Comparative evaluation of micro-tensile bond strength between zirconia core and all-ceramic layering with different surface treatments: an in vitrostudy

Background: The quest for newer and stronger materials replacing teeth has resulted in Zirconium oxide's introduction, which possesses excellent mechanical strength toughness. However, uncertainty exists the relationship between its bond surface treatment method adopted mode of failure at interface. Aim - study aimed to evaluate comparison micro-tensile zirconia core all-ceramic layering with different treatments analyse their by Scanning Electron Microscope (SEM). Materials methods: Zirconia cores (Ceramill ZI 71 XS) were fabricated CAD-CAM into discs 5mm diameter 3.5mm height. Then divided four groups. Among which, Group-I was control group, remaining are treated. Group-II specimens treated sandblasting, followed acid etching; Group-III Group-IV zirliner glass beads, respectively. After that, veneering material (IPS Empress, E.max Ceram Dentin) 2×2 mm adhered then kept ceramic furnace. mounted on a Universal Testing Machine, tensile stress is applied. obtained data subjected One-way ANOVA Tukey-HSD tests statistical analyses. Results samples sandblasting etching showed more veneer interface. Furthermore, SEM revealed cohesive Group-II, whereas, -III, there an adhesive failure. exhibited mixed significant differences (p=0.001) within In posthoc analysis, Groups -I, II, IV. Conclusion: Increased roughness aluminium oxide particles, when coupled along chemical hydrofluoric acid, enhanced Y-TZP ceramic.