Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/1506
Title: | Wear and biomechanical characteristics of a novel shear-reducing insole with implications for high-risk persons with diabetes |
Authors: | Constantinides, Georgios Lavery, Lawrence A. Lanctot, Dan R. Zamorano, Ruben G. Athanasiou, Kyriacos A. Agrawal, Mauli Mauli |
metadata.dc.contributor.other: | Κωνσταντινίδης, Γιώργος |
Major Field of Science: | Engineering and Technology |
Field Category: | ENGINEERING AND TECHNOLOGY |
Keywords: | Polyethylene;Vinyl acetate;Biomechanics;Viscoelasticity |
Issue Date: | Aug-2005 |
Source: | Diabetes Technology and Therapeutics, 2005, vol. 7, no. 4, pp. 638-646 |
Volume: | 7 |
Issue: | 4 |
Start page: | 638 |
End page: | 646 |
Journal: | Diabetes Technology and Therapeutics |
Abstract: | Objective: This study was designed to measure pressure and shear reduction of a novel insole design. Methods: We compared three multilayer viscoelastic insoles to a novel insole design (GlideSoft®, Xilas Medical, Inc., San Antonio, TX). The bottom pad of each insole was fabricated from firm-density Plastazote® [Apex Foot Products (now Aetrex), South Hackensack, NJ] with an upper of Plastazote, ethyl vinyl acetate, or PORON® (Langer Biomechanics Group, Inc., Deer Park, NY). The GlideSoft design used the same materials with two intervening thin sheets of a low friction material. We measured foot pressures, shear, and material stiffness prospectively as the insoles aged during daily usage in 30 healthy adults. We used the F-Scan® (Tekscan, Inc., Boston, MA) to determine in-shoe foot pressures and the Automated Stress-relaxation Creep Indenter System (Xilas Medical) to measure material stiffness. To evaluate shear force, the insole was placed on the slide assembly of a custom-designed shear tester equipped with a reciprocating mechanism and force transducers. Results: The GlideSoft exhibited 57% less peak shear force than the standard insole (P < 0.05) in laboratory testing under simulated conditions. Ethyl vinyl acetate had higher compressive stiffness values than Plastazote and PORON at all test intervals (P < 0.05). There were no statistical differences between any of the insoles for peak in-shoe pressure measurements (P > 0.05). Conclusions: The GlideSoft design demonstrated a significant reduction in shear while maintaining equivalent pressure reduction compared with standard insole designs with three different material combinations for up to 320,000 steps. |
URI: | https://hdl.handle.net/20.500.14279/1506 |
ISSN: | 15209156 |
DOI: | 10.1089/dia.2005.7.638 |
Rights: | © Mary Ann Liebert |
Type: | Article |
Affiliation : | Scott and White Hospital University of Texas Rice University |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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