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Journal of Dental Research
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A New Method for Promoting Adhesion between Precious Metal Alloys and Dental Adhesives

H. Ohno

Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 061-02 Ishikari-Tobetsu, Hokkaido, Japan

Y. Araki

Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 061-02 Ishikari-Tobetsu, Hokkaido, Japan

K. Endo

Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 061-02 Ishikari-Tobetsu, Hokkaido, Japan

A new, simple method of modifying the adherend metal surface by a liquid Ga-Sn alloy (Adlloy) was applied to dental precious and base-metal alloys for adhesion with 4-META adhesive resin. Adhesions of 4-META resin to three other surface states-as-polished, oxidized at high temperature, and electroplated tin-were also performed for comparison with the adhesion on Adlloy-modified surfaces. Bond strength measurements were made, and the durability against water at the adhering interface was evaluated.

The Adlloy-modified gold alloys (Type IV and 14 K) and silverbasedalloys (Ag-Pd and Ag-Cu) showed not only high bond strengths but also excellent water durability at the adhesion interface. Surface modification by Adlloy, however, did not affect adhesion to Ag-In-Zn and base-metal (SUS, Co-Cr, and Ni-Cr) alloys. Adhesion to the tin-electroplated specimens was comparable with that to the Adlloy-modified specimens.

Journal of Dental Research, Vol. 71, No. 6, 1326-1331 (1992)
DOI: 10.1177/00220345920710061001
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H. Ohno, Y. Araki, and K. Endo
ESCA Study on Dental Alloy Surfaces Modified by Ga-Sn Alloy
Journal of Dental Research, June 1, 1992; 71(6): 1332 - 1339.
[Abstract] [PDF]