In vitro bioactivity and osteoblast response of porous NiTi synthesized by SHS using nanocrystalline Ni-Ti reaction agent

Journal of Biomedical Materials Research. Part a
Y W GuK A Khor

Abstract

Porous NiTi with an average porosity of 55 vol % and a general pore size of 100-600 microm was synthesized by self-propagating high temperature synthesis (SHS) with the addition of mechanically alloyed nanocrystalline Ni-Ti as the reaction agent. The SHS of porous NiTi using elemental powders was also performed for comparison. To enhance the bioactivity of the metal surface, porous NiTi synthesized by nanocrystalline Ni-Ti was subjected to chemical treatment to form a layer of TiO(2) coating. The porous NiTi with TiO(2) coating was subsequently immersed in a simulated body fluid (SBF) to investigate its apatite forming ability. The effects of the addition of nanocrystalline Ni-Ti as reaction agent and the application of apatite coating on osteoblastic behavior were studied in primary cultures of human osteoblast cells. Results showed that the main phases in porous NiTi synthesized by elemental powders were NiTi, Ti(2)Ni, and unreacted free Ni. By using nanocrystalline Ni-Ti as reaction agent, the secondary intermetallic phase of Ti(2)Ni was significantly reduced and the free Ni was eliminated. TiO(2) coating with anatase phase was formed on the surface of porous NiTi after the chemical treatment. A layer consisting of nanocryst...Continue Reading

References

Mar 1, 1990·Journal of Biomedical Materials Research·T KokuboT Yamamuro
Jun 1, 1990·Journal of Biomedical Materials Research·T KokuboT Yamamuro
Jan 5, 2002·Biomaterials·A KapanenJ Tuukkanen

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Citations

Jul 16, 2013·Journal of Materials Science. Materials in Medicine·Gladius Lewis
Aug 1, 2008·Journal of the Royal Society, Interface·M NavarroJ A Planell
Sep 2, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Dayangku Noorfazidah Awang ShriAkiko Yamamoto
Mar 20, 2008·Acta Biomaterialia·A BansiddhiD C Dunand
Nov 22, 2011·Journal of the Mechanical Behavior of Biomedical Materials·G Ipek NakaşSakir Bor

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