Journal of Dental Research, Vol 71, 1326-1331, Copyright © 1992 by International & American Associations for Dental Research Online Journals
A new method for promoting adhesion between precious metal alloys and dental adhesives
H. Ohno, Y. Araki and K. Endo
Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 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 silver-based alloys
(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.
