Experimental and numerical evaluation of the implant-cement strength of the femoral prosthesis

This study investigated the influence of Implant surface roughness on the resistance of the implant–cement interface. Mechanical fixation at the implant–cement interface was evaluated in vitro using shear loading with stainless steel rods with different surface roughness preparations. The finite element models (FEM) were used to compute the resistance of the implant-cement interface. Increasing surface roughness improved the mechanical properties at the implant–cement interface. Therefore, it increases the long-term stability of the hip prostheses assembly