Shape memory phenomena is strictly related to the reversible martensitic transformation which occurred by cooling over stressing. The overview of some papers on biocompatibility and corrosion behaviour after passivation of NiTi alloys are presented. The shape memory effect and superelasticity application to medical purposes are described basing on the last published works. The advantage of the devices using the shape memory and pseudoelastic are stressed when compared to the traditional steel applications in medicine. Staples, stents, simon nitinol filter, Mammalok needle wire and Amplatzer septal occlusion device applications are illustrated and discussed.
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