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This paper describes the use of nickle-titanium shape memory alloys as surgical implants to the patients undergoing scoliosis correction surgery. Toxic nickel particulate debris released from these materials, however, remains a major concern particularly pertaining to orthopaedic implants for which fretting is always expected at the implant junction. Therefore, the untreated ends were exposed and...
This study investigates the feasibility of apatite formation and the enhancement of Ni corrosion resistance in nitinol using combined sodium and oxygen plasma immersion ion implantation. X-ray photoelectron spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy are used to determine the elemental depth profiles, surface morphology, chemical composition, and reactivity of the...
In this work, a thin layer of TiO2 is produced on the NiTi surface using oxygen plasma immersion ion implantation (O-PIII), followed by anodization in electrolytes to induce the formation of a nanotubular layer. Finally, calcium PIII is conducted to fill the TiO2 nanotubes with calcium. Inductively-coupled plasma mass spectrometry (ICPMS) results reveal that nickel leaching can be effectively suppressed...
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