Article

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.

Langue : ANGLAIS