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  • Title: Effect of water storage on bond strength of self-etching adhesives to dentin.
    Author: Garcia RN, de Goes MF, Giannini M.
    Journal: J Contemp Dent Pract; 2007 Nov 01; 8(7):46-53. PubMed ID: 17994154.
    Abstract:
    AIM: The objective of this study was to evaluate the bond strength of self-etching adhesive systems one week and one year after storage in water. METHODS AND MATERIALS: Fragments from the buccal surfaces of 45 bovine teeth were prepared (12 mm in length x 5 mm in width x 1.0 mm in thickness). Dentin surfaces were wet-abraded with 600-grit SiC paper to create a standardized smear layer. Samples were randomly assigned to 18 experimental groups (n=5), according to nine adhesive systems tested (Single Bond; Adper Prompt L-Pop; iBond; One-Up Bond F; Xeno III; Clearfil SE Bond; Optibond Solo Plus SE; Tyrian SPE/One-Step Plus; and UniFil Bond) and two water-storage times (one week and one year). Adhesives were applied according to the manufacturers' instructions. Z250 composite was applied into the molds to fill up the internal diameter volume of a Tygon tubing mold (1.0 mm high/0.7 mm internal diameter). Micro-shear bond strengths were determined using an apparatus attached to an Instron Universal Testing Machine (0.5 mm/min). Data were statistically analyzed using a two-way analysis of variance (ANOVA) and the Tukey's test (5%). RESULTS: One year after water storage the dentin bond strength of all adhesive systems reduced significantly, except for One-Up Bond F. CONCLUSION: Water-storage time decreased the bond strength for most dentin bonding agents tested.
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