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Proceedings Paper

SMA: smart materials for medical applications
Author(s): T. Duerig; Dieter Stoeckel; D. Johnson
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Paper Abstract

The paper presents Nitinol, a Nickel-Titanium shape memory alloy, as a smart material for medical implants and devices. The atomistic nature of shape memory and superelasticity of Nitinol and the associated unique changes in mechanical properties are described. The smartness of the material is exemplified by its use for self-expanding stents. Caused by the stress hysteresis of superelastic Nitinol, these devices exhibit a biased stiffness behavior, i.e. they exert a low chronic outward force on the vessel wall, but resist external deformation with much higher forces. Some recent developments of thin film Nitinol stents and filters are also discussed.

Paper Details

Date Published: 13 March 2003
PDF: 9 pages
Proc. SPIE 4763, European Workshop on Smart Structures in Engineering and Technology, (13 March 2003); doi: 10.1117/12.508666
Show Author Affiliations
T. Duerig, Nitinol Devices & Components, Inc. (United States)
Dieter Stoeckel, Nitinol Devices and Components, Inc. (United States)
D. Johnson, TiNi Alloy Co. (United States)


Published in SPIE Proceedings Vol. 4763:
European Workshop on Smart Structures in Engineering and Technology
Brian Culshaw, Editor(s)

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