Abstract
The effect of the four types of surface treatment methods was evaluated to improve the bond strength between the self-curing acrylic resin and the abrasion-resistant plasticdenture teeth. All of the surface treatment methods significantly increased the bond strength. Specimens without surface treatment showed surface fractures after the bond test. As for the surface treatments using the silane coupling agent and 5% hydrofluoric acid-UDMA, most specimens showed surface fractures. The mechanically-roughened specimens (polished with # 100-SiC paper, sandblasted) showed cohesive fractures in self-curing acrylic resin. Although the bond strengths of specimens with or without surface treatment were significantly reduced after the thermocycle test (5, 000 cycles), most specimens that underwent the mechanical-roughening treatment showed cohesive fractures. The results of this study suggested that surface treatments of mechanicalroughening were effective methods to improve the bond strength and the bond durability of self-curing acrylic resin to occlusal surfaces of cross-linked abrasion-resistant plastic denture teeth.
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