Abstract
The purpose of this study was to determine the effect of different storage solutions and mounting media on the in-vitro bond strength of a dentinal adhesive/composite to dentin. Thirty-six non-carious, unrestored human molars were randomly divided into 2 groups of 18: Group A were mounted in polymethyl methacrylate and Group C were mounted with improved dental stone in copper rings. The teeth were prepared to generate 4 planar surfaces which were oriented 90° to the mounting base to produce a total of 144 dentin bonding surfaces. Groups A and C were each subdivided into 3 groups of 6 teeth per group to be placed in 3 storage solutions: 0.9% aqueous NaCl (As, Cs); 0.05% saturated solution of thymol in distilled water (At, Ct); and distilled water (Aw, Cw). After 3 months in their respective storage solutions composite buttons 2.3 mm in diameter were attached using a dentinal adhesive. The bond strengths were tested in shear utilizing a cross-head speed of 0.5 cm/min and a 50 kg load cell. The results showed no significant differences at the 0.05 confidence level in mean bond strengths as related to the mounting media or the storage solutions tested.
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