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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
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Authors Affiliations
  1. 1. Department of Operative Dentistry, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
  2. 2. Department of Prosthetic Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Tehran University of Medical Sciences, Tehran, Iran

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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