Shrinkage stress and temperature variation in resin composites cured via different photoactivation methods: Insights for standardisation of the photopolymerisation

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversity of British Columbia (UBC)-
Autor(es): dc.creatorSousa, Guilherme dos Santos-
Autor(es): dc.creatorGuimarães, Gabriel Felipe-
Autor(es): dc.creatorMarcelino, Edilmar-
Autor(es): dc.creatorRodokas, José Eduardo Petit-
Autor(es): dc.creatorJúnior, Arilson José de Oliveira-
Autor(es): dc.creatorCesarino, Ivana-
Autor(es): dc.creatorLeão, Alcides Lopes-
Autor(es): dc.creatorRiccardi, Carla dos Santos-
Autor(es): dc.creatorArjmand, Mohammad-
Autor(es): dc.creatorSimões, Rafael Plana-
Data de aceite: dc.date.accessioned2025-08-21T19:42:50Z-
Data de disponibilização: dc.date.available2025-08-21T19:42:50Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2021-07-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/polym13132065-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/233229-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/233229-
Descrição: dc.descriptionThe literature has shown that there is no consensus regarding the best resin composite photoactivation protocol. This study evaluated the efficiency of the conventional, soft-start, pulse-delay and exponential protocols for photoactivation of resin composites in reducing the shrinkage stress and temperature variation during the photopolymerisation. The photoactivation processes were performed using a photocuring unit and a smartphone app developed to control the irradiance according each photoactivation protocol. These photoactivation methods were evaluated applying photoactivation energies recommended by the resins manufactures. Three brands of resin composites were analysed: Z-250, Charisma and Ultrafill. The cure effectiveness was evaluated through depth of cure experiments. All results were statistically evaluated using one-way and multi-factor analysis of variance (ANOVA). The use of exponential and pulse-delay methods resulted in a significant reduction of the shrinkage stress for all evaluated resins; however, the pulse-delay method required too long a photoactivation time. The increases on the temperature were lower when the exponential photoactivation was applied; however, the temperature variation for all photoactivation protocols was not enough to cause damage in the restoration area. The evaluation of the depth of cure showed that all photoactivation protocols resulted in cured resins with equivalent hardness, indicating that the choice of an alternative photoactivation protocol did not harm the polymerisation. In this way, the results showed the exponential protocol as the best photoactivation technique for practical applications.-
Descrição: dc.descriptionUniversidade Estadual Paulista-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionMedical School Sao Paulo State University (UNESP), Avenue Prof. Mário Rubens Guimarães Montenegro, s/n-
Descrição: dc.descriptionDepartment of Bioprocess and Biotechnology School of Agriculture Sao Paulo State University (UNESP), Street José Barbosa de Barros, 1780-
Descrição: dc.descriptionSchool of Engineering Sao Paulo State University (UNESP), Avenue Eng. Luiz Edmundo Carrijo Coube, 14-01-
Descrição: dc.descriptionSchool of Engineering University of British Columbia (UBC), 3333 University Way-
Descrição: dc.descriptionMedical School Sao Paulo State University (UNESP), Avenue Prof. Mário Rubens Guimarães Montenegro, s/n-
Descrição: dc.descriptionDepartment of Bioprocess and Biotechnology School of Agriculture Sao Paulo State University (UNESP), Street José Barbosa de Barros, 1780-
Descrição: dc.descriptionSchool of Engineering Sao Paulo State University (UNESP), Avenue Eng. Luiz Edmundo Carrijo Coube, 14-01-
Descrição: dc.descriptionUniversidade Estadual Paulista: 05/2021-PROPG-
Descrição: dc.descriptionFAPESP: 2017/08188-0-
Descrição: dc.descriptionFAPESP: 2021/05045-9-
Idioma: dc.languageen-
Relação: dc.relationPolymers-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDental restoration failure-
Palavras-chave: dc.subjectLight-curing of dental adhesives-
Palavras-chave: dc.subjectLight-curing of dental resins-
Palavras-chave: dc.subjectPhotoactivation protocol-
Palavras-chave: dc.subjectSynthetic resins-
Título: dc.titleShrinkage stress and temperature variation in resin composites cured via different photoactivation methods: Insights for standardisation of the photopolymerisation-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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