Press Fit Hip Implant Interfacial Motion Analysis

Abstract

<p>Press fit hip implants present marked advantages and disadvantages as compared to cemented hip implants. Implant fixation plays an important role in the stability, efficacy, and longevity of press fit hip implants. A key factor in implant fixation is the amount of interfacial motion between implant stem and the femur. A finite element analysis (FEA) was performed on several hip implant designs to study interfacial motion between implant and femur. Implants were of distinct cross section and stem design. Each implant was subject to loading simulating a 160lb person taking a step forward. Three materials were used for the analysis; Cr-Co-Mo, Stainless Steel SS316L, and titanium alloy Ti-6AI-4V. Results showed that implant profile and stem design along with material played a role in the amount of interfacial motion.</p><p>This presentation occurred at the Wright State University Campus-Wide Celebration of Research, Scholarship and Creative Activities on April 16, 2010</p>