INFLUENCE OF MODELING METHODS FOR CARTILAGE LAYER ON SIMULATION OF PERIACETABULAR OSTEOTOMY USING FINITE ELEMENT CONTACT ANALYSIS
INFLUENCE OF MODELING METHODS FOR CARTILAGE LAYER ON SIMULATION OF PERIACETABULAR OSTEOTOMY USING FINITE ELEMENT CONTACT ANALYSIS
复制标题
软骨层建模方法对有限元接触分析模拟髋臼周围截骨术的影响
DOI：
10.1142/s0219519418500185
复制
发表时间：
2018
影响因子：
0.8
通讯作者：
CHEN XIAN
中科院分区：
文献类型：
--
作者：
LI FEI;CHEN HEJUAN;MAWATARI TARO;IWAMOTO YUKIHIDE;JIANG FEI;CHEN XIAN
利用有限元分析方法对髋臼周围截骨术（PAO）进行了模拟，以预测髋臼周围截骨术对发育不良髋关节接触压力集中的改善情况。由于软骨层很难从CT或MRI图像中分割出来，大多数髋关节模型都被假设为一个简单的完美球窝关节。然而，不同的软骨建模方法对模拟的可靠性的影响尚未得到评估。本研究的目的是阐明不同的软骨建模方法对有限元接触分析预测软骨层的接触压力的影响。在这项研究中，软骨层生成通过应用三种典型的建模方法（球形，均匀厚度，和基于中线）。在与这些软骨建模方法进行比较之后，计算结果表明，软骨建模方法对PAO中接触压力的预测具有显著的影响。球形软骨模型的接触压力分布相对连续，峰值接触压力较低。均匀厚度和基于中线的软骨建模方法获得了不连续的接触压力分布和较高的峰值接触压力。而基于中线的软骨建模方法中压力分布的不连续程度更差。
Finite element (FE) analysis has been used in the simulation of periacetabular osteotomy (PAO) to predict the improvement of contact pressure concentration in dysplastic hip joint. Since the cartilage layer is difficult to be segmented from CT or MRI images, most hip joint models were assumed to be a simple perfect ball and socket joint. However, the influence of different cartilage modeling methods on the reliability of the simulation has not been assessed. The objective of this study is to elucidate the influence of different cartilage modeling methods on predictions of cartilage layers’ contact pressure by FE contact analysis. In this study, the cartilage layer was generated by applying three typical kinds of modeling methods (spherical, uniform thickness, and midline-based). After comparisons with these cartilage modeling methods, the computational results demonstrate that the cartilage modeling methods have a dramatic influence on predictions of contact pressure in the PAO. The relatively continuous contact pressure distribution and lower peak contact pressure are observed in spherical cartilage modeling method. The discontinuous contact pressure distribution and higher peak contact pressure are obtained in uniform thickness and midline-based cartilage modeling methods. And the degree of discontinuous pressure distribution is even worse in the midline-based cartilage modeling method.