Streptococcus mutans is the microorganism mostly responsible for initiation of tooth decay and also for the progression of an\r\nestablished lesion. Silver has been used for its antibacterial properties for many years, in different forms: ionised and elementary\r\nforms, as silver zeolites or as nanoparticles. The purpose of this study was to evaluate the antibacterial activity of three dental\r\ncements modified by nanosilver. Three cements were used: Sealapex, RelyX ARC, and Vitrebond. The cements were incorporated\r\nwith 0.05mL of silver nanoparticles solution. Control groups were prepared without silver. Six Petri plates with BHI were\r\ninoculated with S. mutans using sterile swabs. Three cavities were made in each agar plate (total = 18) and filled with the\r\nmanipulated cements. They were incubated at 37?C for 48 h, and the inhibition halos were measured. The paired t-Test was used\r\nfor statistical analysis (P < 0.05). No inhibition halos were obtained for Sealapex and Rely X, but Vitrebond showed bactericidal\r\nactivity without silver and enhanced effect with silver incorporation.
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