Fatigue behavior of multilayer ceramic structures in traditional and reverse layering designs

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dc.contributor.authorContreras, Lisseth Patricia Claudio [UNESP]
dc.contributor.authorRodrigues, Camila Silva [UNESP]
dc.contributor.authorZucuni, Camila Pauleski
dc.contributor.authorValandro, Luiz Felipe
dc.contributor.authorMarocho, Susana Maria Salazar
dc.contributor.authorde Melo, Renata Marques [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionUniversity of Mississippi Medical Center
dc.contributor.institutionUniversidade Federal de Pernambuco (UFPE)
dc.date.accessioned2023-07-29T13:19:09Z
dc.date.available2023-07-29T13:19:09Z
dc.date.issued2023-01-01
dc.description.abstractPurpose: This study evaluated the fatigue failure load (FFL) and the number of cycles for fatigue failure (CFF) of traditional (porcelain layer up) and reversed (zirconia layer up) designs of porcelain-veneered zirconia samples prepared with heat-pressing or file-splitting techniques. Materials and Methods: Zirconia discs were prepared and veneered with heat-pressed or machined feldspathic ceramic. The bilayer discs were bonded onto a dentin-analog according to the bilayer technique and sample design: traditional heat-pressing (T-HP), reversed heat-pressing (R-HP), traditional file-splitting with fusion ceramic (T-FC), reversed file-splitting with fusion ceramic R-FC), traditional file-splitting with resin cement (T-RC), and reversed file-splitting with resin cement (R-RC). The fatigue tests were performed using the stepwise approach at 20 Hz, 10,000 cycles/step, step-size of 200 N starting at 600 N, and proceeding until failure detection or up to 2600 N if enduring. The failure modes (from radial and/or cone cracks) were analyzed in a stereomicroscope. Results: The reversed design decreased the FFL and CFF of bilayers prepared with heat-pressing and file-splitting with fusion ceramic. The T-HP and T-FC reached the highest results, which were statistically similar between them. The bilayers prepared by the file-splitting with resin cement (T-RC and R-RC) were similar to the R-FC and R-HP groups regarding FFL and CFF. Almost all reverse layering samples failed by radial cracks. Conclusions: The reverse layering design did not improve the fatigue behavior of porcelain veneered zirconia samples. The three bilayer techniques behaved similarly when used in the reversed design.en
dc.description.affiliationDepartment of Dental Materials and Prosthodontics Institute of Science and Technology São Paulo State University (UNESP), São Paulo
dc.description.affiliationDepartment of Restorative Dentistry Federal University of Santa Maria (UFSM), Rio Grande do Sul
dc.description.affiliationDepartment of Biomedical Materials Science University of Mississippi Medical Center
dc.description.affiliationGraduate Program in Dentistry Federal University of Pelotas (UFPel), Rio Grande do Sul
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics Institute of Science and Technology São Paulo State University (UNESP), São Paulo
dc.identifierhttp://dx.doi.org/10.1111/jopr.13705
dc.identifier.citationJournal of Prosthodontics.
dc.identifier.doi10.1111/jopr.13705
dc.identifier.issn1532-849X
dc.identifier.issn1059-941X
dc.identifier.scopus2-s2.0-85161403383
dc.identifier.urihttp://hdl.handle.net/11449/247550
dc.language.isoeng
dc.relation.ispartofJournal of Prosthodontics
dc.sourceScopus
dc.subjectbilayer crowns
dc.subjectbioinspiration
dc.subjectdental ceramics
dc.subjectporcelain-veneered zirconia
dc.titleFatigue behavior of multilayer ceramic structures in traditional and reverse layering designsen
dc.typeArtigo
unesp.author.orcid0000-0003-4162-3303[2]

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