A total of 156 ceramic versus ultra-high-molecular-weight polyethylene hip
prostheses were followed for a minimum of 10 years to compare the outcome o
f the femoral component in 2 groups: those with and those without radiologi
cally detectable voids in the cement mantle. No significant difference was
observed. In this series, voids with a 5-mm diameter had no effect on loose
ning of the femoral component over a 10-year period.