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Experimental 70% Al2O3-30% ZrO2 composites: structural characterization and survival probability before and after aging

Grant number: 18/03072-6
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2018
Effective date (End): November 30, 2021
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Estevam Augusto Bonfante
Grantee:Ernesto Byron Benalcazar Jalkh
Home Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
Associated research grant:12/19078-7 - Development and processing of Al2O3-ZrO2 translucent composite for CAD/CAM monolithic prostheses: the effect of aging on biaxial flexural strength, AP.JP
Associated scholarship(s):19/00452-5 - EXPERIMENTAL 70%Al2O3-30%ZrO2 ZTA COMPOSITES: MECHANICAL, ESTRUCTURAL AND TOPHOGRAPHICAL CHARACTERIZATION, BE.EP.DR

Abstract

Yttrium stabilized Tetragonal Zirconia Polycrystal (Y-TZP) instability at low temperature due to the tetragonal to monoclinic phase transformation can lead to Low Temperature Degradation (LTD) and compromise its mechanical properties. This project proposes the synthesis, structural characterization and survival probability analyses of polycrystalline Zirconia-Toughened-Alumina composites (ZTA) in 70% (Al2O3) - 30% (ZrO2) composition, before and after artificial aging. The ceramic powders will be formulated for uniaxial and isostatic pressing of disk shaped specimens divided in three experimental groups: 1) Alumina (n=105) 2) Translucent Zirconia - Zpex (n=105) and 3) ZTA-Zpex (n=105). After sintering and polishing, half of the specimens for each group will be aged in autoclave (134°C, 2.2 bar, 20 hours) to simulate the LTD process. The specimens will be characterized by XRD for analyses of the crystalline phases. The possible changes in the surface after aging will be characterized by SEM and interferometry (Sa, Sq, Sdr) and mechanically by nanoindentation (hardness and modulus of elasticity). The biaxial flexural strength (ISO 6872: 2015) will be evaluated before (n=30/group) and after aging (n=30/group), for knowledge of survival probability, Weibull modulus and characteristic strength. To evaluate the fatigue survival, accelerated life tests will be performed (n=18/group), followed by qualitative fractographic analysis. This proposal is part of the "jovem pesquisador" Award FAPESP 2012/19078-7 and presents a schedule for BEPE scholarship. (AU)

