Objective: The purpose of this study was to evaluate the surface conditioning methods on the adhesion of one step self-adhesive resin cement to Yttria-Tetragonal Zirconia Polycrystal (Y-TZP) ceramics.
Materials & Methods: Disk-shaped (diameter 26mm, thickness 2mm) Y-TZP ceramics (Cercon, Degudent) were used and finished with wet 600-grit silicon carbide abrasive paper. The specimens were divided randomly into 5 groups (n=10), according to the surface treatments (group I- no treatment; group II- sandblast only with 50um Al2O3; group III- tribochemical silica coating(Cojet, 3M ESPE) with 30um Al2O3 + SiOx; group IV- zirconia primer with Z-prime; group V- sandblast with 50um Al2O3 + zirconia primer with Z-prime) rendered. Adhesive cement, Clearfil SA Luting (Kuraray) was bonded to the ceramic surfaces using gel caps (diameter 4.5mm, 9mm). All specimens were thermocycled (5 and 55 °C, 5000 cycles) and subjected to shear bond strength test (0.5mm/min). All data were statistically analyzed using one-way ANOVA and Tukey test(a=0.05).
Results: No significant differences were found among the all groups (2.77 ± 0.84, 3.2 ± 5.78, 2.70 ± 0.42, 2.70 ± 0.42, 2.38 ± 0.79, 2.76 ± 0.66 MPa).
Conclusion: Zirconia primer, sandblast and tribochemical silica coating are not effective between Y-TZP ceramica and self-adhesive resin cement. Combined application with zirconia primer and sandblast also is not improving the bond strength.