Patient-specific finite element modeling for femoral bone augmentation
Patient-specific finite element modeling for femoral bone augmentation
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DOI：
10.1016/j.medengphy.2013.01.003
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发表时间：
2013-06-01
影响因子：
2.2
通讯作者：
Armand, Mehran
中科院分区：
文献类型：
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作者：
Basafa, Ehsan;Armiger, Robert S.;Armand, Mehran
本研究的目的是提供一种快速且准确的有限元（FE）建模方案，用于预测骨的刚度和强度，该方案适用于计算机辅助骨质疏松性股骨增强手术系统的框架内。该系统的关键部分，即术前规划和术中对增强效果的评估，要求能够快速求解和分析有限元模型。利用9对骨质疏松性股骨的现有CT扫描和力学测试结果（每对中的一个样本用聚甲基丙烯酸甲酯（PMMA）骨水泥增强）来创建有限元模型，并将结果与实验进行比较。在实验结果和有限元分析结果之间观察到的相关系数值为\(R^{2}=0.72 - 0.95\)，再结合快速的模型收敛（对于约250,000个自由度约需3分钟），使得所提出的建模方法成为骨增强手术术前规划和术中评估预期应用的一个有希望的候选方案。（c）2013英国医学物理工程学会。由爱思唯尔有限公司出版。保留所有权利。
The aim of this study was to provide a fast and accurate finite element (FE) modeling scheme for predicting bone stiffness and strength suitable for use within the framework of a computer-assisted osteoporotic femoral bone augmentation surgery system. The key parts of the system, i.e. preoperative planning and intraoperative assessment of the augmentation, demand the finite element model to be solved and analyzed rapidly. Available CT scans and mechanical testing results from nine pairs of osteoporotic femur bones, with one specimen from each pair augmented by polymethylmethacrylate (PMMA) bone cement, were used to create FE models and compare the results with experiments. Correlation values of R-2 = 0.72-0.95 were observed between the experiments and FEA results which, combined with the fast model convergence (similar to 3 min for similar to 250,000 degrees of freedom), makes the presented modeling approach a promising candidate for the intended application of preoperative planning and intraoperative assessment of bone augmentation surgery. (c) 2013 IPEM. Published by Elsevier Ltd. All rights reserved.