A dynamic model of simulating stress distribution in the distal femur after total knee replacement

Shi, J F, Wang, C J, Laoui, T, Hart, W and Hall, R (2007) A dynamic model of simulating stress distribution in the distal femur after total knee replacement. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 221 (8). pp. 903-912. ISSN 0954-4119

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Abstract

The aim of this study has been to develop a dynamic model of the knee joint after total knee replacement (TKR) to analyse the stress distribution in the distal femur during daily activities. Using MSC/ADAMS and MSC/MARC software, a dynamic model of an implanted knee joint has been developed. This model consists of the components of the knee prosthesis as well as the bones and ligaments of the knee. The femur, tibia, fibula, and patella have been modelled as mixed cortico-cancellous bone. The distal part of femur has been modelled as a flexible body with springs used to simulate the ligaments positioned at their anatomical insertion points.

With this dynamic model a gait cycle was simulated. Stress shielding was identified in the distal femur after TKR, which is consistent with other investigators' results. Interestingly, higher stresses were found in the bone adjacent to the femoral component peg.

This dynamic model can now be used to analyse the stress distribution in the distal femur with different load conditions. This will help to improve implant designs and will allow comparison of prostheses from different manufacturers.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Depositing User: Chang Wang
Date Deposited: 03 Oct 2013 14:48
Last Modified: 03 Oct 2013 14:49
URI: http://sro.sussex.ac.uk/id/eprint/46556
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