In Vitro Study of Antibacterial Properties of Dental Restorative Materials towards Streptococcus sobrinus and Lactobacillus salivarius

摘要

Introduction: Dental restorative materials may not be able to provide a perfect seal from microorganism from penetrating the cavity walls, thus lead to formation of secondary caries. Therefore, presence of antibacterial properties in dental restorative materials can give a great significance in preventing formation of secondary caries.Objectives: 1) To evaluate the antibacterial effects of dental restorative materials Silverfil (amalgam), RMGIC (Ketac Nano), Composite (Amaris) and GIC (Inofil Molar AC-VOCO) against Streptococcus sobrinus and Lactobacillus salivarius, 2) To compare the antibacterial properties of each materials against tested bacteria.Materials and method: Agar Diffusion Test (ADT) was used in this study. Dental materials were tested on Brain Heart Infusion Agar. Zone of inhibition exhibited by the materials were measured with digital caliper and data was analyzed by Kruskal Wallis and Man-Whitney Test.Result: Silverfil shows the greatest antibacterial properties on Streptococcus sobrinus 22.41 mm (1.10) and Lactobacillus salivarius 11.99 mm (2.00) with a significant difference (P < 0.05) followed by Ketac Nano and Ionofil Molar. Amaris exhibit an antibacterial activity in Lactobacillus salivarius 8.86 mm (1.37) but none in Streptococcus sobrinus. Streptococcus sobrinus was more sensitive towards Silverfil, Ketac Molar and Ionofil Molar with a significant difference P < 0.05 except for Amaris which is more sentisitive toward Lactobacillus salivarius.Conclusion: All materials exhibit antibacterial properties toward Lactobacillus salivarius and Streptotococcus sobrinus except for Amaris which did not show any antibacterial properties towards Streptococcus sobrinus.