Background

Gluteal-tendon repair is reported to be effective for relieving pain and improving function in patients with gluteal-tendon tears. However, post-operative three-dimensional gait analysis has never been conducted in gluteal-tendon repair patients. Thus, our primary aim was to investigate how biomechanical gait parameters differ between age- and sex-matched participants with and without gluteal-tendon repair.

Methods

Vicon motion analysis technology was used to measure gait characteristics of 25 gluteal-tendon repair participants and 29 matched healthy comparison group participants. A generalised linear multivariate model was used to compare external hip-adduction moment, range of movement in hip adduction and internal rotation, pelvic obliquity, trunk lean, stride length and velocity of both cohorts throughout stance.

Findings

There were no differences between the groups in external hip adduction moment, pelvic obliquity and range of movement in hip adduction and internal rotation. Gluteal-tendon repair participants had a shorter stride length (P = 0.031) and reduced walking velocity (P = 0.015). Ipsilateral trunk lean was reduced in gluteal-tendon repair participants at the first-peak external hip-adduction moment (P = 0.016), mid-stance minimum external hip-adduction moment (P = 0.029) and second-peak external hip-adduction moment (P = 0.006).

Interpretation

There were no differences between the gluteal-tendon repair and comparison groups for external hip-adduction moment and pelvic obliquity. This suggests that gluteal-tendon repair may restore hip control in stance. Slower walking speed, reduced stride length and decreased ipsilateral trunk lean may reflect persistence of pre-operatively developed gait adaptations. Future studies of gait biomechanics before and after gluteal-tendon repair would be needed to substantiate this theory.

中文翻译：

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臀肌腱修复后的人的步态特征与健康人群相似

背景

据报道，臀肌腱修复可有效减轻臀肌撕裂患者的疼痛并改善其功能。然而，从未在臀肌腱修复患者中进行术后三维步态分析。因此，我们的主要目的是研究年龄匹配和性别匹配的参与者是否进行臀肌腱修复的生物力学步态参数如何不同。

方法

Vicon运动分析技术用于测量25位臀肌修复参与者和29位匹配的健康对照组的步态特征。使用广义线性多元模型比较外部髋关节内收力矩，髋关节内收和内旋转的运动范围，骨盆倾斜度，躯干倾斜度，步幅长度和整个队列中两个队列的速度。

发现

两组之间的外髋关节内收力矩，骨盆倾斜度以及内髋关节和内旋的运动范围没有差异。臀肌腱修复参与者的步幅较短（P  = 0.031），步行速度降低（P  = 0.015）。臀肌腱修复参与者在第一峰外侧髋关节内收弯矩（P  = 0.016），中间姿势最小外侧髋关节内弯矩（P  = 0.029）和第二峰外侧髋关节内弯矩减少（P  = 0.006）。

解释

臀肌腱修复组和对照组之间的外部髋关节内收力矩和骨盆倾斜度没有差异。这表明臀肌腱修复可以恢复髋关节姿势。较慢的步行速度，减小的步幅长度和减小的同侧躯干倾斜可能反映了术前发展的步态适应的持续性。为证实这一理论，需要对臀肌腱修复前后的步态生物力学进行进一步的研究。