過酸化水素を含む溶液中におけるチタン合金の変色に及ぼすpHの影響

小田 豊; 武本 真治; 服部 雅之; 吉成 正雄; 河田 英司

doi:10.14832/gsjsdmd.2007f.0.30.0

50th General Session of the Japanese Society for Dental Materials and Devices in conjunction with International Dental Materials Congress 2007

Session ID : O-016

DOI https://doi.org/10.14832/gsjsdmd.2007f.0.30.0

Conference information

Host: The Japanese Society for Dental Materials and Devices

Oral Presentation

Influence of pH on Discoloration of Titanium-based Alloys in Solutions Containing Hydrogen Peroxide

*Yutaka Oda, Shinji Takemoto, Masayuki Hattori, Masao Yoshinari, Eiji Kawada

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Keywords: titanium alloys, hydrogen peroxide, discoloration

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

This study compared differences in discoloration caused by hydrogen peroxide-containing solutions at various pHs in several titanium-based alloys. At pH4, all titanium-based alloys showed remarkable discoloration, and the ΔE*ab value was more than 18. ΔE*ab values at pH 5 and 6 for TI and all the titanium-based alloys except TNI were lower than those at pH 4. Discoloration of titanium-based alloys in acidic hydrogen peroxide-containing solutions may be caused by peroxide-induced oxidation.

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