个性化扁平足矫形鞋垫的生物力学研究

目的 研究不同结构和不同材料硬度的矫形鞋垫对扁平足的矫正效果。方法 利用Infoot设备扫描扁平足负重位和非负重位的外形轮廓。通过鞋垫式足底压力测试系统，比较3种矫形鞋垫内侧纵弓高度（类型Ⅰ、Ⅱ、Ⅲ）和3种材料硬度（30°、35°、42°）对扁平足的作用效果。结果 类型Ⅰ鞋垫对提高舟骨高度有效，且在硬度为35°时分散了足底压力集中的区域和增大了内侧足弓的承载面积。结论 合适的鞋垫对改善扁平足畸形有良好的矫正作用，研究结果 为个性化矫形鞋垫的设计应用提供理论基础。
Objective To study the effect from different structures and material hardness of orthopedic insoles on flatfoot correction. Methods The contours of flatfoot under weight-bearing and non-weight-bearing conditions were scanned by Infoot system. The 3 kinds of medial longitudinal arch height (typeⅠ, Ⅱ, Ⅲ) and 3 kinds of material hardness (30°, 35°, 42°) from orthopedic insoles were used to compare their effects on flatfoot by the embedded insole test system. Results TypeⅠorthopedic insoles could significantly restore the anatomical position by improving the height of navicular bone, and redistribute the concentrated plantar pressure and increase the loading area of medial longitudinal arch with material hardness of 35°. Conclusions The appropriate insole shows a favorable orthopedic effect to ameliorate the foot deformity of flatfoot patients. The research findings lay a theoretical basis on design of the personalized orthopedic insoles.