Finite element analysis of stem migration after total hip replacement

IF 2.7 3区医学 Q2 BIOPHYSICS

Biomechanics and Modeling in Mechanobiology Pub Date : 2025-08-18 DOI:10.1007/s10237-025-01985-0

Marlis Reiber, Fynn Bensel, Nils Becker, Stefan Budde, Udo Nackenhorst

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引用次数: 0

Abstract

After total hip replacement, the primary and secondary implant stability is critical to ensure long-term success. Excessive migration of the femoral stem can cause implant loosening. In this work, a novel approach for the simulation of the femoral stem migration using the finite element method is presented. Currently, only a few mostly contact-based models exist for this purpose. Instead, a bio-active interface model is used for the bone-stem interface which transforms from the Drucker–Prager to the von Mises plasticity criterion during the osseointegration process. As the position of the implant generally stabilises within one week after the implantation, the migration and osseointegration simulations are decoupled. To understand the effects on the migration, various parameter combinations are examined and a sensitivity analysis is performed. The results indicate that the joint force and the adhesion parameter have the most substantial influence on the migration. Furthermore, the influence of the migration on the subsequent osseointegration process is explored for a numerical example. The proposed model is able to depict the femoral stem migration with values up to 0.27 mm, which are in the order of magnitude of clinically observed values. Further, the model is provided as an open-source Abaqus user material subroutine. Numerical simulation of the stem migration could assist in clinical decision-making by identifying optimal parameter combinations to improve implant stability.

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全髋关节置换术后椎体迁移的有限元分析。

全髋关节置换术后，一次和二次假体的稳定性是确保长期成功的关键。股骨干过度移动可导致植入物松动。在这项工作中，提出了一种利用有限元方法模拟股骨干迁移的新方法。目前，只有几个主要基于接触的模型用于此目的。相反，骨-干界面采用生物活性界面模型，该模型在骨整合过程中从Drucker-Prager塑性准则转变为von Mises塑性准则。由于种植体的位置通常在植入后一周内稳定，因此迁移和骨整合模拟是解耦的。为了了解对迁移的影响，检查了各种参数组合并进行了灵敏度分析。结果表明，结合力和附着参数对迁移的影响最为显著。此外，通过数值算例探讨了迁移对后续骨整合过程的影响。所提出的模型能够描述股骨干迁移，其值可达0.27 mm，与临床观察值相当。此外，该模型作为开源Abaqus用户材料子例程提供。通过确定最佳的参数组合来提高种植体的稳定性，数值模拟可以帮助临床决策。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomechanics and Modeling in Mechanobiology 工程技术-工程：生物医学

CiteScore

7.10

自引率

8.60%

发文量

119

审稿时长

6 months

期刊介绍： Mechanics regulates biological processes at the molecular, cellular, tissue, organ, and organism levels. A goal of this journal is to promote basic and applied research that integrates the expanding knowledge-bases in the allied fields of biomechanics and mechanobiology. Approaches may be experimental, theoretical, or computational; they may address phenomena at the nano, micro, or macrolevels. Of particular interest are investigations that (1) quantify the mechanical environment in which cells and matrix function in health, disease, or injury, (2) identify and quantify mechanosensitive responses and their mechanisms, (3) detail inter-relations between mechanics and biological processes such as growth, remodeling, adaptation, and repair, and (4) report discoveries that advance therapeutic and diagnostic procedures. Especially encouraged are analytical and computational models based on solid mechanics, fluid mechanics, or thermomechanics, and their interactions; also encouraged are reports of new experimental methods that expand measurement capabilities and new mathematical methods that facilitate analysis.