拇外翻对前足底压力分布的改变

Distribution changes of forefoot plantar pressure in hallux valgus

目的研究拇外翻对前足底压力的分布改变,为拇外翻的临床治疗和康复提供具有参考价值的生物力学结果。方法随机选取拇外翻患者17人,共34足作为实验组;选取健康成人17人,34足作为对照组。分别采用Footscan足底压力测试系统进行动态测试,将前足底5个跖骨头分别作为研究区域,通过比较拇外翻患者与对照组之间的区域峰压强(PP)和压强时间积分(PTI)来评估行走状态下前足底压力变化。结果拇外翻足的PP和PTI最大值均位于第3跖骨头下,分别为:(24.01依12.33)Pa,(6.89依3.02);而正常足则位于第二跖骨头下,分别为:(16.79依7.65)Pa,(6.03依2.72)。结论拇外翻足的前足底压力分布与正常足有显著性差异,拇外翻足出现压力中心外移现象。

Objective To investigate the changes of distribution of plantar pressure in Hallux Valgus and provide laboratory proof for clinical therapy and rehabilitation of hallux valgus.Method 17 cases of hallux valgus with 34 involved feet were examined.17 persons with normal feet were choosen as control group.Forefoot plantar pressure was measured during walking by Footscan system.The forefoot was divided into five regions according to the five metatarsals.The parameters,peak pressure（PP） and pressure time integral（PTI） of the five regions,were compared to evaluate the plantar pressure changes while walking.Results Forefoot plantar pressure distribution of hallux valgus is quite different from that of normal feet.Among five regions PP and PTI under the third metatarsal are maximum,which was（24.01±12.33）Pa,（6.89±3.02） respectively.While the maximum of normal feet was under the second metatarsal,which was（16.79±7.65）Pa,（6.03±2.72） respectively.Conclusions There are biomechanical differences between hallux valgus and normal feet which can be embodied by the distribution of plantar pressure.The center of plantar pressure distribution obviously shifts from interior to exterior.