Gao Guanying, Zhou Xiang, Jiesisibieke Dina, Zhang Zhu, Wang Jianquan, Xu Yan
Department of Sports Medicine, Institute of Sports Medicine of Peking University, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Beijing Key Laboratory of Sports Injuries, Beijing, China.
J Orthop Traumatol. 2025 Sep 24;26(1):57. doi: 10.1186/s10195-025-00873-8.
To identify the correlation between the iliocapsularis muscle and other imaging parameters, with the aim of enhancing understanding of its function and primarily exploring the influence on hip stability and function.
We retrospectively evaluated patients who attended the sports medicine clinic of our department and who underwent arthroscopic surgery for femoroacetabular impingement (FAI) between January 2019 and December 2020. Preoperative supine anteroposterior hip radiography, 45° Dunn view radiographs, computed tomography (CT), and magnetic resonance imaging (MRI) were performed in all patients. The alpha angle and lateral center-edge angle, femoral and acetabular version, were measured on radiographs and CT. Cross-sectional area, thickness, width, and circumference of the iliocapsularis were measured on MRI. The thickness of the hip capsule was assessed in the midcoronal plane relative to the femoral head at three specific locations: at the level of the femoral head-neck junction, at a point midway between the midcapsule and the labrum), and at a point equidistant towards the greater trochanter. The Pearson correlation coefficient was used to test for the association between the imaging parameters and dimensions of the iliocapsularis muscle.
A total of 120 patients (48 men and 72 women) were finally included in this study. There was a significant correlation between the dimensions of the iliocapsularis muscle and femoral version and Mckibbin index. Femoral version had a negative correlation between cross-sectional area (r = -0.28, P = 0.0045), thickness (r = -0.20, P = 0.043), width (r = -0.24, P = 0.012), and circumference (r = -0.27, P = 0.0052) of the iliocapsularis muscle. Mckibbin index also had negative correlation with cross-sectional area (r = -0.28, P = 0.0039), thickness (r = -0.27, P = 0.0054), width (r = -0.22, P = 0.025), and circumference (r = -0.26, P = 0.0075) of the iliocapsularis muscle. Besides, there was a significant correlation between the thickness of the iliocapsularis muscle and central acetabular version (r = -0.22, P = 0.025). No correlation was found between dimensions of the iliocapsularis muscle and alpha angle, lateral center-edge angle (LCEA), cranial acetabular version, and capsular thickness.
Our study revealed a negative correlation between femoral version, the Mckibbin index, and various morphological parameters of the iliocapsularis muscle, including cross-sectional area, thickness, width, and circumference. Higher levels of femoral version and the Mckibbin index were associated with a potential reduction in the dimensions of the iliocapsularis muscle. These findings suggest a biomechanical relationship between hip morphology and the structural characteristics of the iliocapsularis muscle, highlighting the importance of considering these factors in the assessment of hip stability and function.
确定髂股韧带与其他影像学参数之间的相关性，以增强对其功能的理解，并主要探索其对髋关节稳定性和功能的影响。
我们回顾性评估了2019年1月至2020年12月期间在我院运动医学门诊就诊并因股骨髋臼撞击症（FAI）接受关节镜手术的患者。所有患者均进行了术前仰卧位髋关节前后位X线摄影、45°邓恩位X线片、计算机断层扫描（CT）和磁共振成像（MRI）。在X线片和CT上测量α角和外侧中心边缘角、股骨和髋臼旋转角度。在MRI上测量髂股韧带的横截面积、厚度、宽度和周长。在相对于股骨头的中冠状面的三个特定位置评估髋关节囊的厚度：在股骨头-颈交界处水平、在关节囊中点与盂唇之间的中点处，以及在向大转子等距的一点处。采用Pearson相关系数检验影像学参数与髂股韧带尺寸之间的关联。
本研究最终纳入120例患者（48例男性和72例女性）。髂股韧带尺寸与股骨旋转角度和麦基宾指数之间存在显著相关性。股骨旋转角度与髂股韧带的横截面积（r = -0.28，P = 0.0045）、厚度（r = -0.20，P = 0.043）、宽度（r = -0.24，P = 0.012）和周长（r = -0.27，P = 0.0052）呈负相关。麦基宾指数与髂股韧带的横截面积（r = -0.28，P = 0.0039）、厚度（r = -
