Buckland AJ, et al. - A multi-center database of 1,100 preoperative total hip arthroplasty (THA) patients were questioned by the experts in order to assess the effect of sagittal spinal deformity, defined by pelvic-incidence lumbar-lordosis mismatch (PI-LL), on postural changes in pelvic tilt(PT). Among hyperlordotic patients, across all PI-LL, PT and anterior-pelvic-plane tilt (APPt) change were different from standing to seated, supine, and stepping-up with less spinopelvic tilt (SPT)/APPt recruitment in comparison to flatback patients categories. From standing to seated, supine, and stepping-up, greater PI-LL was related to greater SPT recruitment while smaller LL alterations were associated with greater SPT recruitment. Hence, in THA patients postural changes in SPT/APPt were correlated to spinopelvic measures. As compared to flatback patients who were more likely to recruit PT, hyperlordotic patients utilized their spines more often. Further, in order to diminish prosthetic dislocation prevalence following THA, more focus on patients with lumbar flatback and hyperlordosis could help in such situations.