Objective: We sought to correlate various spinopelvic and lower limb alignments, and to examine the current spinopelvic theories on a Chinese cohort. Methods: We retrospectively reviewed 166 patients undergoing THA. Among them, 138 patients with unilateral THA met the inclusion criteria. Sagittal alignments and cup orientations were measured on standing and sitting lateral EOS images. Patients were categorized into two groups with a scoring system for lumbar spine degeneration. Patients' demographics including age, sex, lumbar spine degeneration and radiographic measurements were studied. Results: PT, SS, LL and TK differed significantly between standing and sitting within each group except for TK in degenerative group (32.8 +/- 13.9 vs. 32.9 +/- 14.2, p = 0.905). Compared with degenerative spine group, non-degenerative spine patients have great pelvic mobility (delta PT, -24.4 +/- 12.5?degrees vs. -17.6 +/- 10.7, p = 0.0008), greater lumbar mobility (delta LL, -34.8 +/- 15.2 vs. -21.7 +/- 12.2, p = < 0.0001) and compensatory cup orientation changes (delta RA, -15.5 +/- 11.1 vs. -12.0 +/- 8.4, p = 0.00920; delta RI, -10.8 +/- 11.5 vs. -5.6 +/- 7.5, p = 0.0055). Standing PT and ankle dorsiflexion angle correlated positively (R-2 = 0.236, p = 0.005). Conclusion: THA patients in this cohort showed a spinopelvic motion paradigm similar to that from previous studies on Caucasians. Ankle dorsiflexion indicate greater posterior pelvic tilt on standing. Surgeons should beware of risks of instability in patients with lower limb compensations. Advances in knowledge: This study provides new insights into the clinical relevance of lower limb alignments to spinopelvic motion after THA in a relatively young Chinese population.
基金：
National Natural Science Foundation of China; [82172473]
第一作者单位：[1]Fudan Univ, Huashan Hosp, Dept Orthopaed, 12 Middle Wulumuqi Rd, Shanghai 200040, Peoples R China
共同第一作者：
通讯作者：
推荐引用方式(GB/T 7714)：
Chen Kangming,Wu Jinyan,Huang Gangyong,et al.Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty[J].BMC MUSCULOSKELETAL DISORDERS.2022,23(1):doi:10.1186/s12891-022-06032-y.
APA：
Chen, Kangming,Wu, Jinyan,Huang, Gangyong,Liu, Changquan,Shen, Chao...&Chen, Xiaodong.(2022).Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty.BMC MUSCULOSKELETAL DISORDERS,23,(1)
MLA：
Chen, Kangming,et al."Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty".BMC MUSCULOSKELETAL DISORDERS 23..1(2022)
