No effect of additional screw fixation of a cementless all-polyethylene press-fit socket on migration wear and clinical outcome

摘要

Background and purposeAdditional screw fixation of the all-polyethylene press-fit RM cup (Mathys) has no additional value for migration, in the first 2 years after surgery. However, the medium-term and long-term effects of screw fixation remain unclear. We therefore evaluated the influence of screw fixation on migration, wear, and clinical outcome at 6.5 years using radiostereometric analysis (RSA).