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Effect of Storage Time on Microtensile Bond Strength Between Quartz Fiber Post and Composite Core After Different Post Surface Treatments Publisher



Khamverdi Z1 ; Abbasi S2 ; Habibi E3 ; Kasraei S1 ; Azarsina M1 ; Ebadi S1
Authors

Source: Journal of Conservative Dentistry Published:2011


Abstract

Aim: The aim was to evaluate the influence of water storage on fiber post-resin composite adhesion after different postsurface treatments. Materials and Methods: Forty-two fiber posts were used. Half of them were treated by hydrogen-peroxide and the other half were sandblasted. The adhesive (Single Bond, 3M, USA) was applied on the post. Core was built-up using flowable composite (AElite Flow, Bisco, USA). The specimens were divided into eight groups. Group 1 was treated with H2O2. Groups 2-4 were treated with H2O2 but stored for 3, 6, and 9 months, respectively. Groups 5-8 were sandblasted and stored for 0, 3, 6, and 9 months. μTBS was measured and data analyzed using one-way ANOVA and Tukey HSD. The fractured surfaces were evaluated by a stereomicroscope. The morphology of interfaces was assessed under SEM. H2O2-treated groups showed higher bond-strength. Results: The effect of surface-treatment method and storage-time was significant (P<0.0001), but there was no significant difference for their interaction effect (P=0.05). Water aging significantly decreased μTBS. Conclusions: Water aging significantly decreased microtensile bond strength regardless of the type of post surface treatment.
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