Adhesive Bond Strength between Fiber Posts and Resin Composites: A Pilot Study
The purpose of this study was to evaluate the bond strength between fiber posts and four types of resin composites: Tetric® Ceram, MultiCore® HB, MultiCore® Flow and Filtek™ Z350. Sixteen FRC Postec® posts were cleaned with alcohol and coated with silane coupling agent. The fiber posts were divided into four groups and placed centrally in cylindrical molds which were then filled with one of the resin composites to a diameter of 6 mm. The cylindrical specimens were then sliced to make disc specimens 1 mm. thick. The shear bond strengths were tested using the Universal Testing Machine with cross head speed at 0.5 mm./min. to measure the force (MPa) which pushed the posts out of the resin composites. The means of bond strength were statistically analyzed using One-way ANOVA and LSD. The results showed that the mean bond strength between MultiCore® Flow and fiber posts was the highest and was significantly higher than those of Tetric® Ceram and Filtek™ Z350 (p< 0.05).
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