Table of Contents
Journal of Medical Engineering
Volume 2017, Article ID 3069351, 10 pages
https://doi.org/10.1155/2017/3069351
Research Article

Optimization of a Functionally Graded Material Stem in the Femoral Component of a Cemented Hip Arthroplasty: Influence of Dimensionality of FGM

Department of Engineering and Physics, University of Central Oklahoma, Edmond, OK 73034, USA

Correspondence should be addressed to Abdellah Ait Moussa; ude.ocu@assuomtiaa

Received 14 October 2016; Revised 9 January 2017; Accepted 22 May 2017; Published 21 June 2017

Academic Editor: Norio Iriguchi

Copyright © 2017 Abdellah Ait Moussa and Rohan Yadav. 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 longevity of hip prostheses is contingent on the stability of the implant within the cavity of the femur bone. The cemented fixation was mostly adopted owing to offering the immediate stability from cement-stem and cement-bone bonding interfaces after implant surgery. Yet cement damage and stress shielding of the bone were proven to adversely affect the lifelong stability of the implant, especially among younger subjects who tend to have an active lifestyle. The geometry and material distribution of the implant can be optimized more efficiently with a three-dimensional realistic design of a functionally graded material (FGM). We report an efficient numerical technique for achieving this objective, for maximum performance stress shielding and the rate of early accumulation of cement damage were concurrently minimized. Results indicated less stress shielding and similar cement damage rates with a 2D-FGM implant compared to 1D-FGM and Titanium alloy implants.