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Physico-Mechanical Properties, Antimicrobial Activities, and Anti-Biofilm Potencies of Orthodontic Adhesive Containing Cerium Oxide Nanoparticles Against Streptococcus Mutans; [Физико-Механические Свойства, Антимикробная Активность И Антибиоплёночная Активность Ортодонтического Клея, Содержащего Наночастицы Оксида Церия, В Отношении Streptococcus Mutans] Publisher Pubmed



Pourhajibagher M1 ; Bahador A2
Authors
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Authors Affiliations
  1. 1. Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Fellowship in Clinical Laboratory Sciences, BioHealth Lab, Tehran, Iran

Source: Folia Medica Published:2022


Abstract

Introduction: White spot lesions around orthodontic brackets may lead to the formation of dental caries during and following fixed orthodontic treatment. Aim: This study aimed to evaluate the physico-mechanical properties and antimicrobial potencies of orthodontic adhesive doped with cerium oxide nanoparticles (CeO2-NPs) against Streptococcus mutans. Materials and methods: After synthesis and conformation of CeO2-NPs by transmission electron microscope (TEM), shear bond strength (SBS) and adhesive remnant index (ARI) of modified orthodontic adhesive containing different concentrations of CeO2-NPs (0, 1, 2, 5, and 10 wt%) were measured. The antimicrobial effects of modified orthodontic adhesive were evaluated by disk agar diffusion method and biofilm formation inhibition assay. Results: The pseudo-spherical shapes of CeO2-NPs were observed in TEM micrographs. The physico-mechanical finding showed that 5 wt% CeO2-NPs showed the highest concentration of CeO2-NPs and SBS value (18.21±9.06 MPa, p<0.05) simultaneously with no significant differences in ARI compared with the control group (p>0.05). There was a significant reduction in cell viability of S. mutans with increasing CeO2-NPs concentration. The 3.1 Log10 and 4.6 Log10 reductions were observed in the count of treated S. mutans with 5 and 10 wt% CeO2-NPs, respectively (p<0.05). Conclusions: Overall, an orthodontic adhesive containing 5 wt% CeO2-NPs had antimicrobial properties against S. mutans without adverse effects on SBS and ARI. Copyright © by authors
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