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The Scientific World Journal
Volume 2014 (2014), Article ID 586921, 6 pages
http://dx.doi.org/10.1155/2014/586921
Research Article

Dynamic Finite Element Analysis of Mobile Bearing Type Knee Prosthesis under Deep Flexional Motion

1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
2Faculty of Mechanical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
3Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
4Sugioka Memorial Hospital, 3-6-1 Kashiiteriha, Higashi Ward, Fukuoka, Fukuoka Prefecture 813-0017, Japan
5Biomechanics Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Received 14 March 2014; Accepted 22 May 2014; Published 17 July 2014

Academic Editor: Ashvin Thambyah

Copyright © 2014 Mohd Afzan Mohd Anuar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The primary objective of this study is to distinguish between mobile bearing and fixed bearing posterior stabilized knee prostheses in the mechanics performance using the finite element simulation. Quantifying the relative mechanics attributes and survivorship between the mobile bearing and the fixed bearing prosthesis remains in investigation among researchers. In the present study, 3-dimensional computational model of a clinically used mobile bearing PS type knee prosthesis was utilized to develop a finite element and dynamic simulation model. Combination of displacement and force driven knee motion was adapted to simulate a flexion motion from 0° to 135° with neutral, 10°, and 20° internal tibial rotation to represent deep knee bending. Introduction of the secondary moving articulation in the mobile bearing knee prosthesis has been found to maintain relatively low shear stress during deep knee motion with tibial rotation.