Geometric parameterisation of pelvic bone and cartilage in contact analysis of the natural hip: an initial study.
Geometric parameterisation of pelvic bone and cartilage in contact analysis of the natural hip: an initial study.
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DOI：
10.1177/0954411915592656
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发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
Jones AC
中科院分区：
文献类型：
--
作者：
Hua X;Li J;Wilcox RK;Fisher J;Jones AC
人体髋关节的参数化有限元模型有可能允许对关节接触力学的个体几何特征的影响进行受控分析。然而，挑战在于定义一组参数，这些参数足以捕获关节几何形状，以便区分个体。在这项研究中，一组简单的参数来描述髋臼和髋关节软骨的几何形状提取两个分割为基础的模型，然后用于生成参数化的有限元模型为两个主题。将参数化有限元模型预测的关节面接触压力和接触面积与基于分割的模型的结果进行比较。参数化模型和基于分割的模型之间的预测结果的差异被发现在11%以内，在七个活动模拟。此外，参数化模型能够复制两个受试者之间不同的负载周期内的接触压力/面积波动的特征。这些结果提供了信心，参数化的方法可以用来生成有代表性的人体髋关节接触分析的有限元模型。这种方法有可能被用于系统地评价几何特征，可以从简单的临床测量中捕获，并提供一种成本和时间有效的方法分层的髋臼几何形状的患者群体。
Parameterised finite element models of the human hip have the potential to allow controlled analysis of the effect of individual geometric features on the contact mechanics of the joint. However, the challenge lies in defining a set of parameters which sufficiently capture the joint geometry in order to distinguish between individuals. In this study, a simple set of parameters to describe the geometries of acetabulum and cartilage in the hip were extracted from two segmentation-based models, which were then used to generate the parameterised finite element models for the two subjects. The contact pressure and contact area at the articular surface predicted from the parameterised finite element models were compared with the results from the segmentation-based models. The differences in the predicted results between the parameterised models and segmentation-based models were found to be within 11% across seven activities simulated. In addition, the parameterised models were able to replicate features of the contact pressure/area fluctuations over the loading cycle that differed between the two subjects. These results provide confidence that the parameterised approach could be used to generate representative finite element models of the human hip for contact analysis. Such a method has the potential to be used to systematically evaluate geometric features that can be captured from simple clinical measurements and provide a cost- and time-effective approach for stratification of the acetabular geometries in the patient population.