Os acetabuli is an indirect radiographic sign of femoral retroversion.

IF 1.3 4区医学 Q3 ORTHOPEDICS

HIP International Pub Date : 2025-05-04 DOI:10.1177/11207000251335223

Pablo A Slullitel, Marcos Latorre, Francisco Principe, Felipe Patterson, Gerardo Zanotti, Fernando Comba, Martin A Buttaro

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引用次数: 0

Abstract

Background: To report the association between os acetabuli and relevant radiologic measurements in a series of surgically treated hip preservation patients.

Methods: We retrospectively reviewed 654 hips who underwent preservation surgery between 2012 and 2019, identifying 50 cases with os acetabuli (7.64%). We included 300 hips (277 patients) with radiographs and CT-scans obtained during preoperative assessment, after which the cohort was divided into two groups (with and without os acetabuli). Mean age of the study population was 35 (interquartile range [IQR] 28-42) years old, with 192 (62%) being males. 2 observers measured demographic and radiologic variables. A mixed-effects logistic regression tested the ability of radiologic measurements to predict the presence of os acetabuli.

Results: No between-group differences were found in terms of sex (156/250 vs. 36/50 males, p = 0.197), alpha angle (64 ± 13° vs. 65 ± 14°, p = 0.372), Tönnis angle (8 ± 7° vs. 7 ± 7°, p = 0.152), neck-shaft angle (132 ± 6° vs. 131 ± 5°, p = 0.199) and CT-acetabular version (16 ± 7° vs. 15 ± 6°, p = 0.221). Significant differences were found in terms of age (34 ± 9 vs. 39 ± 7 years, p = 0.002), lateral centre-edge angle (LCEA) (31 ± 9° vs. 34 ± 7°, p = 0.045), anterior wall index (AWI) (0.45 [IQR 0.37-0.54] vs 0.5 [IQR 0.39-0.6], p = 0.046), CT-femoral version (17 ± 5° vs. 8 ± 4°, p < 0.001), cross-over sign (96/250 vs. 28/50, p = 0.032) and baseline diagnosis (184/250 vs. 44/50 FAIs, p = 0.043), with the os acetabuli-group being older, with more FAI diagnosis/cross-over sign, and with higher LCEA, higher AWI, and a lower femoral version. After adjusting for confounders, only CT-femoral version (odds ratio 0.32; 95% CI. 0.14-0.73, p < 0.007) was associated with presence of os acetabuli.

Conclusions: Presence of acetabular rim fragments was significantly associated with a lower femoral version. Above 20° of femoral version, the likelihood of os acetabuli was almost zero. Treatment of os acetabuli (i.e., fixation vs. removal) should be adjusted for the underlying diagnosis.

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髋臼是股骨后翻的间接x线征象。

背景：报告一系列手术治疗的髋关节保留患者的髋臼骨与相关放射学测量之间的关系。方法：我们回顾性分析了2012年至2019年期间接受保存手术的654例髋关节，确定了50例无髋臼（7.64%）。我们纳入了300髋（277例患者），术前评估时获得了x线片和ct扫描，之后将队列分为两组（有和没有髋臼）。研究人群的平均年龄为35岁（四分位数间距[IQR] 28-42岁），其中192人（62%）为男性。2名观察员测量了人口统计学和放射学变量。混合效应逻辑回归测试了放射学测量预测髋臼骨缺失的能力。结果：性别（156/250比36/50，p = 0.197）、α角（64±13°比65±14°，p = 0.372）、Tönnis角（8±7°比7±7°，p = 0.152）、颈轴角（132±6°比131±5°，p = 0.199）和ct -髋臼版本（16±7°比15±6°，p = 0.221）组间无差异。年龄方面的显著差异被发现(34±9与39±7年,p = 0.002),横向centre-edge角(LCEA)(31±9°和34°±7,p = 0.045),前壁指数(AWI) (0.45 (IQR 0.37 - -0.54)和0.5 (IQR 0.39 - -0.6), p = 0.046), CT-femoral版本(17±5°和8±4°,p 0.001),交叉标志(96/250和28/50,p = 0.032)和基线诊断(184/250和44/50做,p = 0.043),与os acetabuli-group年纪大,有更多的FAI诊断/交叉符号,和LCEA更高,较高的AWI和较低的股骨版本。校正混杂因素后，只有ct -股骨版本(优势比0.32；95%可信区间。0.14-0.73, p 0.007)与髋臼骨脱落相关。结论：髋臼缘碎片的存在与股骨下位型显著相关。股骨内翻超过20°，髋臼骨折的可能性几乎为零。髋臼骨折的治疗（即固定或取出）应根据潜在的诊断进行调整。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

HIP International 医学-整形外科

CiteScore

4.20

自引率

0.00%

发文量

审稿时长

2 months

期刊介绍： HIP International is the official journal of the European Hip Society. It is the only international, peer-reviewed, bi-monthly journal dedicated to diseases of the hip. HIP International considers contributions relating to hip surgery, traumatology of the hip, prosthetic surgery, biomechanics, and basic sciences relating to the hip. HIP International invites reviews from leading specialists with the aim of informing its readers of current evidence-based best practice. The journal also publishes supplements containing proceedings of symposia, special meetings or articles of special educational merit. HIP International is divided into six independent sections led by editors of the highest scientific merit. These sections are: • Biomaterials • Biomechanics • Conservative Hip Surgery • Paediatrics • Primary and Revision Hip Arthroplasty • Traumatology