| The main reason for loosening failure of total knee replacement is caused by wear of the knee prosthesis.Wear is related to contact mechanics of total knee replacement.The geometric design of bearing surface of knee prosthesis decided the contact state between the prosthetic components.Thus,there are using finite element analysis to research influence of geometric design parameters on knee prosthesis contact mechanics and sports Performance.Different types of geometric parameters involved in the design of the bearing surface of the knee prosthesis had be confirmed.The detailed modeling process of the bearing surface of the knee prosthesis from the radius of curvature to the bearing surface of the femoral condyle was introduced.Geometric models of the knee prosthesis with different geometric parameters was established.The finite element model of knee prosthesis based on displacement control under standard gait has be established,which performed numerical verification by static analysis.In addition to the above model,the finite element model of knee prosthesis based on force control under standard gait also has be established.There were set different boundary conditions to explore contact mechanics of finite element model of knee prosthesis based on displacement control.The influence of geometric parameters on the contact mechanics of knee prosthesis was studied using finite element model of knee prosthesis based on displacement control,which revealed the intrinsic link between geometric parameters and contact mechanics in knee prostheses and provides a reference for study of knee joint prosthesis wear.It was studied that influence of geometric parameters on the sports performance of knee prosthesis using finite element model of knee prosthesis based on force control,which reveals the intrinsic relationship between geometric parameters and the rotation angle of the tibial component and provides a reference for improving the kinematic performance of total knee replacement. |
