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The University of Southampton

Research project: Probabilistic finite-element analysis of the uncemented total hip replacement

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Many different factors, including surgical method, patient anatomy and loading conditions can affect the performance of total hip replacement. In this project, a computational probabilistic tool was developed to analyse the performance of an uncemented hip replacement. Monte-Carlo simulations were applied to various models with increasing complexity.

In early pilot models, simplified finite element models were used; the FEA was developed further to include the main muscle forces, and to consider fully bonded and frictional interface conditions. Three proximal femurs and two implants (long and short stem) were analysed. The implant and bone stiffness, load magnitude and geometry, and implant version angle were included as random variables. Automated code was created for the ‘virtual’ implantation and meshing needed for the large volume of simulations. The study achieved the aim of developing a probabilistic finite element tool for the analysis of hip replacements, laying the groundwork for future multi-parameter studies.

Analysis of a hip replacement

Related research groups

Bioengineering Science
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