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Impact Characteristics of Multi-Density Insoles for DM Shoes  

금영광 (연세대학교 의공학부)
정임숙 (연세대학교 의공학연구소)
강성재 (연세대학교 의용계측 및 재활공학 연구센터)
김영길 (오산대학 테크노신발과)
김명웅 (오산대학 신발공학연구소)
김영호 (연세대학교 첨단의료기기 기술혁신센터)
Publication Information
Journal of Biomedical Engineering Research / v.24, no.1, 2003 , pp. 31-36 More about this Journal
Abstract
Impact characteristics of six DM(Diabetes Mellitus) shoe insole materials (Podian, Plastazote black, Plastazote white, Flexible PU foam, Podialene 200 blue and Podia flex) and three multi-density insoles (AP, OS and PW insoles) were determined in the present study, using a self-designed impact measurement system. The coefficient of restitution, the median frequency and the attenuation index were calculated for each material, based on impact forces and linear accelerations. Podian revealed the superiority in the coefficient of restitution and the attenuation index. The median frequency of the Flexible PU foam was the smallest. Results also showed that the heel region was the most impact-attenuated among other areas in the insole. OS insole showed the better characteristics in the coefficient of restitution and the median frequency. but there was no significant difference in the attenuation index. Similar impact characteristics were found in all areas in PW insole. since it was basically of the same dual-density polyurethane.
Keywords
Impact characteristic; DM(Diabetes Mellitus) shoe insole; Coefficient of restitution; Median frequency; Attenuation index;
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