Wear is one of the main mechanical factors that limits the survival of total knee replacements (TKRs) and it is known to be highly dependent on the local kinematics of the knee joint. In this study, an analytical wear model was coupled to a multibody dynamic model to obtain wear distribution at the lateral and medial contact plateaus of different TKRs. The major aim was to analyze if wear distribution on the contact plateaus can be an indicator of elevated tibiofemoral misalignment which can lead to rapid TKR failure. For the multibody dynamic simulations, commercial and prototype TKR geometries were used, coupled with an augmented Archard’s law. Squat movement was chosen due to its importance both in sports and in everyday life. As a conclusion, a new parameter, denoted as wear imbalance, is introduced, which can indicate whether a TKR, due to its geometrical features, is prone to be subjected to elevated wear and failure.

中文翻译：

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基于多体动力学系统的膝关节植入物横向和内侧磨损特性的计算研究

磨损是限制全膝关节置换术 (TKR) 存活的主要机械因素之一，众所周知，磨损高度依赖于膝关节的局部运动学。在这项研究中，分析磨损模型与多体动力学模型相结合，以获得不同 TKR 的横向和内侧接触平台的磨损分布。主要目的是分析接触平台上的磨损分布是否可以作为胫股骨错位升高的指标，这会导致 TKR 快速失败。对于多体动力学模拟，使用了商业和原型 TKR 几何形状，并结合了增强的 Archard 定律。选择深蹲运动是因为它在运动和日常生活中都很重要。作为结论，引入了一个新的参数，称为磨损不平衡，它可以表明 TKR 是否，