Shear Bond Strength of Glass Ionomer Cement to Silver Diamine Fluoride Treated Caries

Purpose: The purpose of this study is to measure microshear bond strength (µSBS) of glass ionomer cement (GIC) to carious dentin with and without silver diamine fluoride (SDF) treatment. Methods: Permanent molars were sectioned and demineralized to create artificial carious lesions. Variables tested included the demineralization of the dentin, application of SDF, use of conditioner, and time between SDF and restoration. µSBS was measured after 24 hours using an UltraTester machine. Results: The strongest bond strength was found when GIC was placed on conditioned and demineralized dentin treated with SDF one week prior. There was no statistical difference to µSBS with and without SDF. Statistically significant increases in bond strength were found when the dentin was demineralized, when conditioner was applied before SDF, and when one week elapsed between SDF application and GIC placement. The lowest bond strength was found with immediate GIC application after SDF.Conclusions: Results suggest that optimal retention is obtained by conditioning with polyacrylic acid and allowing SDF treatment to set for one week prior to GIC placement