TY - JOUR
T1 - Difference in surface reactions between titanium and zirconium in Hanks' solution to elucidate mechanism of calcium phosphate formation on titanium using XPS and cathodic polarization
AU - Tsutsumi, Y.
AU - Nishimura, D.
AU - Doi, H.
AU - Nomura, N.
AU - Hanawa, T.
N1 - Funding Information:
This study was supported by a grant-in-aid for Scientific Research ((B) 18300160), Japan Society for the Promotion of Science. This study was performed under the inter-university cooperative research program of Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University. We are also grateful to Drs. H. Kimura and N. Ohtsu, Institute for Materials Research, Tohoku University, for assisting with XPS.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Titanium and zirconium were immersed in Hanks' solution with and without calcium and phosphate ions, and the surfaces were characterized with X-ray photoelectron spectroscopy (XPS) to determine the mechanism of calcium phosphate formation on titanium in simulated body fluids and in a living body. In addition, they were cathodically polarized in the above solutions. XPS characterization and cathodic polarization revealed differences in the surface properties in the ability of calcium phosphate formation between titanium and zirconium. The surface oxide film on titanium is not completely oxidized and is relatively reactive; that on zirconium is more passive and protective than that on titanium. Neither calcium nor phosphate stably exists alone on titanium, and calcium phosphate is naturally formed on it; calcium phosphate formed on titanium is stable and protective. On the other hand, calcium is never incorporated on zirconium, while zirconium phosphate, which is easily formed on zirconium, is highly stable and protective. Our study presents new information regarding the surface property of titanium and demonstrates that the characteristics of titanium and zirconium may be applied to various medical devices and new surface modification techniques.
AB - Titanium and zirconium were immersed in Hanks' solution with and without calcium and phosphate ions, and the surfaces were characterized with X-ray photoelectron spectroscopy (XPS) to determine the mechanism of calcium phosphate formation on titanium in simulated body fluids and in a living body. In addition, they were cathodically polarized in the above solutions. XPS characterization and cathodic polarization revealed differences in the surface properties in the ability of calcium phosphate formation between titanium and zirconium. The surface oxide film on titanium is not completely oxidized and is relatively reactive; that on zirconium is more passive and protective than that on titanium. Neither calcium nor phosphate stably exists alone on titanium, and calcium phosphate is naturally formed on it; calcium phosphate formed on titanium is stable and protective. On the other hand, calcium is never incorporated on zirconium, while zirconium phosphate, which is easily formed on zirconium, is highly stable and protective. Our study presents new information regarding the surface property of titanium and demonstrates that the characteristics of titanium and zirconium may be applied to various medical devices and new surface modification techniques.
KW - Calcium phosphate
KW - Cathodic polarization
KW - Titanium
KW - X-ray photoelectron spectroscopy
KW - Zirconium
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U2 - 10.1016/j.msec.2009.01.016
DO - 10.1016/j.msec.2009.01.016
M3 - Article
AN - SCOPUS:67349105665
VL - 29
SP - 1702
EP - 1708
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
SN - 0928-4931
IS - 5
ER -