https://scholars.lib.ntu.edu.tw/handle/123456789/483243
標題: | Ultrasonographic measurement of the mechanical properties of the sole under the metatarsal heads | 作者: | Wang, C.-L. Hsu, T.-C. Shau, Y.-W. JENG-YI SHIEH YIO-WHA SHAU |
公開日期: | 1999 | 出版社: | J Bone Jt Surgery Inc., Needham, MA, United States | 卷: | 17 | 期: | 5 | 起(迄)頁: | 709-713 | 來源出版物: | Journal of Orthopaedic Research | 摘要: | The sole under the metatarsal heads functions as a shock absorber during walking and running. The mechanical properties of the sole provide the primary defense against the development of metatarsalgia and foot ulceration. However, limited information about these properties has been documented. In this study, we used ultrasonography to evaluate the mechanical properties, including unloaded thickness, compressibility index, elastic modulus, and energy dissipation ratio, of the sole in 20 healthy subjects. The unloaded thickness decreased progressively from the first to the fifth metatarsal heads, with values of 1.50, 1.36, 1.25, 1.14, and 1.04 cm. The sole under the first metatarsal head had the greatest values for the compressibility index and elastic modulus (55.9% and 1.39 kg/cm2), and the sole under the third metatarsal head had the smallest values (50.8% and 1.23 kg/cm2). The sole under the fifth metatarsal head had the greatest energy dissipation ratio (33.7%), followed by that under the third, second, first, and fourth metatarsal heads. Multivariate adjusted linear regression showed that the unloaded thickness, compressibility index, and elastic modulus values increased significantly with age and body weight (p<0.05) and that the energy dissipation ratio increased significantly with body weight (p<0.05).The sole under the metatarsal heads functions as a shock absorber during walking and running. The mechanical properties of the sole provide the primary defense against the development of metatarsalgia and foot ulceration. However, limited information about these properties has been documented. In this study, we used ultrasonography to evaluate the mechanical properties, including unloaded thickness, compressibility index, elastic modulus, and energy dissipation ratio, of the sole in 20 healthy subjects. The unloaded thickness decreased progressively from the first to the fifth metatarsal heads, with values of 1.50, 1.36, 1.25, 1.14, and 1.04 cm. The sole under the first metatarsal head had the greatest values for the compressibility index and elastic modulus (55.9% and 1.39 kg/cm2), and the sole under the third metatarsal head had the smallest values (50.8% and 1.23 kg/cm2). The sole under the fifth metatarsal head had the greatest energy dissipation ratio (33.7%), followed by that under the third, second, first, and fourth metatarsal heads. Multivariate adjusted linear regression showed that the unloaded thickness, compressibility index, and elastic modulus values increased significantly with age and body weight (p < 0.05) and that the energy dissipation ratio increased significantly with body weight (p < 0.05). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033197577&doi=10.1002%2fjor.1100170513&partnerID=40&md5=d8266c064ee06b39f3ddd64c8588c83f https://scholars.lib.ntu.edu.tw/handle/123456789/483243 |
ISSN: | 0736-0266 | DOI: | 10.1002/jor.1100170513 | SDG/關鍵字: | Compressibility of solids; Elastic moduli; Energy dissipation; Ultrasonic applications; Compressibility index; Ultrasonography; Musculoskeletal system; adult; article; body mass; body weight; controlled study; echography; female; human; human experiment; male; mechanics; metatarsal bone; priority journal; young modulus |
顯示於: | 醫學系 |
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