Surface characteristics, mechanical properties, and cytocompatibility of oxygen plasma-implanted porous nickel titanium shape memory alloy
Good surface properties and biocompatibility are crucial to porous NiTi shape memory alloys (SMA) used in medical implants, as possible nickel release from porous NiTi may cause deleterious effects in the human body. In this work, oxygen plasma immersion ion implantation (O‐PIII) was used to reduce...
Saved in:
Published in | Journal of biomedical materials research. Part A Vol. 79A; no. 1; pp. 139 - 146 |
---|---|
Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.10.2006
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Good surface properties and biocompatibility are crucial to porous NiTi shape memory alloys (SMA) used in medical implants, as possible nickel release from porous NiTi may cause deleterious effects in the human body. In this work, oxygen plasma immersion ion implantation (O‐PIII) was used to reduce the amount of nickel leached from porous NiTi alloys with a porosity of 42% prepared by capsule‐free hot isostatic pressing. The mechanical properties, surface properties, and biocompatibility were studied by compression tests, X‐ray photoelectron spectroscopy (XPS), and cell culturing. The O‐PIII porous NiTi SMAs have good mechanical properties and excellent superelasticity, and the amount of nickel leached from the O‐PIII porous NiTi is much less than that from the untreated samples. XPS results indicate that a nickel‐depleted surface layer predominantly composed of TiO2 is produced by O‐PIII and acts as a barrier against out‐diffusion of nickel. The cell culturing tests reveal that both the O‐PIII and untreated porous NiTi alloys have good biocompatibility. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2006 |
---|---|
Bibliography: | istex:DB93FDF6B93CBAE592D43D9313F57DD87E280263 Hong Kong Research Grants Council (RGC) Central Allocation Group Research - No. CityU 1/04C ArticleID:JBM30705 ark:/67375/WNG-FWFDX4JG-G ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 1549-3296 1552-4965 |
DOI: | 10.1002/jbm.a.30705 |