Biomechanical performance of three fiberglass post cementation techniques: Imaging, in vitro, and in silico analysis

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dc.contributor.authorHoshino, Isis Almela Endo [UNESP]
dc.contributor.authorDos Santos, Paulo Henrique [UNESP]
dc.contributor.authorBriso, Andre Luiz Fraga [UNESP]
dc.contributor.authorSundfeld, Renato Herman [UNESP]
dc.contributor.authorYamaguchi, Satoshi
dc.contributor.authorRocha, Eduardo Passos [UNESP]
dc.contributor.authorAnchieta, Rodolfo Bruniera [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionOsaka University Graduate School of Dentistry
dc.contributor.institutionCentro Universitario do Norte Paulista-UNIPOS UNORP
dc.date.accessioned2023-07-29T16:02:35Z
dc.date.available2023-07-29T16:02:35Z
dc.date.issued2023-01-01
dc.description.abstractPurpose: The structural integrity of the resin cement layer, the bond strength, and the biomechanical behavior of different fiberglass post cementation techniques were evaluated. Methods: Thirty-three bovine incisors were divided into three groups (n = 11): conventional fiberglass post (CFP), conventional fiberglass post in flared root canals (CFL), and relined fiberglass post (RFP). Six specimens from each group were submitted for high-resolution microcomputed tomography (μCT) to evaluate the integrity and presence/volume of voids at the resin cement layer. Finite element analysis (FEA) of two three-dimensional (3D) models of each group were conducted, one considered ideal (without interface defects) and another containing the conditions identified in the μCT analysis. Push-out bond strength tests were conducted for all specimens. Results: The CFL group had the greatest mean values of void (Thirds cervical: 73.67; middle: 95.67; apical: 47.33) and gap concentration (Thirds cervical: 14.67; middle: 15.83; apical: 8.33) compared with CFP and RFP. A significant difference in bond strength was observed between the cervical (1.33 MPa) and middle thirds (1.85 MPa) compared with the apical third (4.85 MPa) of the CFL. A significant difference was observed in the bond strength in the CFL (1.33 MPa) and RFP (3.29 MPa) in the cervical third, which were statistically similar to the bond strength of the CFP. The tensile stress distributions were similar in most structures, localized in the cervical region on the lingual surface. Conclusions: Structural defects in the interface layer might influence the bond strength and biomechanical behavior under the different fiberglass post cementations.en
dc.description.affiliationDepartment of Preventive Dentistry and Restorative Dentistry São Paulo State University (UNESP) School of Dentistry, SP
dc.description.affiliationDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry, SP
dc.description.affiliationDepartment of Biomaterials Science Osaka University Graduate School of Dentistry, Osaka
dc.description.affiliationDepartment of Prosthodontics Centro Universitario do Norte Paulista-UNIPOS UNORP, SP
dc.description.affiliationUnespDepartment of Preventive Dentistry and Restorative Dentistry São Paulo State University (UNESP) School of Dentistry, SP
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of Dentistry, SP
dc.format.extent103-111
dc.identifierhttp://dx.doi.org/10.2186/jpr.JPR_D_21_00253
dc.identifier.citationJournal of Prosthodontic Research, v. 67, n. 1, p. 103-111, 2023.
dc.identifier.doi10.2186/jpr.JPR_D_21_00253
dc.identifier.issn1883-1958
dc.identifier.scopus2-s2.0-85145968949
dc.identifier.urihttp://hdl.handle.net/11449/249543
dc.language.isoeng
dc.relation.ispartofJournal of Prosthodontic Research
dc.sourceScopus
dc.subjectCementation
dc.subjectFiberglass post
dc.subjectFinite element analysis
dc.subjectMicro CT
dc.subjectPorosity
dc.titleBiomechanical performance of three fiberglass post cementation techniques: Imaging, in vitro, and in silico analysisen
dc.typeArtigo

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