Salib CG, et al. - Between 1998 and 2015, authors assessed 84 candidates to analyze the impact of variations in pelvic orientation of subjects with spine fusions on dislocation risk after total hip arthroplasty (THA). They measured significant radiological differences in mean anterior pelvic tilt between the one-level lumbar fusion group (22°), the multiple-level fusion group (27°), and the sacral fusion group (32°). They observed no significant difference in the rate of dislocation in subjects without a sacral fusion. An increase in the risk of dislocation within the first 6 months was noticed in cases with lumbosacral spinal fusions preceding THA. They recorded 93% of 10-year survival in the fusion group and 95% in controls.