The purpose of this study was to compare foot pressure distribution between normal subjects and patients with hallux valgus and pes planus. Static and dynamic pressure, dynamic pressure-time integral, and relative impulse were measured from 75 normal adults, 12 patients with hallux valgus and 14 patients with pes planus by in-sole pressure measurement system. And static pressure distribution between forefoot and heel, changes of dynamic pressure according to age and body weight and percentage of contact time in each phase of gait cycle were also analyzed from normal subjects. The measurements were perfomed while standing and walking on their comfortable speed with in-sole pressure measurement system.
In normal subjects, the site of the greatest static and dynamic pressure, dynamic pressure-time integral and relative impulse were the 2nd and 3rd metatarsal head areas. and forefoot to heel load ratio was about 6:4 in static state. In analysis of contact time, the proportion of push-off phase was greatest. According to increment of age and body weight, dynanic pressure of mid-forefoot and mid-foot areas were increased.
In patients with hallux valgus, static and dynamic pressure, dynamic pressure-time integral and relative impulse of the 1st metatarsal and great toe areas were higher than those of normal subjects. In patients with pes planus, static and dynamic pressure, dynamic pressure-time integral and relative impulse of the mid-foot, 1st, 2nd, and 3rd metatarsal areas were higher than those of normal subjects.
