Abstract
The chemical composition of the surface film formed on dental alloys by surface treatments was determined using x-ray photoelectron spectroscopy(XPS), to understand the interfacephenomena between the alloys and 4-META/MMA-TBBO resin.Three Ni-Cr alloys(one basic and two commercial alloys)were anodically oxidized in 70% H3PO4 or a commercial electrolyte for surface treatment, and then the film formed on the alloy was analyzed.XPS findings revealed that appreciable amounts of PO43- were contained in the film.Also, the concentration of chromium in the surface film formed on the alloys with the treatment was larger than in that formed without the treatment.Furthermore, silicon, which was added in a small amount to the commercial alloys, was an important element for the formation of the film.
