, et al. - Researchers retrospectively studied 346 metal-on-metal hip arthroplasty (MoMHA) revisions for adverse reactions to metal debris (ARMD) performed at 2 European centers to examine predictors of poor outcomes after MoMHA revision surgery performed for ARMD to decide the revision threshold and type of reconstruction. The occurrence of poor outcome was observed in 38.5%. The only preoperative predictor of poor outcomes was a shorter time (under 4 years) to revision surgery. No impact of prerevision metal ions and imaging was noted on outcomes. Increased risk of poor outcomes was recorded in single-component revisions as compared to all-component revisions. Following intraoperative modifiable factors declined the risk of poor outcomes: the posterior approach (OR = 0.22), revision head sizes ≥36 mm (vs <36 mm: OR = 0.37), ceramic-on-polyethylene revision bearings (OR vs ceramic-on-ceramic = 0.30), and metal-on-polyethylene revision bearings (OR vs ceramic-on-ceramic = 0.37).