Evaluation of three different decontamination techniques on biofilm formation, and on physical and chemical properties of resin composites
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Objectives:
This study evaluated three different sterilization/disinfection techniques for resin composites on bacterial growth and surface modification after decontamination.
Methods:
Two resin composites were sterilized/disinfected with three different techniques: UV light, 1% chloramine T, and 70% ethanol. Four different times were used for each technique to determine the shortest time that the solution or UV light was effective. The influence of sterilization/disinfection technique on bacterial growth was evaluated by analyzing the metabolic activity, using the AlamarBlue™ assay, bacterial viability, and SEM images from biofilms of Streptococcus mutans. The surface change, after the process, was analyzed with ATR/FTIR and SEM images. The solutions used for decontamination (1% chloramine-T and 70% ethanol) were analyzed with 1H-NMR to identify any resin compounds leached during the process.
Results:
One minute of decontamination was efficient for all three methods tested. Chloramine-T increased the surface porosity on resin composites, no changes were observed for UV light and 70% ethanol, however, 1H-NMR identified leached monomers only when 70% ethanol was used. No chemical change of the materials was found under ATR/FTIR analyses after the decontamination process. Chloramine-T, with no previous wash, increased the bacterial viability for both resin composites and increased the bacterial metabolism for the resin composite without fluoride.
Conclusion:
UV light had no interference on the resin composites properties tested using 1 min of exposure compared to the other decontamination methods
Abstract
Assunto
Composite resins, Sterilization, Biofilms, Disinfection
Palavras-chave
Resin composite, Sterilization, Biofilm, Surface analysis
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Endereço externo
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6381933/