The purpose of the study is to assess the antiadherent and antibacterial properties of surface-modified different orthodontic brackets with silver nanoparticles against Streptococcus mutans and Streptococcus sobrinus, using radiomarker. In this study evaluated quantitatively the adherence of Streptococci to 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 and Streptococci were cultivated by gender. A radioactive marker (3H) 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 (Sheffè post hoc). The results showed significant differences were found among the groups. GIIIn shown the lowest scores for both bacteria; in contrast, GIX for Streptococcus mutans and GVI for Streptococcus sobrinus were the highest values. 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.

中文翻译：

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正畸中的银纳米粒子，细菌抑制的新替代方案：体外研究。


该研究的目的是使用放射性标记物评估表面改性的不同正畸托槽与银纳米粒子对变形链球菌和远缘链球菌的抗粘附和抗菌特性。本研究定量评估了链球菌对正畸托槽的附着力，选取了 300 个正畸托槽样本，分为 10 组：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) 。所有样品均经过超声处理，并按性别培养链球菌。使用放射性标记（3H）对细菌进行编码并对其进行测量。之后，将支架浸入放射性标记溶液中，并测量辐射。统计分析通过 ANOVA 检验（Sheffè post hoc）进行计算。结果显示各组之间存在显着差异。 GIIIn 两种细菌的​​得分最低；相反，变形链球菌的GIX和远缘链球菌的GVI是最高值。用纳米银对正畸托槽进行表面修饰可用于防止正畸治疗过程中牙菌斑的积累和龋齿的发展。