Thirty-one materials have been tested in compression in order to generate the stress (force per unit of cross-sectional area) versus strain (deformation) behaviour, for the purpose of assessing the suitability of various foamed plastics and rubbers as shoe insole materials. It was found that the materials could be classified into three distinct categories (very stiff, moderately deformable and very deformable) according to the shape of the characteristic stress versus strain curve. The moderately deformable group has been selected as the most promising for clinical application.
References
1.
AdamsJ. C. Arthritis and Back Pain. University Park Press, Baltimore, Maryland1973
2.
BroadleyH. M. Management of the foot in rheumatoid arthritis. Occ. Ther.1974; 37(1))4–9
3.
GodfreyC. M.LawsonG. A.StewartW. A. A method for determination of pedal pressure changes during weight bearing: preliminary observations in normal and arthritic. feet. Arthritis Rheum.1967; 10(2))135–140
4.
HollanderJ. L. The Arthritis Handbook–A Problem Oriented Approach to Arthritis Management. Merk, Sharp and Dohme, West Point, Pennsylvania1974
5.
HollinosworthJ. W. Management of Rheumatoid Arthritis and its Complications. Year Book Medical Publishers Inc., Chicago1978
