Homogeneous Modelling and Analysis of Hip Prosthesis Using FEA

Abstract

With keen interest in hip prosthesis, optimization of orthopaedic implant is carried out in this work to limit probability of implant failure and increase success rate of surgery. The focal point of work is to calculate stress at the interface between implant and bone. Reduction of stress level in the femur implant because of major load carried by prosthesis because of its higher stiffness cause aseptic loosening of the implant which is a consequence of bone resorption phenomenon. The problem of bone resorption can be resolved by using porous titanium-based alloy with low young’s modulus but these materials cannot sustain desirable mechanical properties because of high porosity. In proposed work finite element analysis of hip prosthesis by using three different titanium-based alloys with varying young’s modulus (Homogeneous Material) has been carried out to identify material with optimum balance of porosity and stress shielding. On doing comparisons of results among three different models, model with intermediate value of young’s modulus was realised to deliver the best result.