Int J Stomatol

Inter J Stomatol ›› 2010, Vol. 37 ›› Issue (02): 221-221～224.doi: 10.3969/j.issn.1673-5749.2010.02.027

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Surface modification of dental nickel-titanium shape memory alloys

XU Wei1, ZHAO Ke1, ZHANG Xinping2   

  1. 1. Research Institute of Stomatology, Hospital of Stomatology, Guanghua School of
  • Received:2009-02-19 Revised:2009-12-02 Online:2010-03-20 Published:2010-03-20
  • Contact: ZHAO Ke

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Abstract:

Nickel -titanium shape memory alloy（NiTi SMA） are regarded as a new type of biomaterials for prosthodontics and dental implants due to their unique properties, such as shape memory effect, superelasticity and adjustable Young′s modulus. However, the serious concerns about Ni-ion release of Ni-riched NiTi SMA have posed a great challenge for the clinical applications in biomedical field. Surface modifications and coatings can prevent Ni release effectively, improve its corrosion resistance and biocompatibility, which include surface oxidation treatments, surface coatings treatments, and ion implantation treatments, etc. This article provides a review of surface
modification methods, biomechanical properties and biocompatibilities for NiTi SMA.

Key words: nickel-titanium shape memory alloy, surface modification, biocompatibility

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