Aging resistant ZTA composite for dental applications: Microstructural, optical and mechanical characterization

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorInst Res Nucl Energy-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorTechnol Inst Aeronut-
Autor(es): dc.contributorNYU-
Autor(es): dc.contributorNYU Langone Med Ctr-
Autor(es): dc.contributorNYU Tandon Sch Engn-
Autor(es): dc.creatorJalkh, Ernesto Byron Benalcazar-
Autor(es): dc.creatorMonteiro, Kelli Nunes-
Autor(es): dc.creatorCesar, Paulo Francisco-
Autor(es): dc.creatorGenova, Luis Antonio-
Autor(es): dc.creatorBergamo, Edmara T. P.-
Autor(es): dc.creatorLopes, Adolfo Coelho de Oliveira-
Autor(es): dc.creatorLima, Erick-
Autor(es): dc.creatorLisboa-Filho, Paulo Noronha [UNESP]-
Autor(es): dc.creatorCampos, Tiago Moreira Bastos-
Autor(es): dc.creatorWitek, Lukasz-
Autor(es): dc.creatorCoelho, Paulo G.-
Autor(es): dc.creatorBorges, Ana Flavia Sanches-
Autor(es): dc.creatorBonfante, Estevam A.-
Data de aceite: dc.date.accessioned2022-02-22T00:11:31Z-
Data de disponibilização: dc.date.available2022-02-22T00:11:31Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.dental.2020.05.011-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/197192-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/197192-
Descrição: dc.descriptionObjective. To synthesize a zirconia toughened alumina (ZTA) composite with 70% alumina reinforced by 30% zirconia for dental applications and to characterize its microstructure and optical properties for comparison with the isolated counterpart materials and a first-generation 3Y-TZP. Methods. Disc-shaped specimens were divided in four groups (n = 70/material): (1) 3YSB-E (first generation 3Y-TZP), (2) Zpex (second generation 3Y-TZP), (3) alumina, and (4) ZTA-Zpex 70/30. After synthesis, ceramic powders were pressed, and green-body samples sintered following a predetermined protocol. Specimens were polished to obtain a mirror surface finish. Apparent density was measured by Archimedes principle. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the crystalline content and microstructure. Reflectance tests were performed to determine the contrast-ratio (CR) and translucency-parameter (TP). Mechanical properties were assessed by biaxial flexural strength (BFS) test. All analyses were conducted before and after artificial aging (20 h, 134 degrees C 2.2 bar). Optical parameters were evaluated through repeated-measures analysis of variance and Tukey tests (p < 0.05). BFS data were analyzed using Weibull statistics (95% CI). Results. High density values (95-99%) were found for all ceramic materials and SEM images exhibited a dense microstructure. While XRD patterns revealed the preservation of crystalline content in the ZTA composite, an increase in the monoclinic peak was observed for pure zirconias after aging. Significantly higher CR and lower TP values were observed for the ZTA composite, followed by alumina, 3YSB-E, and Zpex. The highest characteristic stress was recorded for 3YSB-E, followed by intermediate values between ZTA and Zpex, and the lowest for alumina. Aging affected the optical and mechanical properties of both zirconias, while remained stable for ZTA composite and alumina. Significance. The synthesis of experimental 70-30% ZTA composite was successful and its relevance for dental applications relies on its higher masking ability, aging resistance, and strength similar to zirconia. (C) 2020 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionUniv Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodontol, Al Otavio Pinheiro Brisola 9-75, Bauru, SP, Brazil-
Descrição: dc.descriptionUniv Sao Paulo, Sch Dent, Dept Biomat & Oral Biol, Sao Paulo, SP, Brazil-
Descrição: dc.descriptionInst Res Nucl Energy, Sao Paulo, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Dept Phys, Bauru, SP, Brazil-
Descrição: dc.descriptionTechnol Inst Aeronut, Sao Jose Dos Campos, SP, Brazil-
Descrição: dc.descriptionNYU, Coll Dent, Dept Biomat & Biomimet, New York, NY USA-
Descrição: dc.descriptionNYU, Tandon Sch Engn, Dept Biomed Engn, Brooklyn, NY USA-
Descrição: dc.descriptionNYU Langone Med Ctr, Hansjorg Wyss Dept Plast Surg, New York, NY USA-
Descrição: dc.descriptionNYU Tandon Sch Engn, Mech & Aerosp Engn, New York, NY USA-
Descrição: dc.descriptionUniv Sao Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, Bauru, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Dept Phys, Bauru, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2012/19078-7-
Descrição: dc.descriptionFAPESP: EMU 2016/18818-8-
Descrição: dc.descriptionFAPESP: 2018/03072-6-
Descrição: dc.descriptionFAPESP: 2019/00452-5-
Descrição: dc.descriptionFAPESP: 2019/08693-1-
Descrição: dc.descriptionFAPESP: 2016/17793-1-
Descrição: dc.descriptionFAPESP: 2017/19362-0-
Descrição: dc.descriptionCNPq: 304589/2017-9-
Descrição: dc.descriptionCNPq: 434487/2018-0-
Descrição: dc.descriptionCAPES: 001-
Formato: dc.format1190-1200-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationDental Materials-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectComposites-
Palavras-chave: dc.subjectZrO2-Al2O3-
Palavras-chave: dc.subjectMechanical properties-
Palavras-chave: dc.subjectOptical properties-
Palavras-chave: dc.subjectMicrostructure-
Título: dc.titleAging resistant ZTA composite for dental applications: Microstructural, optical and mechanical characterization-
Tipo de arquivo: dc.typelivro digital-
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