Finite-element-based design optimisation of a novel high flexion knee used in total knee arthroplasty

Article type: Research Article

Authors: Sivarasu, Sudesh | Mathew, Lazar

Affiliations: School of Biotechnology, Chemical & Biomedical Engineering, VIT University, Vellore, India – 632014

Note: [] Corresponding author. Email: [email protected]

Abstract: The application of finite-element modelling in medical applications has been evolving as a field of high importance in recent times. Total knee arthroplasty (TKA) has been in existence for over 6 decades. The generic artificial knee implants used in the TKA have a restricted range of motion of around 90 degrees. A new design allowing a flexion extension range of over 120 degrees was designed and is used for analysis. Loading conditions of 10 times the body weight are considered. The finite-element analyses of the designs were carried out based on standard biomaterials used in orthopaedic implants. The results of the analyses were used in identifying areas of extreme stress within the design and the spots prone to higher deformation. On the basis of these results slight modification of the designs was carried out. The results are also verified whether the body is within the linear deformation levels. The results obtained were very satisfactory and based on these results the models have been recommended for prototyping.

Keywords: artificial knee, total knee arthroplasty, finite-element modelling, biomaterials, design optimization

DOI: 10.1080/11762320802564200

Journal: Applied Bionics and Biomechanics, vol. 5, no. 2, pp. 77-87, 2008