The purpose of this study was to evaluate the effect of dental metal primer and multipurpose primer on the shear bond strength of 4META-MMA-TBBO resin to pure titanium and gold-silver-palladium alloy. Adherends were fabricated with gold-silver-palladium alloy (MC) or pure titanium (Ti). One multipurpose primer, G-multi primer (GM), and one dental metal primer, Metal primer Z (MZ), were used. A 4META-MMA-TBBO resin, Super-Bond C&B, was used. On MC and Ti specimens, a total of 24 specimens for four groups (n = 6), divided by primer and thermocycling, were prepared.

Then, the shear bond strength was determined both before and after thermocycling (50,000 cycles). The results showed no significant difference between GM and MZ on MC and Ti.

The aim of this study was to clarify the effect of ultraviolet light irradiation time on the shear bond strength of self-adhesive resin cement to prosthetic materials. As factor A, three conditions of the adherends were set with gold alloy (Au), prototype composite resin block (CB) and CeTZP/Al₂O₃ (Zr). As factor B, four conditions of time of UV irradiation were set: 0, 60, 120 and 180 minutes. After UV irradiation of the adherend surface for each time, self-adhesive resin cement was used for cementation, and a compression shear test was performed. Two-way ANOVA of shear bond strength showed that the main effects A and B and the interaction effect A×B were significant (p<0.05). In Au, the shear bond strength improved as the UV irradiation time increased. Although there was a slight improvement in the shear bond strength of CB, no significant difference was observed. In Zr, the shear bond strength improved up to 120 minutes of irradiation the same as in Au, but decreased slightly with 180 minutes of irradiation. The maximum values of shear bond strength were 20.3 MPa for Au, 7.2 MPa for CB, and 27.2 MPa for Zr. These results showed that the shear bond strength varied depending on the combination of the adherend material and irradiation time. Regarding clinical significance, it is suggested that UV irradiation can be a useful surface pre-treatment because of the increase in shear bond strength after UV irradiation.