Regional differences in the mechanical properties of the plantar aponeurosis.

Autor: Isvilanonda V; RR&D Center for Limb Loss and MoBility (CLiMB), Department of Veterans Affairs, Seattle, WA, USA; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA., Li EY; RR&D Center for Limb Loss and MoBility (CLiMB), Department of Veterans Affairs, Seattle, WA, USA., Iaquinto JM; RR&D Center for Limb Loss and MoBility (CLiMB), Department of Veterans Affairs, Seattle, WA, USA; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA., Ledoux WR; RR&D Center for Limb Loss and MoBility (CLiMB), Department of Veterans Affairs, Seattle, WA, USA; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA; Department of Orthopaedics & Sports Medicine, University of Washington, Seattle, WA, USA. Electronic address: wrledoux@uw.edu.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2023 Apr; Vol. 151, pp. 111531. Date of Electronic Publication: 2023 Mar 07.
DOI: 10.1016/j.jbiomech.2023.111531
Abstrakt: The plantar aponeurosis functions to support the foot arch during weight bearing. Accurate anatomy and material properties are critical in developing analytical and computational models of this tissue. We determined the cross-sectional areas and material properties of four regions of the plantar aponeurosis: the proximal middle and distal middle portions of the tissue and the medial (to the first ray) and lateral (to the fifth ray) regions. Bone-plantar aponeurosis-bone specimens were harvested from fifteen cadaveric feet. Cross-sectional areas were measured using molding, casting, and sectioning methods. Mechanical testing was performed using displacement control triangle waves (0.5, 1, 2, 5, and 10 Hz) loaded to physiologic tension by estimating from body weight and area ratio of the region. Five specimens were tested for each region. Regional deformations were recorded by a high-speed video camera. There were overall differences in cross-sectional areas and biomechanical behavior across regions. The stress-strain responses are non-linear and mainly elastic (energy loss 3.6% to 7.2%). Moduli at the proximal middle and distal middle regions (400 and 522 MPa) were significantly higher than the medial and lateral regions (225 and 242 MPa). The effect of frequency on biomechanical outcomes was small (e.g., 3.5% change in modulus), except for energy loss (107% increase as frequency increased from 0.5 to 10 Hz). These results indicate that the plantar aponeurosis tensile response is non-linear, nearly elastic, and frequency independent. The cross-sectional area and material properties differ by region, and we suggest that such differences be included to accurately model this structure.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Published by Elsevier Ltd.)
Databáze: MEDLINE
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