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Updated: Jul 1, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Finite element analysis of stem migration after total hip replacement
Marlis Reiber1,2, Fynn Bensel3,4,5, Nils Becker6
1Institute of Mechanics and Computational Mechanics (IBNM), Leibniz University Hannover, Appelstraße 9a, 30167, Hannover, Germany. marlis.reiber@ibnm.uni-hannover.de.
This study introduces a new finite element method model to simulate femoral stem migration after hip replacement. The model accurately predicts migration, aiding in optimizing implant stability and reducing loosening risks.
Area of Science:
- Biomedical Engineering
- Computational Mechanics
- Orthopedic Surgery
Background:
- Implant stability is crucial for total hip replacement (THR) success.
- Femoral stem migration can lead to implant loosening.
- Existing simulation models are limited, often relying on contact mechanics.
Purpose of the Study:
- To present a novel finite element method (FEM) approach for simulating femoral stem migration.
- To develop a bio-active interface model that evolves during osseointegration.
- To analyze factors influencing stem migration and its impact on osseointegration.
Main Methods:
- Utilized a bio-active interface model transitioning from Drucker-Prager to von Mises plasticity.
- Decoupled migration and osseointegration simulations for a one-week stabilization period.
- Performed sensitivity analysis on various parameter combinations.
Main Results:
- Identified joint force and adhesion as key factors influencing migration.
- The model accurately depicted femoral stem migration within 0.27 mm, aligning with clinical observations.
- Explored the impact of migration on subsequent osseointegration in a numerical example.
Conclusions:
- The developed FEM model provides a robust tool for simulating femoral stem migration.
- Numerical simulation can aid clinical decision-making for improved implant stability.
- The model is available as an open-source Abaqus user material subroutine.
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