Hoskins W, Bingham R, Dyer C, et al. - This research sought to correlate the revision rates for dislocation and aseptic causes between dual mobility (DM) and large femoral heads and sub-analyzed by acetabular component size. Between January 2008 (the year of first recorded DM use) and December 2019, data from the Australian Orthopedic Association National Joint Replacement Registry were examined for patients undergoing primary total hip arthroplasty (THA) for osteoarthritis. In this analysis, there were 4942 DM and 101,221 large femoral head bearings recorded. No difference in revision rates for dislocation or aseptic causes between DM and large femoral heads in primary THA was observed. DM reduces dislocation for acetabular component diameter < 58 mm when stratified by acetabular component size.