Journal of Dental Research, Vol 67, 1376-1380, Copyright © 1988 by International & American Associations for Dental Research Online Journals

ARTICLES

A new ion-coating surface treatment of alloys for dental adhesive resins

T. Tanaka, M. Hirano, M. Kawahara, H. Matsumura and M. Atsuta
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.

4-META and new phosphate-methacrylate resins adhere strongly to dental alloys. However, for strengthening the water durability of the adhesive interface, the oxidation of the alloy surface is indispensable. A new oxidation method using ion-sputtering was developed, and the effectiveness of this surface treatment on two dental alloys--a type IV gold alloy and Ni-Cr-Be alloy--was investigated. As an endurance test, thermocycling for a maximum of 100,000 cycles was adopted, and the tensile adhesive bond strength was then measured. Ion-coating the surface of the alloys resulted in strong bonds with adhesive resins, and after 100,000 thermocycles, a bond strength of above 20 MPa was maintained.

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