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Modeling and Numerical Simulations of a MoP Hip-Prostheses using a Novel Bio-Plastic Material PTFE-Glass Composite

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Document pages: 5 pages

Abstract: In this paper, a 3D model a modern hip-prosthesis has been developed considering the standard dimensions of a human hip joint as per ISO 14242 to be required for the total hip replacement technique. The existing hip prostheses used are mostly available in Metal-on-Metal, Metal-on-Plastic, and Metal-on-Ceramic combinations. This study investigates the surface contact behaviour of a standard Metal-on-Plastic (MoP) hip prosthesis using a novel bio-plastic material called PTFE-glass composite for the acetabular cup or socket and standard bio-metal alloys such as Ti-6Al-4V and Co-Cr-Mo for the femoral head or ball of the hip prosthesis under different load conditions. It is found that the contact pressure of the hip prosthesis is highest in case of PTFE-glass composite as compared to that of the UHMWPE and PTFE combinations. This shows that the life of prosthesis using the PTFE-glass composite will be greater since higher contact pressure contact pressure leads to lesser abrasive wear of the contacting surface.

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