Effect of hydrothermal and mechanical aging on the fatigue performance of high-translucency zirconias

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.contributorAeronautics Technological Institute (ITA)-
Autor(es): dc.creatorPrado, Pedro Henrique Condé Oliveira-
Autor(es): dc.creatorDapieve, Kiara Serafini-
Autor(es): dc.creatorCampos, Tiago Moreira Bastos-
Autor(es): dc.creatorValandro, Luiz Felipe-
Autor(es): dc.creatorMelo, Renata Marques de-
Data de aceite: dc.date.accessioned2025-08-21T23:37:29Z-
Data de disponibilização: dc.date.available2025-08-21T23:37:29Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.dental.2022.04.021-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240020-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240020-
Descrição: dc.descriptionObjectives: This study aimed to evaluate the impact of mechanical fatigue cycling using the step-stress approach along with hydrothermaldegradation (134 ºC with a constant pressure of 2 bars for 20 h), and a novel intercalated hydrothermal/fatigue aging protocol on different aspects of the aging resistance of three generations of dental zirconias. Methods: “Y”Z T (VITA), INCORIS “T”ZI (Dentsply Sirona) and “K”ATANA UTML (Noritake Kuraray) − 1st, 2nd and 3rd generation, respectively-, zirconia disks (N = 153), were divided into 6 groups (n = 3) for monotonic testing and 9 groups (n = 15) for mechanical fatigue testing, according to 3 proposed treatments for each zirconia: CF (control – only mechanical fatigue cycling); AF (aging in hydrothermal reactor at 134 °C for 20 h + mechanical fatigue cycling); AFA (Alternating protocol: 4 steps of 5 h of hydrothermal aging intercalated with mechanical fatigue cycling). Mechanical fatigue aging was performed according to the step-stress approach through biaxial flexural setup (piston-on-3-balls, initial strength: 100 MPa, step: 50 MPa/10,000, frequency: 20 Hz) until failure. Data were analyzed using Kaplan-Meier and Mantel-Cox test (α = 0.05), in addition to Weibull analysis. Fractured disks were analyzed in stereomicroscope, Scanning Electron Microscopy and X-Ray Diffraction. Results: Continuous hydrothermal and mechanical fatigue cycling decreased the fatigue strength of YAF group (516 ± 38 MPa), while the alternating protocol increased it (730 ± 58 MPa). KATANA UTML showed no differences for both treatments and did not undergo t-m phase transformation. The TAF group showed the highest fatigue strength (810 ± 76 MPa) and cycles for failure (147,000.00 cycles). The fracture origin for all specimens was on the tensile side in pre-existing defects. Significance: INCORIS TZI zirconia had higher fatigue strength and survival rates after hydrothermal and mechanical fatigue aging. Although less resistant, KATANA UTML did not suffer chemical degradation.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionPost-Graduate Program in Restorative Dentistry (Prosthodontics Unit) São Paulo State University (UNESP) Science and Technology Institute, São Paulo-
Descrição: dc.descriptionPost-Graduate Program in Oral Science (Prosthodontics Unit) Faculty of Odontology Federal University of Santa Maria - UFSM, Rio Grande do Sul-
Descrição: dc.descriptionPhysics Departament Aeronautics Technological Institute (ITA), São Paulo-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and Technology, São Paulo-
Descrição: dc.descriptionPost-Graduate Program in Restorative Dentistry (Prosthodontics Unit) São Paulo State University (UNESP) Science and Technology Institute, São Paulo-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and Technology, São Paulo-
Descrição: dc.descriptionCAPES: # 001-
Formato: dc.format1060-1071-
Idioma: dc.languageen-
Relação: dc.relationDental Materials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDegradation-
Palavras-chave: dc.subjectDental ceramics-
Palavras-chave: dc.subjectFatigue-
Palavras-chave: dc.subjectY-TZP-
Palavras-chave: dc.subjectZirconia-
Título: dc.titleEffect of hydrothermal and mechanical aging on the fatigue performance of high-translucency zirconias-
Tipo de arquivo: dc.typelivro digital-
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