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
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
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DOI：
10.1016/j.msec.2009.01.016
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Y. Tsutsumi;D. Nishimura;H. Doi;N. Nomura;T. Hanawa
中科院分区：
文献类型：
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作者：
Y. Tsutsumi;D. Nishimura;H. Doi;N. Nomura;T. Hanawa
将钛和锆浸泡在含钙磷离子和不含钙磷离子的Hanks‘s溶液中，并用X射线光电子能谱(XPS)对其表面进行表征，以确定在模拟体液和活体中钛表面形成磷酸钙的机理。此外，它们在上述溶液中被阴极极化。XPS表征和阴极极化分析表明，钛和锆的表面性质不同，形成磷酸钙的能力也不同。钛表面的氧化膜没有被完全氧化，具有较强的反应性；钛表面的氧化膜比钛表面的氧化膜更具被动性和保护性。钙和磷都不能单独在钛表面稳定存在，在钛表面自然形成磷酸钙；在钛表面形成的磷酸钙具有稳定性和保护性。另一方面，钙从来不会被掺入到锆上，而很容易在锆上形成的磷酸锆具有高度的稳定性和保护性。我们的研究提供了有关钛表面性质的新信息，并表明钛和锆的特性可以应用于各种医疗器械和新的表面改性技术。
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.