Remarkable biocompatibility enhancement of porous NiTi alloys by a new surface modification approach : In-situ nitriding and in vitro and in vivo evaluation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

17 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)544-553
Journal / PublicationJournal of Biomedical Materials Research - Part A
Volume99 A
Issue number4
Publication statusPublished - 15 Dec 2011

Abstract

An in-situ nitriding method has been developed to modify the outer surface and the pore walls of both open and closed pores of porous NiTi shape memory alloys (SMAs) as part of their sintering process. XRD and XPS examinations revealed that the modified layer is mainly TiN. The biocompatibility of the in-situ nitrided sample has been characterized by its corrosion resistance, cell adherence, and implant surgery. The in-situ nitrided porous NiTi SMAs exhibit much better corrosion resistance, cell adherence, and bone tissue induced capability than the porous NiTi alloys without surface modification. Furthermore, the released Ni ion content in the blood of rabbit is reduced greatly by the in-situ nitriding. The excellent biocompatibility of in-situ nitrided sample is attributed to the formation of the TiN layer on all the pore walls including both open and closed pores. Copyright © 2011 Wiley Periodicals, Inc.

Research Area(s)

  • biocompatibility, in-situ nitriding, NiTi, porous shape memory alloys

Citation Format(s)

Remarkable biocompatibility enhancement of porous NiTi alloys by a new surface modification approach : In-situ nitriding and in vitro and in vivo evaluation. / Li, H.; Yuan, B.; Gao, Y.; Chung, C. Y.; Zhu, M.

In: Journal of Biomedical Materials Research - Part A, Vol. 99 A, No. 4, 15.12.2011, p. 544-553.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review