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Biomimetic apatite coatings on micro-arc oxidized titania

Paper ID Volume ID Publish Year Pages File Format Full-Text
13010 828 2004 9 PDF Available
Title
Biomimetic apatite coatings on micro-arc oxidized titania
Abstract

Biomimetic apatite coatings on micro-arc oxidized titania films were investigated and their apatite-inducing ability was evaluated in a simulated body fluid (1.0SBF) as well as in a 1.5 times concentrated SBF (1.5SBF). Titania-based films on titanium were prepared by micro-arc oxidation at various applied voltages (250–500 V) in an electrolytic solution containing β-glycerophosphate disodium salt pentahydrate (β-GP) and calcium acetate monohydrate (CA). Macro-porous, Ca- and P-containing titania-based films were formed on the titanium substrates. The phase, Ca and P content, morphology, and thickness of the films were strongly dependent on the applied voltage. In particular, Ca- and P-containing compounds such as CaTiO3, β-Ca2P2O7 and α-Ca3(PO4)2 were produced at higher voltages (>450 V). When immersed in 1.0SBF, a carbonated hydroxyapatite was induced on the surfaces of the films oxidized at higher voltages (>450 V) after 28 days, which is closely related to the Ca- and P-containing phases. The use of 1.5SBF shortened the apatite induction time and apatite formation was confirmed even on the surface of the films oxidized at 350 V, which suggests that the incorporated Ca and P in the titania films play a similar role to the Ca- and P-containing compounds in the SBF.

Keywords
Biomimetic; Micro-arc oxidation; Apatite; Bioactivity; Simulated body fluid
First Page Preview
Biomimetic apatite coatings on micro-arc oxidized titania
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 17, August 2004, Pages 3341–3349
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering