In vivo determination of contact areas and pressure of the femorotibial joint using non-linear finite element analysis
In vivo determination of contact areas and pressure of the femorotibial joint using non-linear finite element analysis
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DOI：
10.1016/s0268-0033(98)00091-6
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发表时间：
1998-09-01
影响因子：
1.8
通讯作者：
Hobatho, MC
中科院分区：
文献类型：
--
作者：
Perie, D;Hobatho, MC
目标。为了在活体内量化关节接触，从MR图像中建立了股骨-胫骨关节的三维有限元模型。大多数股骨-胫骨关节模型都是通过体外实验建立起来的。利用立体摄影测量技术对其几何形状进行建模，并进行力学测试以量化材料特性。对正常成人膝关节进行伸展位磁共振成像。我们实验室开发的图像处理软件可以构建我们的模型几何，前后处理软件允许我们开发三维有限元模型。实验接触面积值是使用我们实验室开发的方法获得的。通过非线性有限元计算，得到了理论接触值、接触面积和静水压力。结果表明，接触面积理论值与实验值吻合较好，内侧接触处的静水压力大于侧接触处的静水压力。这项研究验证了使用接触元素来量化接触面积。该模型允许体重模拟了解半月板的作用。本研究的临床应用是为了开发一种方法，评估膝关节旋转异常在短期和长期对膝关节的影响。这包括量化接触面积和压力值及其迁移。(C)1998爱思唯尔科学有限公司。保留所有权利。
Objectives. A three dimensional finite element model of the femorotibial joint was developed from MR images in order to quantify in vivo the articular contact.Background. Most of femorotibial joint models were elaborated from in vitro experiments. The stereophotogrammetric technique was used to model the geometry and mechanical testing had been performed to quantify the material properties.Method. MR images were performed on a normal adult knee joint, in extension position. An image processing software developed in our laboratory allowed our model geometry to be constructed, and a pre-and post-processing software allowed us to develop a three-dimensional finite element model. Experimental contact area values were obtained using a method developed in our laboratory. Theoretical contact values, areas and hydrostatic pressure were obtained with a non-linear finite element computation using a non-linear software solver.Results. The results show a good agreement between theoretical and experimental contact area values, Hydrostatic pressure was found to be higher at the medial contact than at the lateral contact.Conclusion. This study validated the use of contact elements to quantify the contact areas. The model permitted the body weight simulation to understand the role of the menisci.RelevanceThe clinical application of the study was to develop a method evaluating the influcnce of rotational abnormalities of the lower limbs on the knee joint at short- and long-term. This consisted of quantifying the contact area and pressure values and their migration. (C) 1998 Elsevier Science Ltd. All rights reserved.