Silver nanoparticles in orthodontics, a new alternative in bacterial inhibition: in vitro study

Background The purpose of the study is to assess the antiadherent and antibacterial properties of surface-modified different orthodontic brackets with silver nanoparticles againstStreptococcus mutansandStreptococcus sobrinus, using radiomarker. Methods In this study evaluated quantitatively the adherence ofStreptococcito orthodontic brackets, 300 samples of orthodontic brackets were selected and classified in to 10 groups as follow: GIn (InVu-Roth), GIIn (System-AlexanderLTS), GIIIn (Gemini-Roth), GIVn (NuEdge-Roth), GVn (Radiance plus-Roth), GVI (InVu-Roth), GVII (System-AlexanderLTS), GVIII (Gemini-Roth), GIX (NuEdge-Roth), GX (Radiance plus-Roth). All the samples were sonicated andStreptococciwere cultivated by gender. A radioactive marker (H-3) was used to codify the bacteria and measure them. After that, the brackets were submerged in a radiolabelled solution, and the radiation was measured. The statistical analysis was calculated with ANOVA test (Sheffe post hoc). Results The results showed significant differences were found among the groups. GIIIn shown the lowest scores for both bacteria; in contrast, GIX forStreptococcus mutansand GVI forStreptococcus sobrinuswere the highest values. Conclusions Surface modification of orthodontic brackets with silver nanoparticles can be used to prevent the accumulation of dental plaque and the development of dental caries during orthodontic treatment.