Effect of the addition of functionalized TiO2 nanotubes and nanoparticles on properties of experimental resin composites

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorOregon Hlth & Sci Univ-
Autor(es): dc.contributorPosit Univ Curitiba-
Autor(es): dc.creatorFreitas Guimaraes, Genine Moreira de-
Autor(es): dc.creatorBronze-Uhle, Erika Soares-
Autor(es): dc.creatorLisboa-Filho, Paulo Noronha [UNESP]-
Autor(es): dc.creatorPiovezan Fugolin, Ana Paula-
Autor(es): dc.creatorSanches Borges, Ana Flavia-
Autor(es): dc.creatorGonzaga, Carla Castiglia-
Autor(es): dc.creatorPfeifer, Carmem Silvia-
Autor(es): dc.creatorFuruse, Adilson Yoshio-
Data de aceite: dc.date.accessioned2022-02-22T00:57:27Z-
Data de disponibilização: dc.date.available2022-02-22T00:57:27Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.dental.2020.09.013-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209720-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209720-
Descrição: dc.descriptionObjective. To evaluate the influence of the addition of functionalized and non-functionalized TiO2 nanostructures on properties of a resin composite. Methods. TiO2 nanostructures were synthesized and functionalized, using 3(aminopropyl)triethoxysilane (APTMS) and 3-(trimethoxysilyl)propyl methacrylate (TSMPM). Characterizations were performed with XRD, EDS, TEM, and TGA. Resin composites containing Bis-GMA/TEGDMA, CQ, DABE, and barium-aluminum silicate glass were produced according to TiO2 nanostructure (nanotube or nanoparticle), concentration (0.3 or 0.9 wt%), and functionalization (APTMS or TSMPM). The resin composite without nanostructures was used as control. The amount of fillers was kept constant at 78.3 wt% for all materials. The degree of conversion (DC at 0 h and 24 h), maximum polymerization rate (Rp(max)), and Knoop microhardness (KHN before and after ethanol softening) were evaluated. Data were analyzed with two-way ANOVA with repeated measures and Tukey's HSD (a = 0.05). Results. TGA results demonstrated that functionalizations were effective for both nanostructures. For DC, resin composites, time and interaction effect were significant (p < 0.001). Higher DC was found for 0.3-wt%-functionalized-nanotubes at 24 h. For nanoparticles, only 0.9-wt%-non-functionalized and 0.3-wt%-APTMS-functionalized showed DC similar to the control and all other groups showed higher DC (p < 0.05). Rpmax was higher for 0.3-wt%APTMS-nanotubes, which corresponded to higher DC after 24 h. The lowest Rpmax occurred for 0.9-wt%-TSMPM-nanotubes, which showed smaller DC at 0 h. For KHN, resin composites, ethanol softening and interaction effect were significant (p < 0.001). KHN decreased after ethanol softening all groups, except for 0.3-wt%-TSMPM-nanotubes, 0.9-wt%-TSMPMnanotubes, and 0.3-wt%-non-functionalized-nanoparticles. Conclusion. The resin with 0.3-wt%-TSMPM-nanotubes showed higher DC after 24 h, while being the most stable material after the ethanol softening. Significance. The addition of functionalized TiO2 nanostructures in resin-based materials may improve the properties of the material. (C) 2020 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionUniv Sao Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, Bauru, SP, Brazil-
Descrição: dc.descriptionState Univ Sao Paulo, Fac Sci, Dept Phys, Bauru, SP, Brazil-
Descrição: dc.descriptionOregon Hlth & Sci Univ, Dept Restorat Dent, Div Biomat & Biomech, Portland, OR 97201 USA-
Descrição: dc.descriptionPosit Univ Curitiba, Sch Hlth Sci, Grad Program Dent, Curitiba, Parana, Brazil-
Descrição: dc.descriptionState Univ Sao Paulo, Fac Sci, Dept Phys, Bauru, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2017/23331-3-
Descrição: dc.descriptionFAPESP: 2019/05427-9-
Descrição: dc.descriptionCAPES: 001-
Formato: dc.format1544-1556-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationDental Materials-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectTitanium dioxide-
Palavras-chave: dc.subjectNanostructures-
Palavras-chave: dc.subjectFunctionalization-
Palavras-chave: dc.subjectPolymer structure-
Palavras-chave: dc.subjectMethacrylates-
Título: dc.titleEffect of the addition of functionalized TiO2 nanotubes and nanoparticles on properties of experimental resin composites-
Tipo de arquivo: dc.typelivro digital-
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