ABSTRACT
Initial mechanical stability is a prerequisite for long-term survival of cemented components. This has been elegantly shown by Karrholm et a!., who found that in both revisions and primary cemented hips, those with a higher migration rate failed significantly earlier than more stable reconstructions [I]. In primary total hip replacement (THR), initial stability is usually no problem as the cement secures the component firmly to the surrounding bone, but in cemented revisions it is more difficult to achieve stable cup fixation.
