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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术后十二周和青春期女性恢复运动时，前十字韧带重建对pa股关节应力和下肢生物力学的影响。

背景

这项研究的目的是检查术后12周和恢复运动时四肢之间的前十字韧带重建后与with股股骨疼痛相关的运动学和动力学差异。

方法

24名青春期女性在手术后12周以及在进行RTS评估时，在每条肢体上连续完成了5次单腿下蹲。计算膝关节屈曲45度时的峰值膝关节伸展力矩，峰值髋关节内收角和pa股关节应力。分别进行了两个重复的两次方差分析。

发现

膝关节伸展力矩存在显着的相互作用（四肢×时间）（p  <0.001）。手术后肢体的膝关节伸展力矩明显小于非手术肢体（p  <0.001）。在12周时，手术肢明显少于非手术肢（p  <0.001），另外，在恢复运动时，手术肢比12周时明显更大（p  <0.001）。肢体对髋关节内收角有明显的主要作用（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pa股关节压力也有主要影响。重返运动明显大于12周，而手术肢明显少于非手术肢（手术= 4.93（SE 0325）MPa，非手术= 5.29（SE 0.30）MPa）。

解释

遵循ACL-R的参与者的手术肢体显示出与pa股股骨疼痛的发展有关的变量。