Background

Foot to ground pressure changes in total hip arthroplasty patients' gait are not widely described, although they are sensitive to gait abnormalities and the distribution of plantar pressures may differ before and after the surgery. This study aimed to analyse longitudinally differences in plantar pressure during gait in total hip arthroplasty patients compared to healthy controls.

Methods

Eighteen males participated in this study. Eight males, who underwent unilateral total hip arthroplasty, participated at the data collection three times: 4 weeks before the surgery, 12 and 24 weeks after, and ten healthy controls. All participants were asked to walk over Emed platform. To compare differences between the affected and unaffected limbs, Kolmogorov-Smirnov test was used. Kruskal-Wallis test was used to compare the difference between total hip arthroplasty patients and healthy controls.

Findings

Statistically significant differences between the affected and unaffected limb were observed only during the preoperative measurement in peak pressure at MH4 area and in the contact area at MH4 and big toe. When comparing total hip arthroplasty patients and controls, a difference in the contact time at MH2, MH3 and MH4 areas 12 weeks after surgery and at MH2 and MH4 24 weeks after the surgery were observed.

Interpretation

The shorter contact time at forefoot areas may indicate an alteration in the propulsive phase of the gait of both the affected limb and unaffected limb in total hip arthroplasty patients as a result of decreased terminal hip extension during the stance phase described in previous studies.

中文翻译：

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单侧全髋关节置换术前4周和术后12周和24周步态中足底压力、接触面积和接触时间对称性的变化

背景

全髋关节置换术患者步态的足对地压力变化并未得到广泛描述，尽管它们对步态异常很敏感，并且手术前后足底压力的分布可能不同。本研究旨在分析与健康对照组相比，全髋关节置换术患者步态过程中足底压力的纵向差异。

方法

十八名男性参加了这项研究。8 名接受单侧全髋关节置换术的男性参与了 3 次数据收集：术前 4 周、术后 12 周和 24 周，以及 10 名健康对照。所有参与者都被要求走过 Emed 平台。为了比较受影响和未受影响的肢体之间的差异，使用了 Kolmogorov-Smirnov 检验。Kruskal-Wallis 检验用于比较全髋关节置换术患者与健康对照组之间的差异。

发现

仅在术前测量 MH4 区域以及 MH4 和大脚趾的接触区域的峰值压力期间观察到受影响和未受影响的肢体之间的统计学显着差异。在比较全髋关节置换术患者和对照组时，观察到术后 12 周在 MH2、MH3 和 MH4 区域以及术后 24 周在 MH2 和 MH4 区域的接触时间存在差异。

解释

前足区域较短的接触时间可能表明全髋关节置换术患者的受影响肢体和未受影响肢体的步态推进阶段发生了变化，这是由于先前研究中描述的站立期末端髋关节伸展减少的结果。