament (PDL), and alveolar bone due to two treatment strategies, low or high moment-to-force ratio (M/F). Indiana University-Purdue University Indianapolis. Eighteen patients who underwent maxillary bilateral canine retraction. Finite element models of the maxillary canines from the patients were built based on their cone beam computed tomography scans. For each patient, the canine on one side had a specially designed T-loop spring with the M/F higher than the other side. Four stress invariants (1st principal/dilatational/3rd principal/von Mises stress) in the tissues were calculated. The stresses were compared with the bone mineral density (BMD) changes reported previously for linking the ME change to bone modeling/remodeling activities. The correlation was tested by the mixed-model anova. The alveolar bone in the direction of tooth movement is primarily in tension, while the PDL is in compression; the stresses in the opposite direction have a reversed pattern. The M/F primarily affects the stress in root. Three stress invariants (1st principal/3rd principal/dilatational stress) in the tooth movement direction have moderate correlations with BMD loss. The stress invariants may be used to characterize what the osteocytes sense when ME changes. Their distributions in the tissues are significantly different, meaning the cells experience different stimuli. The higher bone activities along the direction of tooth movement may be related to the initial volumetric increase and decrease in the alveolar bone.
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影响因子：
3.1
作者：
Klein-Nulend, J.;Bacabac, R. G.;Bakker, A. D.
通讯作者：
Bakker, A. D.
影响因子：
4.8
作者：
Onal, Melda;Xiong, Jinhu;O'Brien, Charles A.
通讯作者：
O'Brien, Charles A.
DOI：
10.1016/j.ajodo.2008.03.029
发表时间：
2010-03-01
影响因子：
3
作者：
Meyer, Brandon N.;Chen, Jie;Katona, Thomas R.
通讯作者：
Katona, Thomas R.
影响因子：
6.2
作者：
Price, Christopher;Zhou, Xiaozhou;Li, Wen;Wang, Liyun
通讯作者：
Wang, Liyun
DOI：
10.1067/mod.2001.116085
发表时间：
2001-09-01
影响因子：
3
作者：
Qian, HH;Chen, J;Katona, TR
通讯作者：
Katona, TR