Corrosion behavior of Ti-Ag alloys used in dentistry in lactic acid solution |
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| Authors: | Masatoshi Takahashi Masafumi Kikuchi and Yukyo Takada |
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| Affiliation: | (1) Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku Sendai, 980-8575, Japan;(2) Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku Sendai, 980-8575, Japan;(3) Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku Sendai, 980-8575, Japan |
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| Abstract: | The purpose of this study was to evaluate the corrosion resistance of experimental Ti-Ag alloys used as dental materials.
An elution test and a rest-potential measurement of alloys with 5–30 mass.% Ag were performed in a 1 % lactic acid solution.
The amount of Ti ions released from the α phase of the Ti-Ag alloys decreased as the Ag concentration increased. TiAg present
in the alloys dissolved preferentially, but Ti2Ag did not. The rest potentials of the Ti-Ag alloys were significantly higher than that of pure titanium. The elution test
and the rest-potential measurement revealed that the Ti-Ag alloys, which formed a single α-titanium structure or contained
a titanium and Ti2Ag, had excellent corrosion resistance that was comparable or superior to that of pure titanium. |
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