Abstract
This study evaluated the interaction between adhesives and resin composites and determined significant parameters influencing marginal adaptation in dentin cavities. The three one-step adhesives FluoroBond Shake One, iBond, and an experimental self-etching adhesive were combined with three resin composites. Shear bond strength on human dentin was determined 15 min after light activation. Marginal adaptation of the nine adhesive–composite combinations was evaluated in butt-joint dentin cavities. Polymerization contraction was measured using the bonded disk method by Watts & Cash. Polymerization shrinkage stress was evaluated by photoelasticity using the first order isochromatic line in cylindrical Araldit cavities for calculation of stress. In conclusion, there is no relationship between marginal cavity adaptation and bond strength, yet a distinct correlation with polymerization contraction and contraction stress exists.
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