Nanopartículas de prata em cimentos resinosos: propriedades antibacteriana e físico-químicas
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2013-12-20
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Universidade Federal de Goiás
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This study aims to evaluate the antibacterial effect of resin luting cements with and without NAg addition, and their influence on color, sorption and solubility. NAg were incorporated to two dual-cured resin luting cements (RelyX ARC - color A1 - and RelyX U200 - color A2 -) in two concentrations (0.05% and 0.07%) and the disc specimens obtained were tested for bacteria inhibition growth against Streptococcus mutans through optical density readings and scanning electron microscopy (SEM) analysis, for color changes with a spectrophotometer and for sorption and solubility after storage in water or 75% ethanol for 28 days, according to the ISO 4049:2010 specifications. Data were subjected to statistycal analysis with ANOVA and Tukey (p=0.05). The optical density of the culture broth indicated bacterial growth, but on SEM the only species identified was Bacillus subtilis. NAg produced significant color change on the resin cements, especially in the lighter color (RelyX ARC). Solubility values were very low for all groups, while sorption values were raised with NAg addition. The resin luting cements with NAg addition did not show antibacterial activity against S. mutans. They also showed perceptible color change and higher sorption than the materials without Nag.
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MAGALHÃES, A. P. R. Nanopartículas de prata em cimentos resinosos: propriedades antibacteriana e físico-químicas. 2013. 88 f. Dissertação (Mestrado em Odontologia) - Universidade Federal de Goiás, Goiânia, 2013.