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Scientific publications (17)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
JALKH, ERNESTO B. BENALCAZAR; PARRA, MARCELO; TORRONI, ANDREA; NAYAK, VASUDEV VIVEKANAND; TOVAR, NICK; CASTELLANO, ARTHUR; BADALOV, RAFAEL M.; BONFANTE, ESTEVAM A.; COELHO, PAULO G.; WITEK, LUKASZ. Effect of supplemental acid-etching on the early stages of osseointegration: A preclinical model. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 122, . (18/03072-6)
BENALCAZAR JALKH, E. B.; MACHADO, C. M.; GIANINNI, M.; BELTRAMINI, I; PIZA, M. M. T.; COELHO, P. G.; HIRATA, R.; BONFANTE, E. A.. Effect of Thermocycling on Biaxial Flexural Strength of CAD/CAM, Bulk Fill, and Conventional Resin Composite Materials. Operative Dentistry, v. 44, n. 5, p. E254-E262, . (12/19078-7, 16/18818-8, 18/03072-6, 19/00452-5, 16/18657-4)
BERGAMO, EDMARA T. P.; YAMAGUCHI, SATOSHI; LOPES, ADOLFO C. O.; COELHO, PAULO G.; DE ARAUJO-JUNIOR, EVERARDO N. S.; JALKH, ERNESTO B. BENALCAZAR; ZAHOUI, ABBAS; BONFANTE, ESTEVAM A.. Performance of crowns cemented on a fiber-reinforced composite framework 5-unit implant-supported prostheses: in silico and fatigue analyses. Dental Materials, v. 37, n. 12, p. 1783-1793, . (19/08693-1, 19/00452-5, 19/14798-0, 18/03072-6)
LOPES, A. C. O.; COELHO, P. G.; WITEK, L.; BENALCAZAR JALKH, E. B.; GENOVA, L. A.; MONTEIRO, K. N.; CESAR, P. F.; LISBOA FILHO, P. N.; BERGAMO, E. T. P.; RAMALHO, I. S.; et al. Nanomechanical and microstructural characterization of a zirconia-toughened alumina composite after aging. CERAMICS INTERNATIONAL, v. 45, n. 7, A, p. 8840-8846, . (12/19078-7, 17/19362-0, 16/17793-1, 16/18818-8, 18/03072-6)
PIVA, AMANDA MARIA DE OLIVEIRA DAL; TRIBST, JOAO PAULO MENDES; JALKH, ERNESTO BYRON BENALCAZAR; ANAMI, LILIAN COSTA; BONFANTE, ESTEVAM AUGUSTO; BOTTINO, MARCO ANTONIO. Minimal tooth preparation for posterior monolithic ceramic crowns: Effect on the mechanical behavior, reliability and translucency. Dental Materials, v. 37, n. 3, p. E140-E150, . (12/19078-7, 17/23059-1, 18/03984-5, 18/03072-6, 17/09104-4, 17/11535-3)
DE ABREU, JOAO LUIZ BITTENCOURT; SAMPAIO, CAMILA SOBRAL; BENALCAZAR JALKH, ERNESTO BYRON; HIRATA, RONALDO. Analysis of the color matching of universal resin composites in anterior restorations. Journal of Esthetic and Restorative Dentistry, v. 33, n. 2, p. 269-276, . (18/03072-6, 19/00452-5)
BENALCAZAR JALKH, ERNESTO B.; NETO, JUVENAL DE SOUZA; BERGAMO, EDMARA T. P.; MAIA, CAMILA F.; BONFANTE, ESTEVAM A.. Mechanical testing of four-unit implant-supported prostheses with extensive pink gingiva porcelain: The dentogingival prostheses proof of concept. Journal of Esthetic and Restorative Dentistry, . (19/00452-5, 16/18818-8, 18/03072-6, 12/19078-7, 19/08693-1)
DE OLIVEIRA LINO, LUCAS FRACASSI; MACHADO, CAMILA MOREIRA; DE PAULA, VITOR GUARCONI; VIDOTTI, HUGO ALBERTO; COELHO, PAULO G.; BENALCAZAR JALKH, ERNESTO BYRON; PEGORARO, THIAGO AMADEI; BONFANTE, ESTEVAM AUGUSTO. Effect of aging and testing method on bond strength of CAD/CAM fiber-reinforced composite to dentin. Dental Materials, v. 34, n. 11, p. 1690-1701, . (12/19078-7, 16/18818-8, 14/18463-0, 18/03072-6)
BERGAMO, EDMARA T. P.; BASTOS, TIAGO M. C.; LOPES, ADOLFO C. O.; JUNIOR, EVERARDO N. S. DE ARAUJO; COELHO, PAULO G.; JALKH, ERNESTO B. BENALCAZAR; ZAHOUI, ABBAS; BONFANTE, ESTEVAM A.. Physicochemical and mechanical characterization of a fiber-reinforced composite used as frameworks of implant-supported prostheses. Dental Materials, v. 37, n. 8, p. E443-E453, . (12/19078-7, 18/03072-6, 16/18818-8, 19/00452-5, 19/14798-0)
