Finite Element Analysis And Experimental Research On Biomechanical Properties Of Femoral Prosthesis

Hip joint is one of the important bone joints connecting the trunk and lower limbs of the human body.However,hip joint disease caused by lesions and accidents will bring inconvenience to the movement and life of patients.At present,the most effective way to solve this problem is to carry out total hip arthroplasty.The research of biomechanical properties of femoral prosthesis can avoid the middle and long-term postoperative complications such as prosthesis subsidence and fracture to a certain extent.Because the biomechanical experiments on human body are inaccurate and safe,using finite element technology to assist research and development to guide clinical treatment has become an important means in the field of medical biomechanics.In this paper,the biomechanical properties of Corail and Synergy porous titanium alloy prostheses are compared and analyzed by finite element simulation,and the mechanical test of femoral prosthesis implanted into cadaver specimens is carried out.Through the comparison of experimental data and simulation data,it provides reliable theoretical data for clinical orthopedics.Firstly,the three-dimensional modeling of femur is completed based on the three-dimensional reconstruction technology of medical image,and the heterogeneous material assignment of the femur model realizes the heterogeneity of the femoral material.Mimics software is used to assemble the femoral model and Corail prosthesis or Synergy porous prosthesis according to the clinical needs.Secondly,using Hypermesh software to mesh the displacement model with better mesh quality.The finite element analysis of normal femur and two replacement models under static and gait loads is carried out by ABAQUS software.The biomechanical properties of stress shielding,prosthesis subsidence displacement and replacement stability of different models under different working conditions are compared.And building strain collector to verify the accuracy of the system.Finally,the treated femoral specimens are matched with the prosthesis and mechanical experiments are carried out to obtain displacement and strain data.Comparing these data with simulation data,which can verify the accuracy of the simulation.It can be used to evaluate the biomechanical properties of two displacement models.