Publicação: In Vitro and In Vivo Toxicity Evaluation of Colloidal Silver Nanoparticles Used in Endodontic Treatments
Carregando...
Arquivos
Data
2016-06-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Tipo
Artigo
Direito de acesso
Acesso aberto
Resumo
Introduction: Silver nanoparticles have been used for different purposes in dentistry, including endodontic treatments. The aim of this study was to determine the cytotoxicity of different types of silver nanoparticles on mouse fibroblast cell line L929 and the reaction of subcutaneous connective tissue of Wistar rats to these nanoparticles. Methods: Silver nanoparticles of an average size of 5 nm were synthesized with ammonia (SNA) or polyvinylpyrrolidone (SNP). L929 was exposed to SNA and SNP (0.1-100 mu g/mL), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and enzyme-linked immunosorbent assays were performed after 6, 24, and 48 hours. Culture medium was used as the control. Sixteen rats received, individually, 3 polyethylene tubes filled with a fibrin sponge embedded in 100 mu L SNA or SNP (1 mu g/mL). A fibrin sponge with no embedding was the control. Tissue reaction was performed qualitatively and quantitatively after 7, 15, 30, and 90 days of implantation in the dorsal connective tissue of Wistar rats. Results: SNA and SNP were cytotoxic to L929 in higher concentrations, with SNA significantly more toxic than SNP. SNA and SNP did not induce significant interleukin-1 beta and interleukin-6 production. The release of stern cell factor by L929 increased 48 hours after the treatment with SNP at 5 mu g/rnL. Histologic examination showed that the inflammatory responses caused by SNA and SNP at 1 mu g/mL were similar to the control in all experimental periods. Conclusions: It was concluded that SNA and SNP were not cytotoxic at 25 mu g/mL or lower concentrations. However, for safe clinical use, further studies establishing others points of its toxicologic profile are recommended.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Journal Of Endodontics. New York: Elsevier Science Inc, v. 42, n. 6, p. 953-960, 2016.