DE OLIVEIRA, PAULA GABRIELA FACIOLA PESSOA; BONFANTE, ESTEVAM A.; BERGAMO, EDMARA T. P.; DE SOUZA, SERGIO LUIS SCOMBATTI; RIELLA, LEONARDO; TORRONI, ANDREA; JALKH, ERNESTO B. BENALCAZAR; WITEK, LUKASZ; LOPEZ, CHRISTOPHER D.; ZAMBUZZI, WILLIAN FERNANDO; et al. Obesity/Metabolic Syndrome and Diabetes Mellitus on Peri-implantitis. TRENDS IN ENDOCRINOLOGY AND METABOLISM, v. 31, n. 8, p. 596-610, . (12/19078-7, 18/03072-6, 19/08693-1, 19/00452-5, 16/18818-8)
JALKH, ERNESTO BYRON BENALCAZAR; MONTEIRO, KELLI NUNES; CESAR, PAULO FRANCISCO; GENOVA, LUIS ANTONIO; BERGAMO, EDMARA T. P.; LOPES, ADOLFO COELHO DE OLIVEIRA; LIMA, ERICK; LISBOA-FILHO, PAULO NORONHA; CAMPOS, TIAGO MOREIRA BASTOS; WITEK, LUKASZ; et al. Aging resistant ZTA composite for dental applications: Microstructural, optical and mechanical characterization. Dental Materials, v. 36, n. 9, p. 1190-1200, . (19/08693-1, 19/00452-5, 17/19362-0, 18/03072-6, 12/19078-7, 16/17793-1, 16/18818-8)
TOVAR, NICK; JALKH, ERNESTO B. BENALCAZAR; RAMALHO, ILANA S.; COLON, RICARDO RODRIGUEZ; KIM, HEOIJIN; BONFANTE, ESTEVAM A.; TORRONI, ANDREA; COELHO, PAULO G.; WITEK, LUKASZ. Effects of relative centrifugation force on L-PRF: An in vivo submandibular boney defect regeneration study. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, v. 109, n. 12, p. 2237-2245, . (18/03072-6, 19/00452-5, 12/19078-7, 16/18818-8)
BERGAMO, EDMARA T. P.; CAMPOS, TIAGO M. B.; LOPES, ADOLFO C. O.; CARDOSO, KARINA B.; GOUVEA, MARCUS V. R.; ARAUJO-JUNIOR, EVERARDO N. S. DE; WITEK, LUKASZ; GIERTHMUEHLEN, PETRA C.; COELHO, PAULO G.; JALKH, ERNESTO B. BENALCAZAR; et al. Hydrothermal aging affects the three-dimensional fit and fatigue lifetime of zirconia abutments. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 124, . (18/03072-6, 19/14798-0, 19/08693-1, 19/19542-4, 12/19078-7, 20/12874-9, 19/00452-5, 16/18818-8)
BENALCAZAR JALKH, E. B.; COELHO, P. G.; WITEK, L.; BERGAMO, E. T. P.; LOPES, A. C. O.; MONTEIRO, K. N.; CESAR, P. F.; GENOVA, L. A.; LISBOA-FILHO, P. N.; ABREU, J. L. B.; et al. Nanoscale physico-mechanical properties of an aging resistant ZTA composite. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 123, . (18/03072-6, 19/08693-1, 12/19078-7, 16/18818-8, 19/00452-5, 17/19362-0, 16/17793-1)
DE ARAUJO-JUNIOR, EVERARDO N. S.; BERGAMO, EDMARA T. P.; CAMPOS, TIAGO M. B.; JALKH, ERNESTO B. BENALCAZAR; LOPES, ADOLFO C. O.; MONTEIRO, KELLI N.; CESAR, PAULO F.; TOGNOLO, FERNANDA C.; TANAKA, RICARDO; BONFANTE, ESTEVAM A.. Hydrothermal degradation methods affect the properties and phase transformation depth of translucent zirconia. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 112, . (19/08693-1, 19/14798-0, 12/19078-7, 19/00452-5, 16/18818-8, 18/03072-6)
LOPES, A. C. O.; COELHO, P. G.; WITEK, L.; BENALCAZAR JALKH, E. B.; GENOVA, L. A.; MONTEIRO, K. N.; CESAR, P. F.; LISBOA-FILHO, P. N.; BERGAMO, E. T. P.; RAMALHO, I. S.; et al. Microstructural, mechanical, and optical characterization of an experimental aging-resistant zirconia-toughened alumina (ZTA) composite. Dental Materials, v. 36, n. 12, p. E365-E374, . (16/17793-1, 17/19362-0, 18/03072-6, 12/19078-7, 19/14798-0, 19/08693-1, 19/00452-5, 16/18818-8)
BENALCAZAR JALKH, E. B.; BERGAMO, E. T. P.; MONTEIRO, K. N.; CESAR, P. F.; GENOVA, L. A.; LOPES, A. C. O.; LISBOA FILHO, P. N.; COELHO, P. G.; SANTOS, C. F.; BORTOLIN, F.; et al. Aging resistance of an experimental zirconia-toughened alumina composite for large span dental prostheses: Optical and mechanical characterization. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 104, . (19/08693-1, 19/00452-5, 16/24165-7, 17/19362-0, 18/03072-6, 16/18657-4, 19/14798-0, 12/19078-7, 16/18818-8, 16/17793-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
JALKH, Ernesto Byron Benalcazar. Experimental 70% Al2O3 - 30% ZrO2 composites: structural, topographical and mechanical characterization before and after aging. 2021. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) Bauru.

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