Consideration of anisotropic elasticity minimizes volumetric rather than shear deformation in human mandible
Consideration of anisotropic elasticity minimizes volumetric rather than shear deformation in human mandible
复制标题
考虑各向异性弹性可最大限度地减少人类下颌的体积变形而不是剪切变形
DOI：
10.1080/10255840600661482
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发表时间：
2006
影响因子：
1.6
通讯作者：
H. Zeilhofer
中科院分区：
文献类型：
--
作者：
C. Kober;B. Erdmann;C. Hellmich;R. Sader;H. Zeilhofer
这篇文章的重点是各向异性弹性在模拟载荷分布在人类下颌骨的作用，由于在最左边的前磨牙侧咬。基于实验证据，骨组织弹性特性采用正交异性。各向异性弹性的轨迹是由(i)器官的几何形状和（ii）从计算机断层扫描（CT）灰度值的空间分布中可以识别的相干结构重建的。一项包含各种三维（3D）有限元（FE）模拟的敏感性分析揭示了弹性各向异性与人类下颌骨承载行为的相关性：各向同性和各向异性模拟的载荷分布的比较表明，各向异性似乎使下颌骨“免于”载荷。此外，最大程度的各向异性导致下颌骨的载荷最小化，通过最小的不同规范的局部体积应变来表达，评估整个器官。观察到的关于体积应变而不是剪切应变的优化似乎证实了体积应变诱导的流体流动对刺激细胞活性的经常强调的作用。
This article is focused on the role of anisotropic elasticity in the simulation of the load distribution in a human mandible, due to a lateral bite on the leftmost premolar. Based on experimental evidence, orthotropy of the elastic properties of the bone tissue has been adopted. The trajectories of anisotropic elasticity are reconstructed from (i) the organ's geometry and (ii) from coherent structures which can be recognized from the spatial distribution of the grey values coming from computer tomography (CT). A sensitivity analysis comprising various three-dimensional (3D) finite element (FE) simulations reveals the relevance of elastic anisotropy for the load carrying behavior of a human mandible: comparison of the load distributions in isotropic and anisotropic simulations indicates that anisotropy seems to “spare” the mandible from loading. Moreover, a maximum degree of anisotropy leads to kind of load minimization of the mandible, expressed by a minimum of different norms of local volumetric strain, evaluated throughout the organ. The observed optimization with respect to volumetric rather than shear strain seems to confirm the frequently emphazised role of volumetric-strain-induced fluid flow for the stimulation of cellular activity.
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影响因子：
2.4
作者：
HART, RT;HENNEBEL, VV;ANDERSON, RC
通讯作者：
ANDERSON, RC
影响因子：
2.4
作者：
You, LD;Cowin, SC;Weinbaum, S
通讯作者：
Weinbaum, S
影响因子：
2.4
作者：
Jacobs, CR;Yellowley, CE;Donahue, HJ
通讯作者：
Donahue, HJ
影响因子：
2.4
作者：
TURNER, CH;COWIN, SC;RICE, JC
通讯作者：
RICE, JC