Impact of photoinitiator quality on chemical-mechanical properties of dental adhesives under different light intensities

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dc.contributor.authorDa Silva, Tânia Mara [UNESP]
dc.contributor.authorDe Faria Petrucelli, Nícolas [UNESP]
dc.contributor.authorDe Mendonça, Rafael Pinto [UNESP]
dc.contributor.authorDa Silva Júnior, Jefferson Pires [UNESP]
dc.contributor.authorCampos, Tiago Moreira Bastos
dc.contributor.authorDe Paiva Gonçalves, Sérgio Eduardo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2023-07-29T13:36:43Z
dc.date.available2023-07-29T13:36:43Z
dc.date.issued2023-01-01
dc.description.abstractObjective: Evaluate the mechanical properties of experimental adhesive models with different photoinitiators (PI) polymerized by LED units of different power densities. Material and Methods: Three groups of adhesive models based on HEMA/BisGMA (45/55) were prepared in association with different PI combinations: G2 (control) – 2 PI: 0.5% CQ, 0.5% EDMAB; G3-3 PI: 0.5% CQ; 0.5% DMAEMA, 0.5% DPIHP; G4-4 PI: 0.5% CQ; 0.5% EDMAB; 0.5% DMAEMA; 0.5% DPIHP. The three formulations were polymerized at two different LED power densities: 550 mW/cm2 and 1200 mW/cm2. The degree of conversion (DC) of adhesive monomers was monitored in situ through the FTIR for 600 s. Specimens were prepared for each formulation for analysis of flexural strength (FS), modulus of elasticity (ME), sorption (SOR) and solubility (SOL). Data were submitted to two-way ANOVA and Tukey tests (5%). Results: DC: there is a significant difference among adhesive systems (G2<G3<G4). FS and ME: significant differences were found between densities, with the lowest average for 550 mW/cm2. SOR and SOL: adhesives polymerized at 1200 mW/cm2 presented higher sorption and solubility. Conclusion: The mechanical properties of the adhesive models are directly related to the types of photoinitiatiors and the LED power densities.en
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho-UNESP Instituto de Ciência e Tecnologia de São José dos Campos Departamento de Odontologia Restauradora, SP
dc.description.affiliationUniversidade de São Paulo-USP Faculdade de Odontologia de Bauru Departamento de Prótese e Periodontia, SP
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho-UNESP Instituto de Ciência e Tecnologia de São José dos Campos Departamento de Odontologia Restauradora, SP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 20/12874-9
dc.identifierhttp://dx.doi.org/10.4322/bds.2023.e3704
dc.identifier.citationBrazilian Dental Science, v. 26, n. 1, 2023.
dc.identifier.doi10.4322/bds.2023.e3704
dc.identifier.issn2178-6011
dc.identifier.scopus2-s2.0-85146173003
dc.identifier.urihttp://hdl.handle.net/11449/248179
dc.language.isoeng
dc.relation.ispartofBrazilian Dental Science
dc.sourceScopus
dc.subjectDental adhesive
dc.subjectIrradiance
dc.subjectLight-curing
dc.subjectPhotoinitiators
dc.subjectPhysicochemical phenomena
dc.titleImpact of photoinitiator quality on chemical-mechanical properties of dental adhesives under different light intensitiesen
dc.titleImpacto da qualidade de fotoiniciadores nas propriedades químico mecânicas de adesivos dentais sob diferentes intensidades de luzpt
dc.typeArtigo

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