Purpose: This study was conducted to evaluate the roughness changes of zirconia surface after applying three different concentrations of ZrO2 slurry (ZirADD, PNUADD, Busan, Korea) to the pre-sintered zirconia surface and shear bond strength between zirconia and self-adhesive resin cement.Materials and Methods: Experimental groups were classified into control and three test groups according to the surface treatment with different slurry concentration (15% (ZA15), 30% (ZA30), and 50% (ZA50) group). After sintering all the specimen, roughness change was measured, and bond strength of the self-adhesive resin cement was examined.Results: Surface roughness values(Ra) significantly increased after applying ZrO2 slurry. ZA50 group showed the highest surface roughness value compared to others (p < .05). But the shear bond strength value (MPa) showed that ZA30 group was the highest value among the groups (p < .05).Conclusion: Within the limitations of this study, ZrO2 slurry application on pre-sintered zirconia surface can be an effective method to obtain strong bond between zirconia and self-adhesive resin cement by increasing zirconia surface roughness after zirconia sintering process.
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Jo et al. (2020) studied this question.
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