Caracterização microestrutural e avaliação da atividade antimicrobiana de nanopartículas de prata incorporadas em um cimento peruano de silicato de cálcio

Autores

DOI:

https://doi.org/10.33448/rsd-v15i3.50613

Palavras-chave:

Silicatos de cálcio, Nanopartículas de prata, Agentes antimicrobianos, Enterococcus faecalis, Candida albicans.

Resumo

Objetivo: Avaliar a composição das fases cristalinas e a atividade antimicrobiana de um cimento Portland branco modificado com nanopartículas de prata (WPC + NPs-Ag), em comparação com o Agregado de Trióxido Mineral Branco (WMTA) e o Biodentine®. Métodos: Foi realizado um estudo experimental in vitro. A caracterização das fases cristalinas foi realizada por difração de raios X (DRX), com quantificação pelo método de refinamento de Rietveld. A atividade antimicrobiana foi avaliada pela técnica de difusão em ágar frente a Enterococcus faecalis ATCC 29212 e Candida albicans ATCC 90028, após 24 e 48 horas de incubação a 37 °C. A análise estatística foi realizada por meio de ANOVA unidirecional, seguida do teste post hoc de Bonferroni (p < 0,05). Resultados: O WPC + NPs-Ag apresentou composição cristalina semelhante à observada no WMTA e no Biodentine®, com predomínio de fases de silicato de cálcio e presença de prata metálica, sem alterações relevantes na matriz cimentícia. Do ponto de vista microbiológico, o material experimental apresentou zonas de inibição significativamente maiores frente a E. faecalis e C. albicans quando comparado ao WMTA e ao Biodentine® (p < 0,05). Conclusão: A incorporação de nanopartículas de prata ao cimento Portland branco potencializa sua atividade antimicrobiana sem modificar significativamente sua estrutura cristalina, sugerindo seu potencial como material experimental alternativo para aplicações endodônticas. No entanto, são necessários estudos adicionais para confirmar sua biocompatibilidade e desempenho clínico.

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Publicado

2026-03-13

Edição

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Ciências da Saúde

Como Citar

Caracterização microestrutural e avaliação da atividade antimicrobiana de nanopartículas de prata incorporadas em um cimento peruano de silicato de cálcio. Research, Society and Development, [S. l.], v. 15, n. 3, p. e4215350613, 2026. DOI: 10.33448/rsd-v15i3.50613. Disponível em: https://rsdjournal.org/rsd/article/view/50613. Acesso em: 24 mar. 2026.