Abstract
The relationship between the bond strength and rigidity of adherends was examined using commercial dental resin adhesives. The adherends were seven alloys with Vickers hardness of 10〜220, and human and bovine teeth. The alloys were plated with Tin to make the bonding activity uniform. In case of alloy, there exists an obvious relation between hardness (x) of adherends and bond strength (y). The regression equations were y=1.01x+140 for resin cement of 4-META-TBB-O system, and y=1.04x+111 for that containing phosphate ester as a promotive monomer. In regard to teeth, although the strongest correlation was observed between the distance (μm) from enamel surface and bond strength, there was no correlation between bond strength and hardness. In addition, increasing gradient of bond strenght for hardness of enamel is rela tively small compared to that of the alloys. As the bovine teeth were similar to human teeth in bond strength, bovine teeth were considered to be suitable substitutes of human teeth in these adhesion testing.
