The impact of methylene blue photosensitizer, aPDT and a calcium hydroxide-based paste on the physicochemical and mechanical characteristics of root canal dentin and the bonding interface of fiberglass posts

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorCentro Paula Souza Araçatuba-
Autor(es): dc.contributorUniversidade Federal de Minas Gerais (UFMG)-
Autor(es): dc.contributorAarhus University-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorFaculty of Dentistry-
Autor(es): dc.creatorStrazzi-Sahyon, Henrico Badaoui-
Autor(es): dc.creatorBanci, Henrique Augusto-
Autor(es): dc.creatorMaltarollo, Thalya Fernanda Horsth-
Autor(es): dc.creatorMartinez, Carolina Martins Teixeira-
Autor(es): dc.creatorRocha, Eloísa Alexo-
Autor(es): dc.creatorFigueiredo, Roberto Braga-
Autor(es): dc.creatorGarcia, Dayana Cristina Silva-
Autor(es): dc.creatorConstantino, Carlos José Leopoldo-
Autor(es): dc.creatorSpin-Neto, Rubens-
Autor(es): dc.creatorDuarte, Marco Antonio Hungaro-
Autor(es): dc.creatorCintra, Luciano Tavares Angelo-
Autor(es): dc.creatordos Santos, Paulo Henrique-
Autor(es): dc.creatorSivieri-Araujo, Gustavo-
Data de aceite: dc.date.accessioned2025-08-21T19:31:45Z-
Data de disponibilização: dc.date.available2025-08-21T19:31:45Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jphotobiol.2024.112878-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/300147-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/300147-
Descrição: dc.descriptionPurpose: To investigate the influence of methylene blue (MB)-mediated antimicrobial photodynamic therapy (aPDT) and calcium hydroxide (CH) medication on the mechanical characteristics, degree of conversion (DC), quantification, and volume of gaps at the adhesive interface of glass fiber posts (GFPs) luted to distinct thirds of root canal dentin. Additionally, the microhardness (MH), elastic modulus (Eit), morphology, and chemical structure of the intraradicular dentin were assessed. Materials and methods: 6 experimental groups were formed by sorting 102 bovine incisors. Canals receiving deionized water irrigation as a negative control; canals receiving deionized water irrigation and filled with CH as a positive control; groups treated with CH + MB at 50 and 100 mg/L without irradiation; and groups treated with CH + MB at 50 and 100 mg/L irradiated by red laser for 60 s (660 nm; 100 mW; 6.5 J; 72 J/cm2). MH, Eit, and DC properties were evaluated for both the resin cement layer and root dentin substrate (n = 8). Volume and quantification of gaps at the bonding interface (n = 6), and dentin morphology and chemical content were investigated (n = 3). Data were analyzed using a repeated-measures 2-way ANOVA followed by Tukey post hoc analysis (α = 0.05). Results: The distinct intraradicular thirds and treatment with MB-mediated aPDT, whether activated or not, in combination with CH, had a significant impact on the mechanical characteristics of the root dentin. This effect was also observed in the MH, Eit, DC, quantification, and volume of gaps at the luting interface (P < .05). In general, a higher concentration of MB, whether activated by a red laser or not, led to lower values in the mechanical properties of the root dentin, as well as in MH, Eit, and DC at the adhesive interface (P < .05). Additionally, these groups exhibited higher values for quantification and volume of gaps at the luting substrate (P < .05). Scanning electron micrographs and energy dispersive X-ray spectra showed qualitative similarity among all groups, except for the negative experimental control group. Conclusions: MB-mediated aPDT at 50 mg/L, in combination with CH, demonstrated favorable physico-chemical and mechanical characteristics in intraradicular dentin, along with satisfactory mechanical features and the adhesive interface integrity for GFPs at all intraradicular depths. Clinical significance: MB-mediated aPDT at a concentration of 50 mg/L combined to CH medication represents a suitable choice for photosensitization in the context of intracanal disinfection following the biomechanical procedure and prior to luting of intraradicular restorations.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University – UNESP, SP-
Descrição: dc.descriptionDepartment of Preventive and Restorative Dentistry Discipline of Endodontics Araçatuba School of Dentistry São Paulo State University - UNESP, SP-
Descrição: dc.descriptionEtec Araçatuba - Public School Centro Paula Souza Araçatuba, SP-
Descrição: dc.descriptionDepartment of Metallurgical and Materials Engineering Federal University of Minas Gerais, MG-
Descrição: dc.descriptionDepartment of Materials Engineering and Civil Construction Federal University of Minas Gerais, MG-
Descrição: dc.descriptionDepartment of Physics School of Technology and Applied Sciences São Paulo State University - UNESP, SP-
Descrição: dc.descriptionSection of Oral Radiology Department of Dentistry and Oral Health Aarhus University-
Descrição: dc.descriptionDepartment of Restorative Dentistry Endodontics and Dental Materials Bauru School of Dentistry São Paulo University - USP, SP-
Descrição: dc.descriptionRestorative Dentistry Area University of Toronto Faculty of Dentistry-
Descrição: dc.descriptionDepartment of Prosthodontics and Periodontology Bauru School of Dentistry University of São Paulo - USP, SP-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University – UNESP, SP-
Descrição: dc.descriptionDepartment of Preventive and Restorative Dentistry Discipline of Endodontics Araçatuba School of Dentistry São Paulo State University - UNESP, SP-
Descrição: dc.descriptionDepartment of Physics School of Technology and Applied Sciences São Paulo State University - UNESP, SP-
Descrição: dc.descriptionCAPES: 001-
Descrição: dc.descriptionFAPESP: 2019/24328-1-
Descrição: dc.descriptionFAPESP: 2022/12118-5-
Idioma: dc.languageen-
Relação: dc.relationJournal of Photochemistry and Photobiology B: Biology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCalcium hydroxide-
Palavras-chave: dc.subjectDegree of conversion-
Palavras-chave: dc.subjectDentin-
Palavras-chave: dc.subjectMechanical properties-
Palavras-chave: dc.subjectMethylene blue-
Palavras-chave: dc.subjectPhotodynamic therapy-
Título: dc.titleThe impact of methylene blue photosensitizer, aPDT and a calcium hydroxide-based paste on the physicochemical and mechanical characteristics of root canal dentin and the bonding interface of fiberglass posts-
Tipo de arquivo: dc.typelivro digital-
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