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Surface Modification of Nickel/Titanium Alloy and Titanium Surfaces via a Polyelectrolyte Multilayer/Calcium Phosphate Hybrid Coating

✍ Scribed by Sylvia Schweizer; Thomas Schuster; Mathias Junginger; Gerd Siekmeyer; Andreas Taubert

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
699 KB
Volume
295
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

The report shows that simple LbL deposition of positively charged chitosan and negatively charged heparin can be used to efficiently modify the native surface of both NiTi and Ti without any previous treatments. Moreover, mineralization of the polymer multilayers with calcium phosphate leads to surfaces with low contact angles around 70 and 20° for NiTi and Ti, respectively. This suggests that a polymer multilayer/calcium phosphate hybrid coating could be useful for making NiTi or Ti implants that are at the same time antibacterial (via the chitosan), suppress blood clot formation (via the heparin), and favor fast endothelialization (via the improved surface hydrophilicity compared to the respective neat material).
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