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Open Access 01-12-2022 | Hip-TEP | Research

Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty

Authors: Kangming Chen, Jinyan Wu, Gangyong Huang, Changquan Liu, Chao Shen, Junfeng Zhu, Yang Li, Tao Li, Fei Xiao, Jianping Peng, Xiuguo Han, Xinhai Zhang, Jun Xia, Xiaodong Chen

Published in: BMC Musculoskeletal Disorders | Issue 1/2022

Abstract

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 (ΔPT, -24.4 ± 12.5° vs. -17.6 ± 10.7, p = 0.0008), greater lumbar mobility (ΔLL, -34.8 ± 15.2 vs. -21.7 ± 12.2, p = < 0.0001) and compensatory cup orientation changes (ΔRA, -15.5 ± 11.1 vs. -12.0 ± 8.4, p = 0.00920; ΔRI, -10.8 ± 11.5 vs. -5.6 ± 7.5, p = 0.0055). Standing PT and ankle dorsiflexion angle correlated positively (R² = 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.

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Title: Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty
Authors: Kangming Chen
Jinyan Wu
Gangyong Huang
Changquan Liu
Chao Shen
Junfeng Zhu
Yang Li
Tao Li
Fei Xiao
Jianping Peng
Xiuguo Han
Xinhai Zhang
Jun Xia
Xiaodong Chen
Publication date: 01-12-2022
Publisher: BioMed Central
Keywords: Hip-TEP
Hip-TEP
Published in: BMC Musculoskeletal Disorders / Issue 1/2022
Electronic ISSN: 1471-2474
DOI: https://doi.org/10.1186/s12891-022-06032-y

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty

Abstract

Objective

Methods

Results

Conclusion

Advances in knowledge

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

Advances in knowledge

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