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首页> 外文会议>World Tribology Congress III 2005 vol.2 >BIOMECHANICAL MODELING OF HIP JOINT PROSTHESIS
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BIOMECHANICAL MODELING OF HIP JOINT PROSTHESIS

机译：髋关节假体的生物力学建模

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In this work a Bombelli cementless isoelastic RM total hip prosthesis was considered. It was implanted over a course of 14 years on the patient and studied subsequently to its chirurgical replacement. Computed Tomography, radiographies and 3-D laser scanning were used to assess the prosthesis geometry, while the original femur anatomy was modeled based on 2-D radiographies taken at different stages of the in-vivo implant of the prosthesis. A finite element model was developed, based on the generated 3-D geometrical model, considering a linear elastic behavior and typical loading conditions. This analysis allowed determining stress and strain fields throughout bone-prosthesis contact surface and critical areas in terms of micromovements. The developed procedure, consisting of 3-D scanning, generation of geometrical 3-D models and finite element analysis, results in a powerful tool to follow-up and predict failure mechanisms in hip joint prosthesis.
机译：在这项工作中，考虑了Bombelli非骨水泥等弹性RM全髋关节假体。它在患者身上植入了长达14年的历程，随后进行了手术替代治疗。使用计算机断层扫描，X射线摄影和3D激光扫描来评估假体的几何形状，而原始股骨解剖模型则是根据在假体体内植入的不同阶段拍摄的2D射线摄影来建模的。基于生成的3-D几何模型，考虑了线性弹性行为和典型的载荷条件，开发了有限元模型。这种分析可以确定整个骨骼-假体接触表面和关键区域的微动应力和应变场。所开发的程序包括3-D扫描，几何3-D模型生成和有限元分析，从而形成了一种强大的工具，可以追踪和预测髋关节假体的失效机制。

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