Dynamic finite element analysis of mobile bearing type knee prosthesis under deep flexional motion

• Main Authors: Hirokawa, S. (Author), Mohd Anuar, M.A (Author), Nagamine, R. (Author), Todo, M. (Author)
• Format: Article
• Language: English
• Published: Hindawi Limited 2014
• Subjects: Article; contact stress; finite element analysis; force; knee prosthesis; mobile bearing knee prosthesis; rotation; shear stress
• Online Access: View Fulltext in Publisher; View in Scopus

 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. © 2014 Mohd Afzan Mohd Anuar et al.