Department of Orthopedic Surgery, Fukuoka University Faculty of Medicine, Fukuoka, Japan.
J Arthroplasty. 2021 Sep;36(9):3089-3096. doi: 10.1016/j.arth.2021.04.019. Epub 2021 Apr 23.
Curved periacetabular osteotomy (CPO) is one of the periacetabular osteotomies for the treatment of acetabular dysplasia. Several complications have been described after CPO, however, there have been no reports on the leg length change (LLC). This study aimed to investigate the LLC after CPO and its impact on the clinical outcomes.
This study was a retrospective review of 70 consecutive hips in 67 patients with symptomatic acetabular dysplasia who underwent CPO between March 2016 and April 2019. Preoperative and postoperative leg lengths were measured using anteroposterior radiographs, and the clinical outcomes were evaluated based on the Harris hip score (HHS) and Medical Outcomes Survey 36-item Short Form Health Survey (SF-36).
The mean LLC (and standard deviation) after CPO was -0.08 ± 3.10 mm. The mean HHS significantly improved from 73.5 points to 91.9 points (P < .001). The physical component and role component scores of SF-36 significantly improved from 35.1 to 46.1 (P < .001) and from 39.5 to 47.0 (P < .001), respectively. No significant differences were found between the preoperative and postoperative mental component scores of SF-36. In addition, among 70 hips, 35 hips exhibited leg length elongation (0 to plus 6.82 mm) after CPO, whereas 35 hips exhibited leg length shortening (0 to minus 6.23 mm). No significant differences were found in HHS and SF-36 between the leg elongation group and leg shortening group.
The mean LLC after CPO was -0.08 ± 3.10 mm, and this change does not affect the postoperative clinical outcomes.
髋臼周围截骨术（CPO）是治疗髋臼发育不良的截骨术之一。CPO 后已经描述了几种并发症，但是，尚无关于肢体长度变化（LLC）的报道。本研究旨在探讨 CPO 后的 LLC 及其对临床结果的影响。
这是一项回顾性研究，共纳入了 2016 年 3 月至 2019 年 4 月期间接受 CPO 的 67 例有症状髋臼发育不良患者的 70 个髋关节。使用前后位 X 线片测量术前和术后的肢体长度，并根据 Harris 髋关节评分（HHS）和医疗结局研究 36 项简明健康调查量表（SF-36）评估临床结果。
CPO 后的平均 LLC（和标准差）为-0.08±3.10mm。HHS 平均显著从 73.5 分提高到 91.9 分（P＜0.001）。SF-36 的生理成分和角色成分评分分别从 35.1 分提高到 46.1 分（P＜0.001）和从 39.5 分提高到 47.0 分（P＜0.001）。SF-36 的心理成分评分术前和术后无显著差异。此外，在 70 个髋关节中，35 个髋关节在 CPO 后肢体长度延长（0 至+6.82mm），而 35 个髋关节肢体长度缩短（0 至-6.23mm）。肢体延长组和肢体缩短组之间 HHS 和 SF-36 无显著差异。
CPO 后的平均 LLC 为-0.08±3.10mm，这种变化不会影响术后临床结果。
