Advances in Biomedical Sciences and Engineering

Advances in Biomedical Sciences and Engineering

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This authoritative reference provides update information on the fundamental aspects and applications of biomaterials and biomedical sciences. It includes nickel-titanium alloys with superelasticity ...
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Plasma Surface Modification of Nickel Titanium Shape Memory Alloys

Pp. 45-68 (24)

Kelvin Wai-Kwok Yeung, Kenneth MC Cheung, Keith Dip-Kei Luk, Shuilin Wu, Xuanyong Liu, Chenglin Chu, Chi Yuan Chung and Paul Kim-Ho Chu

Abstract

Nickel-titanium (NiTi) shape memory alloys are very potential for surgical implantation due to two unique properties: super-elasticity and shape memory effect. These advantages cannot be seen in current biomedical metallic materials such as medical grade titanium alloys and stainless steels. However, nickel ion release remains a major concern particularly for large implants placed on the spine or joints, as fretting is always expected at such implant junctions. Therefore, an advanced surface treatment using plasma immersion ion implantation (PIII) technology to tackle this issue

Affiliation:

Division of Spine Surgery, Department of Orthopedics & Traumatology, The University of Hong Kong, Hong Kong.