Garcia-Lopez Edgar, Halvorson Ryan T, Foley Aidan J, Zhang Alan L, Wong Stephanie E
Orthopaedic Surgery Department, University of California San Francisco, San Francisco, California, USA.
Orthop J Sports Med. 2025 May 26;13(5):23259671251339777. doi: 10.1177/23259671251339777. eCollection 2025 May.
Femoroacetabular impingement syndrome (FAIS) is common in athletes, and the effect of biomechanics and biomechanical alterations after hip arthroscopy continues to be investigated. This study aimed to assess the effect of hip arthroscopy on biomechanical function in patients with FAIS during gait, stair ascent, and stair descent.
Patients with FAIS would exhibit decreased motion preoperatively compared with contralateral asymptomatic hips, but these differences would be corrected postoperatively and these changes would correlate to improvements in patient-reported outcome measures (PROMs).
Case series; Level of evidence, 4.
Ten patients undergoing hip arthroscopy for FAIS were included and completed PROMs as well as kinematic assessment at baseline and 1 year postoperatively. 3D motion tracking was performed using a 10-camera system while patients performed gait, stair ascent, and stair descent. Joint kinematic parameters were calculated in the sagittal, coronal, and transverse planes for the symptomatic and contralateral side. Peak and valley angles for each joint during each task were compared between limbs using linear mixed-effects models. Significant changes in kinematics were correlated to PROMs.
Preoperatively, the symptomatic hip demonstrated significant deficits in gait and stair ascent compared with the contralateral hip. During gait, hip kinematics increased compared with before surgery with respect to flexion (+7.7°± 7.3°), abduction (+2.4°± 3.2°), and external rotation (ER) (+3.0°± 4.9°) ( < .01). During stair ascent, hip abduction (+2.8°± 1.7°) and ER (+2.8°± 5.7°) were significantly increased ( < .01). During stair descent, hip flexion (+2.5°± 6.4°), extension (+3.9°± 8.3°), abduction (+2.3°± 2.6°), and ER (+4.8°± 4.3°) were significantly increased ( < .01). Significant improvements were seen in patient-reported outcomes, but these did not correlate to hip kinematics.
Hip arthroscopy for FAIS improved hip flexion, abduction, and ER during dynamic tasks such as gait, stair ascent, and stair descent comparable with the contralateral extremity. Additionally, patients reported significant improvement in function and pain at 1 year postoperatively, but these improvements did not correlate with improvements in hip kinematics.
股骨髋臼撞击综合征（FAIS）在运动员中很常见，髋关节镜检查后的生物力学及生物力学改变的影响仍在研究中。本研究旨在评估髋关节镜检查对FAIS患者在步态、上楼梯和下楼梯过程中生物力学功能的影响。
与对侧无症状髋关节相比，FAIS患者术前活动度会降低，但这些差异术后会得到纠正，且这些变化与患者报告的结局指标（PROMs）的改善相关。
病例系列；证据等级，4级。
纳入10例行髋关节镜治疗FAIS的患者，在基线和术后1年完成PROMs以及运动学评估。患者进行步态、上楼梯和下楼梯时，使用10台摄像机系统进行三维运动跟踪。计算症状侧和对侧在矢状面、冠状面和横断面的关节运动学参数。使用线性混合效应模型比较各任务期间每个关节的肢体间峰值和谷值角度。运动学的显著变化与PROMs相关。
术前，与对侧髋关节相比，症状侧髋关节在步态和上楼梯时有明显缺陷。在步态过程中，髋关节运动学相对于术前在屈曲（+7.7°±7.3°）、外展（+2.4°±3.2°）和外旋（ER）（+3.0°±4.9°）方面有所增加（P＜.01）。在上楼梯过程中，髋关节外展（+2.8°±1.7°）和ER（+2.8°±5.7°）显著增加（P＜.01）。在下楼梯过程中，髋关节屈曲（+2.5°±6.4°）、伸展（+3.9°±8.3°）、外展（+2.3°±2.6°）和ER（+4,8°±4.3°）显著增加（P＜.01）。患者报告的结局有显著改善，但这些与髋关节运动学无关。
FAIS的髋关节镜检查在动态任务如步态、上楼梯和下楼梯过程中改善了髋关节的屈曲、外展和ER，与对侧肢体相当。此外，患者在术后1年报告功能和疼痛有显著改善，但这些改善与髋关节运动学的改善无关。
