The length of the popliteus on sagittal views correlates with high tibiofemoral rotations and patellar instability

IF 1.6 4区医学 Q3 ORTHOPEDICS

Knee Pub Date : 2025-03-03 DOI:10.1016/j.knee.2025.02.003

Shelby T. Desroches , Nancy Park , David B. Frumberg , John P. Fulkerson , Johannes M. Sieberer

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引用次数: 0

Abstract

Purpose

This study evaluates the relationship between tibiofemoral rotation and the length of the popliteus on sagittal views to assess if there are significant length differences in the popliteus with different degrees of rotation.

Methods

MRIs were analyzed from two age-sex-matched cohorts: patellofemoral instability (PFI) patients and controls. Tibiofemoral rotation was measured by recording the angle between the femoral and tibial condylar lines. The popliteus length was measured by subtracting the distance from the popliteus sulcus to the femoral condyle and the sulcus to the posterior tibia on sagittal slices. Interrater reliability was calculated using intraclass correlation coefficients (ICC), a regression analysis described relationships between the metrics, and a Mann-Whitney U test compared median differences between cohorts. A significance level of 0.05 was used for all analyses.

Results

There were statistically significant positive relationships between rotation and length overall (

r^{2}

= 0.49, p < 0.001), for the patient group (

r^{2}

= 0.35, p < 0.001) and for the control group (

r^{2}

= 0.52, p < 0.001). There was a significant difference between the PFI and control group for the rotation (p < 0.001) and length (p = 0.002). In total, seventy knees were included, 35 patients and 35 controls. The ICC for the rotation and length measurements were 0.87 (CI: 0.77–0.93) and 0.94 (CI: 0.89–0.97) respectively.

Conclusion

This study identified increased popliteus length associated with increased external tibiofemoral rotation as seen in patella instability patients. These findings demonstrate a further need to investigate the implications of advancing the popliteus for treatment of high tibiofemoral rotations.

查看原文本刊更多论文

矢状切面上腘绳肌的长度与胫股骨高度旋转和髌骨不稳定性有关

目的本研究评估了矢状切面上胫骨股骨旋转与腘绳肌长度之间的关系，以评估不同旋转程度的腘绳肌是否存在显著的长度差异。方法分析了两个年龄性别匹配的组群：髌骨股骨不稳（PFI）患者和对照组的 MRI 图像。通过记录股骨髁线和胫骨髁线之间的角度来测量胫骨股骨旋转。腘绳肌长度的测量方法是在矢状切片上减去腘绳肌沟到股骨髁的距离和腘绳肌沟到胫骨后端的距离。使用类内相关系数（ICC）计算相互之间的可靠性，回归分析描述指标之间的关系，曼-惠特尼U检验比较组群之间的中位数差异。所有分析的显著性水平均为 0.05。结果总体而言，旋转和长度之间存在显著的正相关关系（r2 = 0.49，p < 0.001），患者组（r2 = 0.35，p < 0.001）和对照组（r2 = 0.52，p < 0.001）也是如此。在旋转（p <0.001）和长度（p = 0.002）方面，PFI 组与对照组存在明显差异。总共纳入了 70 个膝关节，其中 35 个是患者，35 个是对照组。旋转和长度测量的 ICC 分别为 0.87（CI：0.77-0.93）和 0.94（CI：0.89-0.97）。这些发现表明，有必要进一步研究推进腘绳肌对治疗胫骨股骨高度旋转的影响。

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

Knee 医学-外科

CiteScore

3.80

自引率

5.30%

发文量

171

审稿时长

6 months

期刊介绍： The Knee is an international journal publishing studies on the clinical treatment and fundamental biomechanical characteristics of this joint. The aim of the journal is to provide a vehicle relevant to surgeons, biomedical engineers, imaging specialists, materials scientists, rehabilitation personnel and all those with an interest in the knee. The topics covered include, but are not limited to: • Anatomy, physiology, morphology and biochemistry; • Biomechanical studies; • Advances in the development of prosthetic, orthotic and augmentation devices; • Imaging and diagnostic techniques; • Pathology; • Trauma; • Surgery; • Rehabilitation.