Effect of photodynamic therapy on the mechanical properties and bond strength of glass-fiber posts to endodontically treated intraradicular dentin

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dc.contributor.authorStrazzi Sahyon, Henrico Badaoui [UNESP]
dc.contributor.authorPereira da Silva, Paloma [UNESP]
dc.contributor.authorSilva de Oliveira, Murilo [UNESP]
dc.contributor.authorAngelo Cintra, Luciano Tavares [UNESP]
dc.contributor.authorGomes-Filho, João Eduardo [UNESP]
dc.contributor.authorHenrique dos Santos, Paulo [UNESP]
dc.contributor.authorSivieri-Araujo, Gustavo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:22:02Z
dc.date.available2018-12-11T17:22:02Z
dc.date.issued2018-08-01
dc.description.abstractStatement of problem: The use of photosensitizers in photodynamic therapy promotes intraradicular microbial reduction during nonsurgical endodontic therapy. However, studies are lacking on the consequences of the application of these agents on the mechanical properties of intraradicular dentin and on the bond strength of glass-fiber posts. Purpose: The purpose of this in vitro study was to evaluate the influence of photodynamic therapy on the bond strength of glass-fiber posts using a push-out test and, additionally, to measure the Martens hardness (MH) and elastic indentation modulus (Eit) of intraradicular dentin when different photosensitizers are used. Material and methods: Eighty bovine teeth were used to simulate experimental endodontic treatments. Biomechanical instrumentation was performed for all root canals, and the teeth were distributed into 5 groups: control—deionized water; methylene blue 50 mg/L + red laser; methylene blue 100 mg/L + red laser; curcumin 500 mg/L + blue LED; and curcumin 1000 mg/L + blue LED. The MH and Eit of intraradicular dentin were measured using an ultramicrohardness tester under a load of 3 mN (n=8). The push-out bond strength of glass-fiber posts to dentin was measured using a universal testing machine (n=8). Mechanical properties and bond strength data were subjected to the Kruskal−Wallis test, ANOVA, and Fisher least significant difference test (α=.05). Images of representative specimens were obtained using a scanning electron microscope. Results: The MH, Eit, and bond strength of intraradicular dentin were influenced by the photosensitizer used. In general, curcumin promoted lower mechanical properties values but higher bond strength values. Conclusions: Photosensitizers influenced the mechanical properties of intraradicular dentin and the bond strength of glass-fiber posts, and methylene blue at 50 mg/L had no marked effect on the mechanical properties of the dentin or the bond strength values.en
dc.description.affiliationPostgraduate student Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationDentistry graduate Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationAssociate Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationTitular Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationAssociate Professor Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationAssistant Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespPostgraduate student Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespDentistry graduate Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespAssociate Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespTitular Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespAssociate Professor Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.description.affiliationUnespAssistant Professor Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP)
dc.format.extent317.e1-317.e7
dc.identifierhttp://dx.doi.org/10.1016/j.prosdent.2018.05.009
dc.identifier.citationJournal of Prosthetic Dentistry, v. 120, n. 2, p. 317.e1-317.e7, 2018.
dc.identifier.doi10.1016/j.prosdent.2018.05.009
dc.identifier.file2-s2.0-85051080580.pdf
dc.identifier.issn0022-3913
dc.identifier.scopus2-s2.0-85051080580
dc.identifier.urihttp://hdl.handle.net/11449/176680
dc.language.isoeng
dc.relation.ispartofJournal of Prosthetic Dentistry
dc.relation.ispartofsjr1,087
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleEffect of photodynamic therapy on the mechanical properties and bond strength of glass-fiber posts to endodontically treated intraradicular dentinen
dc.typeArtigo
unesp.author.orcid0000-0002-8402-7408[7]

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Artigos - Materiais Odontológicos e Prótese - FOA
Artigos - Odontologia Restauradora - FOA