Numerical study of squeaking suppresses for ceramic-on-ceramic hip endoprosthesis

A finite element model of a ceramic hip endoprosthesis system is established with ABAQUS 6.7 and the motion stability of the model is studied using the complex eigenvalue method. Numerical results reveal that a torsional vibration and a flexural vibration of the femoral component are responsible for squeaking. Increasing Youngʹs modulus of the stem, adding CoCrMo alloy as well as 316 L stainless steel in the stem and adding a whole damping layer of UHMWPE to the acetabular component can improve the vibrant stability of the system, then, suppress the squeaking.