Comparison of the Changes in the Structure of the Transverse Arch of the Normal and Hallux Valgus Feet under Different Loading Positions

摘要

The transverse arch of the foot receives and transfers loads during gait. We aim to identifythe difference in its structure between normal feet and hallux valgus (HV) feet and the effects ofloading. Two groups, Without-HV and With-HV (HV ≥ 20?), were assessed using a weight-bearingplantar ultrasound imaging device to view the structure of the transverse arch. Measurements wererecorded in sitting, quiet standing, and 90% weight-shift (90% W.S.) loading positions on the testedfoot. Images were then processed using ImageJ software to analyze the transverse arch length (TAL),the length between the metatarsal heads (MTHs), transverse arch height (TAH), and the height ofeach MTH. TAL significantly increased in all positions in the With-HV group compared to that in theWithout-HV group. It also increased in both groups under loading. TAH was not significantly higherin the With-HV group than in the Without-HV group in sitting and standing positions, except in the90% W.S position, where both groups showed similar results. TAH decreased in both groups underloading. In summary, the structure of the transverse arch changes in HV feet and under loadingconditions. This finding will help understand the structural differences between normal and HV feetand help resolve shoe fit problems in individuals with HV deformity.