Effect of different bonding agents on the shear bond strength between monolithic zirconia and indirect composite.

Abstract

This study aims to investigate the effect of different bonding agents and the application of glaze on the shear bond strength (SBS) between monolithic zirconia (MZ) and indirect composite (IC). For this study, five different bonding agents (G-prime bond, GP; Tokuyama Universal bond, TU; Signum Zirconia bond, SZ; Clearfil Ceramic Primer, CCP; Zprime bond, ZP) were applied on 200 MZ disk-shaped specimens. For each group, the sample size was 10 (n = 10). The experimental setup was prepared as two pieces according to the ISO TR 11405 standards. The specimens embedded in the acrylic resin were placed into the experimental setup and a universal testing machine at a crosshead speed of 0.5 mm/min. Mann-Whitney U test and Kruskal-Wallis test were used for statistical analyses of the groups. Thereafter, Bonferroni correction was performed, and test results with P < 0.05 were accepted as statistically significant. The application of glaze significantly enhanced SBS when ZP or CCP were used; however, it did not have any significant effect when GP, TU, or SZ were used. Thermocycling significantly decreased the SBS in all bonding-agent groups except GP specimens with glaze (P = 0.16). The highest SBS in all conditions was noted when GP and TU were used. These findings suggest that the bonding agents GP and TU may be recommended for better bonding between MZ and IC. Int J Prosthodont 2023. doi: 10.11607/ijp.8340.