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Apatite Formation on Electrochemically Treated Titanium

Published online by Cambridge University Press:  10 February 2011

K. Tsuru ,
S. Takemoto ,
S. Hayakawa  and
A. Osaka
K. Tsuru
Affiliation:
Biomaterials Lab, Faculty of Engineering, Okayama University, Tsushima, Okayama 700–8530 Japan
S. Takemoto
Affiliation:
Biomaterials Lab, Faculty of Engineering, Okayama University, Tsushima, Okayama 700–8530 Japan
S. Hayakawa
Affiliation:
Biomaterials Lab, Faculty of Engineering, Okayama University, Tsushima, Okayama 700–8530 Japan
A. Osaka
Affiliation:
Biomaterials Lab, Faculty of Engineering, Okayama University, Tsushima, Okayama 700–8530 Japan
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Abstract

Apatite formation on artificial materials in a body environment is the prerequisite condition for showing bioactivity i.e. bone-bonding ability. A specific hydrated silica or titania gel has the ability of apatite deposition in body environment. We electrochemically prepared such a bioactive titanium oxide layer on titanium(Ti) with a cell consisting of Ti as the working electrode, Pt as the counter one, Ag/AgCl as the reference one, and an aqueous solution of 0.1 mol/L Ca(NO3)2 as the electrolyte solution. Ti was kept at 9.5V for 1 hour for oxidation(denoted as Ca9.5). Ti was subject to cathodic polarization at −3.0V for 10 min(Ca-3.0).: calcium ions were expected to be adsorbed on its surface. On treatment Ca9.5–3.0 Ti was first oxidated at 9.5V for 1 hour and subsequently kept at −3.0V for 10 min. The specimens of Ca9.5–3.0 and Ca-3.0 were found so bioactive as to deposit apatite within 12 hours and 1 day, respectively, in a simulated body fluid(Kokubo solution) whereas those due to Ca9.5 could not deposit apatite within 7 days. Calcium hydroxide and calcium carbonate detected on the bioactive surface caused no harmful effects on spontaneous deposition of apatite in the fluid.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 599: Symposium DD – Mineralization in Natural & Synthetic Biomaterials , 1999 , 141
Copyright
Copyright © Materials Research Society 2000

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