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


Affiliations
1 Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
2 Escuela de Medicina, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
 

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

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Authors

Jesica Anguiano-Sanchez
Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
Oscar Martinez-Romero
Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
Hector R. Siller
Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
Jose A. Diaz-Elizondo
Escuela de Medicina, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
Eduardo Flores-Villalba
Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico
Ciro A. Rodriguez
Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Avenida Eugenio Garza Sada 2501, 64849 Monterrey, Mexico

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.