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Computational and Mathematical Methods in Medicine
Volume 2016 (2016), Article ID 6183679, 10 pages
http://dx.doi.org/10.1155/2016/6183679
Research Article

Influence of PEEK Coating on Hip Implant Stress Shielding: A Finite Element Analysis

1Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
2Escuela de Medicina, Tecnológico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico

Received 6 October 2015; Revised 20 January 2016; Accepted 7 February 2016

Academic Editor: Valeri Makarov

Copyright © 2016 Jesica Anguiano-Sanchez 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

Stress shielding is a well-known failure factor in hip implants. This work proposes a design concept for hip implants, using a combination of metallic stem with a polymer coating (polyether ether ketone (PEEK)). The proposed design concept is simulated using titanium alloy stems and PEEK coatings with thicknesses varying from 100 to 400 μm. The Finite Element analysis of the cancellous bone surrounding the implant shows promising results. The effective von Mises stress increases between 81 and 92% for the complete volume of cancellous bone. When focusing on the proximal zone of the implant, the increased stress transmission to the cancellous bone reaches between 47 and 60%. This increment in load transferred to the bone can influence mineral bone loss due to stress shielding, minimizing such effect, and thus prolonging implant lifespan.