Antibacterial effect, cytotoxicity, and bond strength of a modified dental adhesive containing silver nanoparticles

Autor(es)

Aguiar, Juliana Dias ; Pedrosa, Marlus da Silva ; Toma, Sergio Hiroshi ; Araki, Koiti ; Marques, Marcia Martins ; Medeiros, Igor Studart

• Tipo de documento: Artigo Científico
• Fonte: ODONTOLOGY; v. N/A, p. 8-pg., 2022-10-08.

Resumo

This study aimed to evaluate the antibacterial effect, cytotoxicity, and microtensile bond strength of an adhesive system containing silver nanoparticles (NAg). NAg was synthesized and incorporated (500 and 1000 ppm) into Scotchbond Multi-Purpose (SBMP) primer and bond. A microtensile bond test (mu TBS) was performed after 24 h and 1 year. The adhesive interface was characterized using a confocal Raman microscope. The antibacterial activity was assessed using agar diffusion and biofilm inhibition assays (S. mutans). MTT assay was used to assess the cytotoxicity of NAg-conditioned culture media on human dental pulp stem cells (hDPSCs). The results were statistically analyzed using analysis of variance and Tukey's tests (alpha = .01). Incorporating 500 and 1000 ppm of NAg in the SBMP did not affect the mu TBS after 24 h (p > 0.05). However, in the 1 year evaluation, 500 ppm presented the highest mu TBS values (p < 0.05). The addition of NAg at 500 and 1000 ppm in the primer and bond led to larger inhibition halos and colony-forming units than the control (p < 0.05). For the unpolymerized and polymerized groups, the combination of primer and bond presented the highest cytotoxic effects on hDPSCs (p < 0.05). In conclusion, incorporating 500 or 1000 ppm of NAg into an etch-and-rinse adhesive system led to an antibacterial effect without altering the cytotoxicity. SBMP at 500 ppm presented a higher mu TBS at 1 year. (AU)

• Processo FAPESP: 17/10894-0 - Avaliação da resistência de união, após pré-tratamento da dentina com nanopartículas de hidroxiapatita, efeito antimicrobiano e citotoxicidade de um adesivo modificado por nanopartículas de prata
• Beneficiário: Igor Studart Medeiros
• Modalidade de apoio: Auxílio à Pesquisa - Regular