The effect of zirconia powder applications on the shear bond strength between zirconia and Feldspar ceramic

The aim of this study was to evaluate the effect of the zirconia slurry application on the bond strength between veneering porcelain and zirconia core by means of a shear bond test. Fifteen bilayered beam-shape specimens were prepared and divided into 3 groups according to zirconia slurry application. A shear bond strength test was used on each specimen. One-way ANOVA and the Tukey honestly significant difference test were performed to analyze the experimental data. The bond strength with a zirconia slurry had higher mean values than the bond strength without a zirconia slurry. Both of the interfaces showed mixed failure mode with thin layers of a veneer or a zirconia slurry that remained on the zirconia surfaces. Zirconia slurry application before veneering increased the bond strength between zirconia and veneer.