Background

Compensatory motion of foot joints in hallux rigidus (HR) are not fully known. This study aimed to clarify the kinematic compensation within the foot and to detect whether this affects plantar pressure distribution.

Methods

Gait characteristics were assessed in 16 patients (16 feet) with HR and compared with 15 healthy controls (30 feet) with three-dimensional gait analysis by using the multi-segment Oxford Foot Model, measuring spatio-temporal parameters, joint kinematics and plantar pressure.

Results

HR subjects showed less hallux plantar flexion during midstance and less hallux dorsiflexion during push-off, while increased forefoot supination was detected during push-off. No significant differences in plantar pressure were detected. Step length was significantly smaller in HR subjects, while gait velocity was comparable between groups.

Conclusions

HR significantly affects sagittal hallux motion, and the forefoot compensates by an increased supination during push-off. Despite this kinematic compensatory mechanism, no significant differences in plantar loading were detected.

中文翻译：

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症状性拇趾僵硬患者足代偿步态分析

背景

拇趾僵硬 (HR) 中足关节的补偿运动尚不完全清楚。本研究旨在阐明足内的运动代偿并检测这是否影响足底压力分布。

方法

对 16 名 HR 患者（16 英尺）的步态特征进行了评估，并与 15 名健康对照者（30 英尺）进行了比较，使用多节段牛津足模型进行三维步态分析，测量时空参数、关节运动学和足底压力.

结果

HR 受试者在站立中期显示较少的拇趾跖屈和在推离期间较少的拇背背屈，而在推离期间检测到前脚旋后增加。未检测到足底压力的显着差异。HR 受试者的步长明显更小，而步态速度在各组之间具有可比性。

结论

HR 显着影响矢状拇趾运动，并且前脚通过在推出期间增加的旋后来补偿。尽管存在这种运动补偿机制，但未检测到足底负荷的显着差异。