Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites.

Autor: Velo MMAC; Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Al. Dr Octávio Pinheiro Brisolla, 9-75, Bauru, São Paulo, 17012-901, Brazil. mariliavelo@usp.br., Filho FGN; Department of Chemistry, Research and Extension Center for Fuels and Materials Laboratory (NPELACOM), Federal University of Paraiba, João Pessoa, Paraíba, Brazil., de Lima Nascimento TR; Department of Chemistry, Research and Extension Center for Fuels and Materials Laboratory (NPELACOM), Federal University of Paraiba, João Pessoa, Paraíba, Brazil., Obeid AT; Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Al. Dr Octávio Pinheiro Brisolla, 9-75, Bauru, São Paulo, 17012-901, Brazil., Castellano LC; Human Immunology Research and Education Group (GEPIH), UFPB Technical School of Health, Federal University of Paraíba, João Pessoa, Paraíba, Brazil., Costa RM; Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Al. Dr Octávio Pinheiro Brisolla, 9-75, Bauru, São Paulo, 17012-901, Brazil., Brondino NCM; Department of Mathematics, School of Sciences, São Paulo State University-UNESP, Bauru, São Paulo, Brazil., Fonseca MG; Department of Chemistry, Research and Extension Center for Fuels and Materials Laboratory (NPELACOM), Federal University of Paraiba, João Pessoa, Paraíba, Brazil., Silikas N; Dentistry, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, UK., Mondelli RFL; Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Al. Dr Octávio Pinheiro Brisolla, 9-75, Bauru, São Paulo, 17012-901, Brazil.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jun 17; Vol. 12 (1), pp. 10259. Date of Electronic Publication: 2022 Jun 17.
DOI: 10.1038/s41598-022-13766-1
Abstrakt: This in vitro study synthetized hybrid composite nanoparticles of graphene oxide (GO) and montmorillonite MMt (GO-MMt) by ultrasound treatments. Samples were characterized by X-ray diffraction, FT-Raman, FTIR, TEM and SEM. The effect of their incorporation (0.3% and 0.5%) on the mechanical properties in a resin-based composite (RBC) and their bioactivity potential were evaluated. The specimens were characterized by evaluating their 3-point flexural strength (n = 6), modulus of elasticity (n = 6), degree of conversion (n = 6), microhardness (n = 6), contact angle (n = 3) and SEM analysis (n = 3). In vitro test in SBF were conducted in the RBCs modified by the hybrid. Overall, the synthetized hybrid composite demonstrated that GO was intercalated with MMt, showing a more stable compound. ANOVA and Tukey test showed that RBC + 0.3% GO-MMt demonstrated superior values of flexural strength, followed by RBC + 0.5% GO-MMt (p < 0.05) and both materials showed higher values of microhardness. All groups presented a contact angle below 90°, characterizing hydrophilic materials. RBCs modified by the hybrid showed Ca and P deposition after 14 days in SBF. In conclusion, RBCs composed by the hybrid showed promising results in terms of mechanical properties and bioactive potential, extending the application of GO in dental materials.
(© 2022. The Author(s).)
Databáze: MEDLINE
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