IADR Abstract Archives
Shear Bond Strength of an Experimental Universal Adhesive to Dentin
Objectives: The objective of this study was to determine the dentin shear bond strength of an experimental universal adhesive as a function of zirconia treatment and artificial aging.
Methods: Human molars (n=40) were sectioned, mounted, and ground to a flat dentin surface using 320/400/600 grit SiC polishing papers. The specimens were randomly distributed into four experimental groups.
Zirconia rods (2.5 mm diameter) were treated with Monobond® Plus or the Experimental Universal Adhesive (EXP). The zirconia rods were cemented to the dentin surface using resin cement [Variolink® Esthetic DC/Ivoclar Vivadent, Inc. (VEDC)] and an experimental universal adhesive. The specimens were allowed to self-cure under a constant load of 485 grams to secure the zirconia rods. All groups were stored in a 37°C incubator at 100% humidity for 24 hours. Groups 2 and 4 were subjected to 10,000 thermocycles from 5°C to 55°C. Specimens were loaded in the Instron Universal Testing Machine using a 1KN load cell with a crosshead speed of 1.0 mm/min.
Results: Mean shear bond strength (MPa)/(Mean ± SD) values were analyzed by one-way univariate analysis of variance (ANOVA), p < 0.05 and multiple comparisons (Tukey HSD) were performed (Table 1).
Conclusions: Within the limitations of this study, there was not a statistically significant difference in shear bond strength after treatment with the two primers or after artificial aging.
Methods: Human molars (n=40) were sectioned, mounted, and ground to a flat dentin surface using 320/400/600 grit SiC polishing papers. The specimens were randomly distributed into four experimental groups.
Zirconia rods (2.5 mm diameter) were treated with Monobond® Plus or the Experimental Universal Adhesive (EXP). The zirconia rods were cemented to the dentin surface using resin cement [Variolink® Esthetic DC/Ivoclar Vivadent, Inc. (VEDC)] and an experimental universal adhesive. The specimens were allowed to self-cure under a constant load of 485 grams to secure the zirconia rods. All groups were stored in a 37°C incubator at 100% humidity for 24 hours. Groups 2 and 4 were subjected to 10,000 thermocycles from 5°C to 55°C. Specimens were loaded in the Instron Universal Testing Machine using a 1KN load cell with a crosshead speed of 1.0 mm/min.
Results: Mean shear bond strength (MPa)/(Mean ± SD) values were analyzed by one-way univariate analysis of variance (ANOVA), p < 0.05 and multiple comparisons (Tukey HSD) were performed (Table 1).
Conclusions: Within the limitations of this study, there was not a statistically significant difference in shear bond strength after treatment with the two primers or after artificial aging.