The effect of engineered surface topography on the tribology of CFR-PEEK for novel hip implant materials

The results from the study demonstrated that all textures reduced the coefficient of friction compared to the plain material. The variation in the performance of the different textures highlighted a need for optimum texture characteristics to be found. 150 μm circular dimples, spaced 175-200 μm apart with an area coverage of 10-15% gave the best performance in saline lubrication at a contact pressure of 2 MPa and sliding speed of 50 mm/s. Tests should be repeated in a proteinaceous testing medium at various contact pressures and speeds.