EFFECT OF DIFFERENT SURFACE TREATMENTS ON MICROSHEAR BOND STRENGTH OF AGED RESIN NANOCERAMIC REPAIRED WITH RESIN COMPOSITE

Abstract

The objective of this research was to evaluate the effect of surface treatments on aged resin nanoceramic repaired with resin composite. resin nanoceramic (Cerasmart®) specimens were prepared and subjected to 30,000 cycles of thermocycling for aging. The specimens were rough with diamond bur and randomly dividied in to 5 groups (n=20): (RSB) RelyXTM ceramic primer with AdperTM single bond 2, (SU) ScotchbondTM universal,(RSU) RelyXTM ceramic primer with ScotchbondTM universal adhesive, (UP) ScotchbondTM universal plus adhesive and (RUP) RelyXTM ceramic primer with ScotchbondTM Universal Plus adhesive. All the specimens were restored with resin composite (FiltekTM Z350XT) and subjected to microshear bond strength test with universal test machine. From one–way ANOVA and Bonferroni statistical analysis, it was found that (RUP) had significantly higher mean of microshear bond strength value than (SU)(RSU)(UP) (P ≤ 0.05) but not different from (RSB) (p > 0.05). (RSB) and (RSU) had no signicant differences in microshear bond strength value (P > 0.0.5) but significantly higher than (SU) and (UP) (P ≤ 0.05)