Changes in Lower Limb Axial Alignment, Gait Biomechanics, and Plantar Force in Crowe Type IV Hip Dysplasia After Total Hip Arthroplasty: A Mean Ten‐Year Follow‐Up Retrospective Cohort Study

作者：Chen Huiling, Junqing Wang, Y B Li, Steve T. L. Pambayi, Shijiu Yin, Jie Yang, Y. Nie, Yi Zeng · 发表于：Orthopaedic Surgery · 年份：2026 · DOI：10.1111/os.70258 · 被引用次数：1 · 研究领域：Orthopaedic implants and arthroplasty、Hip disorders and treatments、Hip and Femur Fractures

OBJECTIVES: Total hip arthroplasty (THA) is the gold standard for treating Crowe IV developmental dysplasia of the hip (DDH). However, its long-term effects on lower limb alignment, gait biomechanics, and plantar force in these patients remain underexplored, which is discussed in this article. METHODS: We conducted a retrospective cohort study that included 43 DDH Crowe IV patients who underwent THA between February 2008 and October 2019 and a control group of 43 matched healthy volunteers. Postoperative functional outcomes and quality of life were assessed using the Harris Hip Score, KOOS, AOFAS, and WOMAC scores. Lower limb alignment parameters (MAD, HKA, aTFA, mLDFA, mMPTA, and FO), knee alignment (HMFC, HLFC), and ankle alignment (mLDTA, FACO, and TT) were measured preoperatively, postoperatively, and at follow-up. Gait analysis and plantar force measurements were performed at the final follow-up. RESULTS: With an average follow-up of 10.2 years, patients showed significant improvement in functional and quality of life scores compared to pre-surgery. Preoperatively, all patients had knee valgus and ankle varus on the affected side. After THA, most parameters showed reduced valgus alignment, except for HKA and HLFC. On the unaffected side, MAD, aTFA, and HKA indicated preoperative valgus, which was fully corrected post-THA. Gait analysis revealed restricted lower limb motion and abnormal plantar force distribution that persisted postoperatively in Crowe IV DDH patients. CO...