Influence of PEEK Coating on Hip Implant Stress Shielding: A Finite Element Analysis. (14th March 2016)

• Record Type: Journal Article
• Authors: Anguiano-Sanchez, Jesica; Martinez-Romero, Oscar; Siller, Hector R.; Diaz-Elizondo, Jose A.; Flores-Villalba, Eduardo; Rodriguez, Ciro A.
• Other Names: Makarov Valeri Academic Editor.
• Is Part Of: Computational and mathematical methods in medicine. Volume 2016(2016)
• Publication Date: 2016-03-14
• Subjects: Medicine -- Computer simulation -- Periodicals; Medicine -- Mathematical models -- Periodicals; 610.11
• DOI: 10.1155/2016/6183679
• Languages: English
• ISSNs: 1748-670X

Abstract

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 μ m. 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.