MODELING THE BIOMECHANICS OF THE MANDIBLE - A 3-DIMENSIONAL FINITE-ELEMENT STUDY
MODELING THE BIOMECHANICS OF THE MANDIBLE - A 3-DIMENSIONAL FINITE-ELEMENT STUDY
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DOI：
10.1016/0021-9290(92)90025-v
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发表时间：
1992-03-01
影响因子：
2.4
通讯作者：
ANDERSON, RC
中科院分区：
文献类型：
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作者：
HART, RT;HENNEBEL, VV;ANDERSON, RC
建立了部分无牙下颌骨的三维有限元模型，计算了模拟等长咬合和咀嚼载荷下的力学响应。 通过收敛性测试确定了网格细化的水平，并表明需要具有超过30，000个自由度的模型才能获得分析精度。 功能负荷情况包括基于根据肌肉横截面积分配肌肉力的算法的肌肉负荷，同时保持静态平衡。 结果发现，等距应用单侧和双侧咬合和咀嚼负荷，并施加两套不同的位移边界条件的髁突。 机械响应以位移、主应变和一种称为“机械强度标量”的新度量表示。 对于研究的每种载荷情况，在体部的磨牙区域存在大量弯曲，在支的前部存在高拉伸应变。
Three-dimensional finite element models of a partially edentulated human mandible were generated to calculate the mechanical response to simulated isometric biting and mastication loads. The level of mesh refinement was established via a convergence test and showed that a model with over 30,000 degrees of freedom was required to obtain analysis accuracy. The functional loading cases included muscle loading based on an algorithm that assigns muscle forces in accordance with muscle cross-sectional area, while maintaining static equilibrium. Results were found for isometric application of unilateral and bilateral bite and mastication loading, and two different sets of displacement boundary conditions were imposed at the condyles. The mechanical response is shown in terms of displacements, principal strains, and a new measure called the 'mechanical intensity scalar'. For each load case studied, there was substantial bending in the molar region of the corpus and high tensile strains in the anterior portion of the ramus.