The Accuracy of Acetabular Reaming in Total Hip Replacement

The stability of cementless cups depends upon the fit of the shell in the reamed acetabulum. Consequently, over-reaming can lead to increased micromotion or traumatic disruption with loss of cementless fixation. Therefore, it is critical that the surgeon knows the true size of the reamed acetabulum before implanting a cementless acetabular cup. In this study, high-precision laser scanning techniques were applied to determine the actual “true” size of the acetabulum after manual reaming.