Background

The purpose of this study was to examine kinematic and kinetic differences associated with patellofemoral pain after anterior cruciate ligament reconstruction between limbs at 12-week post-surgery and at time of return to sport.

Method

Twenty-four adolescent females completed 5 consecutive single leg squats on each limb at 12-weeks post-surgery and again during their RTS assessment. Peak knee extension moment, peak hip adduction angle, and patellofemoral joint stress at 45 degrees of knee flexion were calculated. Separate two by two repeated measures ANOVA were performed.

Findings

There was a significant interaction (limb × time) for knee extension moment (p < 0.001). Surgical limb knee extension moment was significantly less than the non-surgical limb at return to sport (p < 0.001). At 12-weeks the surgical limb was significantly less than non-surgical limb (p < 0.001), additionally the surgical limb was significantly greater at time of return to sport than at 12 weeks (p < 0.001). There was a significant main effect of limb for hip adduction angle (p = 0.002). Surgical limb was significantly greater than non-surgical limb (Surgical = 9.84 (SE 1.53) degree, non-surgical = 4.79 (SE 1.01) degree). There was also a main effect of time and limb for patellofemoral joint stress. Return to sport was significantly greater than 12 weeks and the surgical limb was significantly less than non-surgical limb (Surgical = 4.93 (SE 0325) MPa, Nonsurgical = 5.29 (SE 0.30) MPa).

Interpretation

The surgical limb of participants following ACL-R demonstrated variables that have been associated with the development of patellofemoral pain.

中文翻译：

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前十字韧带重建对青春期女性术后 12 周和恢复运动时髌股关节应力和下肢生物力学的影响。

 背景

本研究的目的是检查手术后 12 周和恢复运动时四肢之间前十字韧带重建后与髌股疼痛相关的运动学和动力学差异。

 方法

24 名青春期女性在术后 12 周以及 RTS 评估期间完成了每条肢体连续 5 次单腿深蹲。计算膝关节伸直峰值力矩、髋关节内收峰值角以及膝关节屈曲 45 度时的髌股关节应力。进行分开的两两重复测量方差分析。

 发现

膝关节伸展力矩存在显着的交互作用（肢体 × 时间）（ p < 0.001）。在恢复运动时，手术肢体的膝关节伸展力矩显着小于非手术肢体 ( p < 0.001)。第 12 周时，手术肢体明显小于非手术肢体 ( p < 0.001)，此外，恢复运动时手术肢体明显大于 12 周时 ( p < 0.001)。肢体对髋内收角有显着的主效应（ p = 0.002）。手术肢体明显大于非手术肢体（手术 = 9.84 (SE 1.53) 度，非手术 = 4.79 (SE 1.01) 度）。时间和肢体对髌股关节应力也有主要影响。恢复运动时间显着大于 12 周，手术肢体显着低于非手术肢体（手术 = 4.93 (SE 0325) MPa，非手术 = 5.29 (SE 0.30) MPa）。

 解释

ACL-R 后参与者的手术肢体表现出与髌股疼痛发生相关的变量。