Antibacterial properties of dentin bonding systems, polyacid-modified composite resins and composite resins

This study examined the antibacterial activities of the bonding systems Syn tac, EBS and Scotchbond 1, the polyacid-modified composite resins Hytac and Compoglass, and the composite resins Tetric, Z100 and Scalp-it. They were evaluated using the cariogenic bacteria Streptococcus mutans, Lactobacillus salivarius, Streptococcus sorbinus and Actinomyces viscosus in vitro with a modified cylinder drop plate agar diffusion assay. All adhesives of the d entin bonding systems and the polyacid-modified composite resins exhibited various degrees of antibacterial activity against all of the test bacteria. On the contrary, composite resins did not affect bacterial growth. The dat a suggest that the use of these adhesives and polyacid-modified composite r esins may reduce the consequences of microleakage owing to their antibacter ial properties.