2014
DOI: 10.1007/s10856-014-5283-4
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Effect of surface modification by nitrogen ion implantation on the electrochemical and cellular behaviors of super-elastic NiTi shape memory alloy

Abstract: The aim of this investigation was to enhance the biological behavior of NiTi shape memory alloy while preserving its super-elastic behavior in order to facilitate its compatibility for application in human body. The surfaces of NiTi samples were bombarded by three different nitrogen doses. Small-angle X-ray diffraction was employed for evaluating the generated phases on the bombarded surfaces. The electrochemical behaviors of the bare and surface-modified NiTi samples were studied in simulated body fluid (SBF)… Show more

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Cited by 25 publications
(29 citation statements)
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“…In the end, the cellular response to materials depends on the specific cell types, materials processing, and testing conditions [10,32,60]. Furthermore, surface roughness, topography, and chemistry are crucial factors for cell adhesion, proliferation, and differentiation [3,8,14,61,62,63,64,65]. In our present in vitro study, the Ti6Al4V and NiTi alloys also differed strongly in roughness values.…”
Section: Discussionmentioning
confidence: 81%
“…In the end, the cellular response to materials depends on the specific cell types, materials processing, and testing conditions [10,32,60]. Furthermore, surface roughness, topography, and chemistry are crucial factors for cell adhesion, proliferation, and differentiation [3,8,14,61,62,63,64,65]. In our present in vitro study, the Ti6Al4V and NiTi alloys also differed strongly in roughness values.…”
Section: Discussionmentioning
confidence: 81%
“…R ct corresponds to the electric double layer at the metal‐coating interface, the nature of which is derived from the interaction of the corrosive ions and the metal substrate . By increasing the R ct , fewer ions can transfer through the electric double layer (at the substrat‐coating interface) . By applying the coating on the surface of the NiTi alloy, due to the increasing of the resistance coefficient of the coating, and increasing the resistance of the double layer resulted from the bonding on the surface of the metal (the bond between the atoms of the coating and the NiTi substrate), the corrosion resistance of the NiTi alloy improved .…”
Section: Resultsmentioning
confidence: 99%
“…The coated NiTi specimens (especially the NiTi coated with HA‐Ti‐MWCNTs) revealed a very high safety (regarding nickel ions release) in the body. The degree of biocompatibility of an implant is determined using the biological responses that occur at the surface of the implant in the body . The release of toxic ions from the implant into the body due to the corrosion reactions occur on its surface, will result in cytotoxicity as the toxic ions react with the surrounding tissue cells .…”
Section: Resultsmentioning
confidence: 99%
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