Characteristics of static and dynamic loading of the plantar surface of the foot in women with hallux valgus deformity

Abstract

Hallux valgus is one of the most common foot deformations, which occurs twice as frequently in women than in men. The aim of the study was to evaluate the feet soles pressure distribution pattern of young women with hallux valgus deformity. The study sample consisted of 23 young women (21-27 years). Among the participants, 14 demonstrated the presence of single- or double-sided hallux valgus (study group – a total of 22 feet with hallux valgus) and 15 women had the correct angle of the big toe for one or both feet (control group – a total of 23 feet without deformation). The research tool was the Podoscan 2D platform and the FreeMED force platform (Sensor Medica, Italy). Using the FreeStep Professional software on the plantocontourograms of the feet, the angle of hallux valgus was determined (ALFA angle). In statics the following parameters were assessed: maximal fore- and rear-foot loading, percentage loading of forefoot and the Weissflog indicator, and in dynamics (gait): the percentage loading of forefoot and medial part of the foot, the value of maximum foot pressure and the passage point of the center of pressure line. There were no differences between the study and control group regarding loading of the fore- and rear-foot or pressure distribution pattern on the lateral and medial side of the foot, however, statistically significant differences were observed in the value of the Weissflog indicator and the exit place of the center of pressure line. 1. Hallux valgus deformity changes the foot rollover pattern, in which instead of the big toe as the main place to transfer forces during the fi nal support phase, the increased load is transferred through the second foot ray. 2. hallux valgus promotes fl attening of the transverse arch of the foot. 3. changes in foot pressure pattern observed in the group of women with hallux valgus are not dependent on the valgus angle. Masłoń A., Czechowska D., Szczygieł E., Golec J. Characteristics of static and dynamic loading of the plantar surface of the foot in women with hallux valgus deformity. Med Rehabil 2016; 20(2): 5-12. DOI: 10.5604/01.3001.0009.4804

Keywords

• łuk poprzeczny stopy
• przodostopie
• tyłostopie
• linia centrów nacisków