正常足与外翻足前足承重比例与跖骨头下压力的研究

The study of the changes of bearing ratio and plantar pressure under forefoot of hallux valgus foot

目的 从生物力学角度探讨外翻足承重比例及跖骨头下压力的改变情况。方法将测试对象分为正常组(160足)、轻中度(足母)外翻组(100足)、重度(足母)外翻组(56足)三组,运用我所生物力学室研制的足底压力测试系统,对正常足与(足母)外翻足足底压力进行测试,并将结果进行统计分析。结果 轻中度(足母)外翻足前足承重比例较正常足增加,重度(足母)外翻足前足承重比例介于正常足与轻中度(足母)外翻足之间。(足母)外翻足存在着前足压力外移的趋势,这种改变和畸形的程度相关。结论 从生物力学角度证明,(足母)外翻前足承重比例及各跖骨头下压力的变化随(足母)外翻畸形程度增加出现不同程度的变化。

Objective To investigate the changes of bearing ratio and plantar pressure under forefoot of hallux valgus foot in the view of biomechanics Methods With the help of the foot pressure measurement system developed by our institute, the plantar pressure of feet(160 normal,100 mild and moderate hallux valgus, 56 severe hallux valgus) had been measured and acquired data were statistically analyzed. Results The bearing ratio of forefoot in mild-middle degree hallux valgus is larger than that in normal. The bearing ratio of forefoot in severe degree hallux valgus is between normal and mild-middle degree hallux valgus. There is a tendency in hallux valgus deformity that the pressure of forefoot moves outwards. This change is related with degree of deformity. Conclusion It is proved from biomechanical view that with the increase of deformity, bearing ratio of forefoot and pressure under metatarsals show different changes.