Microstructural, mechanical, and optical characterization of an experimental aging-resistant zirconia-toughened alumina (ZTA) composite

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorNYU-
Autor(es): dc.contributorNYU Langone Med Ctr-
Autor(es): dc.contributorNYU Tandon Sch Engn-
Autor(es): dc.contributorInst Res Nucl Energy-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorAeronaut Technol Inst ITA-
Autor(es): dc.creatorLopes, A. C. O.-
Autor(es): dc.creatorCoelho, P. G.-
Autor(es): dc.creatorWitek, L.-
Autor(es): dc.creatorBenalcazar Jalkh, E. B.-
Autor(es): dc.creatorGenova, L. A.-
Autor(es): dc.creatorMonteiro, K. N.-
Autor(es): dc.creatorCesar, P. F.-
Autor(es): dc.creatorLisboa-Filho, P. N. [UNESP]-
Autor(es): dc.creatorBergamo, E. T. P.-
Autor(es): dc.creatorRamalho, I. S.-
Autor(es): dc.creatorCampos, T. M. B.-
Autor(es): dc.creatorBonfantea, E. A.-
Data de aceite: dc.date.accessioned2022-02-22T00:57:26Z-
Data de disponibilização: dc.date.available2022-02-22T00:57:26Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.dental.2020.08.010-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209717-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209717-
Descrição: dc.descriptionObjective. To evaluate the effect of aging on the microstructural, mechanical, and optical properties of an experimental zirconia-toughened alumina composite with 80%Al2O3 and 20%ZrO2 (ZTA Zpex) compared to a translucent zirconia (Zpex) and Alumina. Methods. Disc-shaped specimens were obtained by uniaxial and isostatic pressing the synthesized powders (n = 70/material). After sintering and polishing, half of the specimens underwent aging (20 h, 134 degrees C, 2.2 bar). Crystalline content and microstructure were evaluated using X-ray diffraction and scanning electron microscopy, respectively. Specimens underwent biaxial flexural strength testing to determine the characteristic stress, Weibull modulus, and reliability. Translucency parameter (TP) and Contrast ratio (CR) were calculated to characterize optical properties. Results. ZTA Zpex demonstrated a compact surface with a uniform dispersion of zirconia particles within the alumina matrix, and typical alumina and zirconia crystalline content. ZTA Zpex and alumina exhibited higher CR and lower TP than Zpex. ZTA Zpex and Zpex showed significantly higher characteristic stress relative to alumina. While aging did not affect optical and mechanical properties of ZTA Zpex and alumina, Zpex demonstrated a significant increase in translucency, as well as a in characteristic stress. Alumina reliability was significantly lower than others at 300 MPa, ZTA Zpex and Zpex reliability decreased at 800 MPa, except for aged Zpex. Significance. While aging did not affect the mechanical nor the optical properties of ZTA Zpex and alumina, it did alter both properties of Zpex. The results encourage further investigations to engineer ZTA as a framework material for long span fixed dental prostheses specially where darkened substrates, such as titanium implant abutments or endodontically treated teeth, demand masking. (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 Octavio Pinheiro Brisola 9-75, Bauru, SP, Brazil-
Descrição: dc.descriptionNYU, Coll Dent, Dept Biomat & Biomimet, New York, 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.descriptionInst Res Nucl Energy, Sao Paulo, SP, Brazil-
Descrição: dc.descriptionUniv Sao Paulo, Sch Dent, Dept Biomat & Oral Biol, Sao Paulo, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Dept Phys, Bauru, SP, Brazil-
Descrição: dc.descriptionAeronaut Technol Inst ITA, Phys Dept, Sao Jose Dos Campos, 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: 2016/17793-1-
Descrição: dc.descriptionFAPESP: 2017/19362-0-
Descrição: dc.descriptionFAPESP: 2018/03072-6-
Descrição: dc.descriptionFAPESP: 2019/08693-1-
Descrição: dc.descriptionFAPESP: 2019/14798-0-
Descrição: dc.descriptionFAPESP: 2019/00452-5-
Descrição: dc.descriptionCNPq: 304589/2017-9-
Descrição: dc.descriptionCNPq: 434487/2018-0-
Descrição: dc.descriptionCAPES: 001-
Formato: dc.formatE365-E374-
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-
Título: dc.titleMicrostructural, mechanical, and optical characterization of an experimental aging-resistant zirconia-toughened alumina (ZTA) composite-
Tipo de arquivo: dc.typelivro digital-
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