Comparative investigation and analysis of hip prosthesis for different bio-compatible alloys

Abstract Hip assembly is the primary joint that provides strength and stability to the human body. Aging of human and accidental circumstances may cause replacement of hip joint entirely or partially. Hip arthroplasty (HA) is a surgical procedure of replacing a diseased or fractured hip joint with an artificial metallic/multi-material implant. Several parameters i.e. size, shape, material, porosity, stress etc. are needed to address to find out the best fit implant for the patient. In present work, Charnley’s femoral stem model is considered as a standard femoral stem. Stress, deformation and safety are important mechanical parameters for evaluation of the implant whereas longevity and functionality significantly depends upon the design and selection of material (s). Main focus of this analytical experimentation is to find out the best-suited material for the hip stem by optimizing different parameters. Fifteen alloy combinations of Co, Cr and Ti materials have been considered for the analysis exhibiting excellent biocompatibility and mechanical properties. Based on the chosen loading condition i.e. 2.3KN, Co-Ni-Cr-Mo (Wrought) alloy is emerged best-suited material with their moderate stress results, minimum deformations and maximum factor of safety. Also lateral dimensions of the implant demonstrate higher stress, deformation and strains than the medial side from proximal to distal end.