Journal of Rehabilitation Research & Development (JRRD)

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Volume 48 Number 8, 2011
   Pages 987 — 1004

Abstract —  Tensile strength and impact resistance properties of materials used in prosthetic check sockets, copolymer sockets, and definitive laminated sockets

Maria J. Gerschutz, PhD;* Michael L. Haynes, MS; Derek M. Nixon, BS; James M. Colvin, MS

The Ohio Willow Wood Company, Mt. Sterling, OH

Abstract — Prosthetic sockets serve as the interface between people with amputations and their prostheses. Although most materials used to make prosthetic sockets have been used for many years, knowledge of these materials' properties is limited, especially after they are subjected to fabrication processes. This study evaluated tensile and impact properties of the current state-of-the-art materials used to fabricate prosthetic check sockets, copolymer sockets, and definitive laminated sockets. Thermolyn Rigid and Orfitrans Stiff check socket materials produced significantly lower tensile strength and impact resistance than polyethylene terephthalate glycol (PETG). Copolymer socket materials exhibited greater resistance to impact forces than the check socket materials but lower tensile strengths than PETG. The heated molding processes, for the check socket and copolymer materials, reduced both tensile strength and elongation at break. Definitive laminated sockets were sorted according to fabrication techniques. Nyglass material had significantly higher elongation, indicating a more ductile material than carbon-based laminations. Carbon sockets with pigmented resin had higher tensile strength and modulus at break than nonpigmented carbon sockets. Elongation at yield and elongation at break were similar for both types of carbon-based laminations. The material properties determined in this study provide a foundation for understanding and improving the quality of prosthetic sockets using current fabrication materials and a basis for evaluating future technologies.

Key words: amputee, carbon fiber, check socket, copolymer, definitive socket, diagnostic socket, elongation, impact resistance, laminate, materials, Orfitrans, PETG, prosthesis, prosthetic socket, tensile strength, Thermolyn.


View HTML  ¦  View PDF  ¦  Contents Vol. 48, No. 8
This article and any supplementary material should be cited as follows:
Gerschutz MJ, Haynes ML, Nixon DM, Colvin JM. Tensile strength and impact resistance properties of materials used in prosthetic check sockets, copolymer sockets, and definitive laminated sockets. J Rehabil Res Dev. 2011; 48(8):987-1004.
DOI:10.1682/JRRD.2010.10.0204
Crossref
1Gerschutz, Maria (The Ohio Willow Wood Company, Mt. Sterling, OH). Conversation with: Sales representative (Otto Bock Healthcare; Minneapolis, Minnesota). 2010 Jul 1.

Last Reviewed or Updated  Friday, October 14, 2011 9:48 AM

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