Akademik Veri Yönetim Sistemi
European Journal of Oral Sciences, cilt.133, sa.4, 2025 (SCI-Expanded)
This study evaluated the repair bond strengths of ceramic and hybrid ceramic CAD/CAM restorations following bioactive-glass, silica-coated alumina, and aluminum oxide surface treatments. Shear bond strength (SBS) tests, surface roughness, and scanning electron microscopic (SEM) evaluations were performed on 180 specimens (7×12×2 mm3 and 5×5×3 mm3, respectively) of ceramic (IPS Empress) and hybrid ceramic (Cerasmart270) blocks. Samples were thermocycled (5°C–55°C, 5000 cycles) and silica-coated alumina, Al2O3, or bioactive-glass were used for surface conditioning. Resin composite was applied on substrate using two- (Tokuyama Universal) or one-bottle (G-Premio) universal adhesives, combined with the same brand universal shade composites (Omnichroma, Essentia Universal). SBS values were measured using a universal testing machine; failure types were analyzed using a stereomicroscope. Surface roughness was assessed with a profilometer, followed by SEM. Statistical analysis included ANOVA, Tukey HSD, and Fisher's Exact tests. The highest mean SBS values were observed for ceramics in conjunction with two-bottle universal adhesives. No statistically significant differences were found in the SBS values for different surface conditioning treatments except for hybrid ceramic conditioned with Al2O3. Bioactive-glass and silica-coated alumina caused similar surface roughness as indicated by the SEM images. A surface conditioning method and an adhesive system are both essential for hybrid ceramic repairs, while the adhesive system was more critical for ceramics.