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Experimental glass-infiltrated alumina-zirconia composites: characterization of microstructure, optical and mechanical properties.

Grant number: 19/08693-1
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): July 01, 2019
Effective date (End): May 31, 2023
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Estevam Augusto Bonfante
Grantee:Edmara Tatiely Pedroso Bergamo
Host 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):21/08018-2 - Nanomechanical layer characterization of graded ATZ and ZTA composites, BE.EP.PD


The glass infiltration in polycrystalline ceramic systems allows for better optical and mechanical properties, as well as, adhesion by silanization methods. Although such advantages have already been proven for zirconia, this material is susceptible to low temperature degradation (LTD). This problematic was the rationale behind the Young Investigator proposal #2012/19078-7 and has motived the development of zirconia-alumina composites (zirconia-toughened alumina - ZTA and alumina-toughened zirconia - ATZ). Preliminary data related to the development of a LTD-resistant ZTA composite with unaltered optical and mechanical properties have already been reported to FAPESP. Thus, this project seeks for the development of an additional innovation through the glass infiltration of ZTA and ATZ composites and the characterization of the optical and mechanical properties before and after the hydrothermal aging. Experimental ZTA 80%Al2O3-20%ZrO2 and ATZ 20%Al2O3-80%ZrO2 composites will be synthetized and infiltrated with specifically-formulated glasses. After sintering and polishing, half of the specimens will be aged and characterized by energy dispersive x-ray spectroscopy (EDS), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and x-ray diffraction (XRD). The density will be determined and the optical properties will be evaluated in a spectrophotometer. The hardness and fracture toughness will be measured using Vickers indentation test. The elastic modulus gradient through nanoindentation. The biaxial flexural strength test will be conducted for knowledge of survival probability, Weibull modulus and characteristic strength.

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Scientific publications (20)
(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)
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)
BERGAMO, EDMARA T. P.; YAMAGUCHI, SATOSHI; COELHO, PAULO G.; LOPES, ADOLFO C. O.; LEE, CHUNWOO; BONFANTE, GERSON; JALKH, ERNESTO B. BENALCAZAR; ARAUJO-JUNIOR, EVERARDO N. S. DE; BONFANTE, ESTEVAM A.. Survival of implant-supported resin-matrix ceramic crowns: In silico and fatigue analyses. Dental Materials, v. 37, n. 3, p. 523-533, . (16/17793-1, 12/19078-7, 16/18818-8, 19/08693-1)
BERGAMO, EDMARA T. P.; ZAHOUI, ABBAS; AMORIN IKEJIRI, LARISSA LURI; MARUN, MANOELA; DA SILVA, KIMBERLY PEIXOTO; COELHO, PAULO G.; SOARES, SIMONE; BONFANTE, ESTEVAM A.. Retention of zirconia crowns to Ti-base abutments: effect of luting protocol, abutment treatment and autoclave sterilization. JOURNAL OF PROSTHODONTIC RESEARCH, v. 65, n. 2, p. 171-175, . (12/19078-7, 19/08693-1, 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)
BONFANTE, ESTEVAM A.; LEARY, JOSEPH; DAHER, SHADI; MURCKO, LAURA; HIRAYAMA, MUNEKI; BERGAMO, EDMARA T. P.. Implants Placed in Adolescents Followed for Up to 15.5 Years: A Retrospective Case Series. INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS, v. 36, n. 3, p. 561-568, . (19/08693-1, 16/18818-8, 12/19078-7)
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)
VINICIUS PAVESI FARDIN; GERSON BONFANTE; PAULO G. COELHO; EDMARA T. P. BERGAMO; DIMORVAN BORDIN; MALVIN N. JANAL; NICK TOVAR; LUKASZ WITEK; ESTEVAM A. BONFANTE. Residual stress estimated by nanoindentation in pontics and abutments of veneered zirconia fixed dental prostheses. Journal of Applied Oral Science, v. 30, . (12/19078-7, 16/18818-8, 19/08693-1, 13/20806-0, 14/22859-6, 21/06730-7, 11/23177-8, 21/08018-2, 11/16377-0)
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)
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)
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)
FREITAS, MARIANA I. M.; GOMES, RAFAEL S.; RUGGIERO, MIRELLE M.; BERGAMO, EDMARA T. P.; BONFANTE, ESTEVAM A.; MARCELLO-MACHADO, RAISSA M.; DEL BEL CURY, ALTAIR A.. robability of survival and stress distribution of narrow diameter implants with different implant-abutment taper angle. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, v. 110, n. 3, . (19/08693-1, 12/19078-7)
BERGAMO, EDMARA T. P.; ZAHOUI, ABBAS; BARRERA, RAUL BRAVO; HUWAIS, SALAH; COELHO, PAULO G.; KARATEEW, EDWARD DWAYNE; BONFANTE, ESTEVAM A.. Osseodensification effect on implants primary and secondary stability: Multicenter controlled clinical trial. CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH, v. 23, n. 3, . (19/08693-1, 12/19078-7)
RAMALHO, ILANA; WITEK, LUKASZ; COELHO, PAULO G.; BERGAMO, EDMARA; PEGORARO, LUIZ FERNANDO; BONFANTE, ESTEVAM A.. Influence of Abutment Fabrication Method on 3D Fit at the Implant-Abutment Connection. International Journal of Prosthodontics, v. 33, n. 6, p. 641-647, . (17/19362-0, 19/08693-1, 16/18818-8, 12/19078-7, 19/14798-0, 16/17793-1)
RAMALHO, ILANA S.; BERGAMO, EDMARA T. P.; WITEK, LUKASZ; COELHO, PAULO G.; LOPES, ADOLFO C. O.; BONFANTE, ESTEVAM A.. Implant-abutment fit influences the mechanical performance of single-crown prostheses. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 102, . (12/19078-7, 19/14798-0, 16/17793-1, 19/08693-1, 16/18818-8)
EWERS, ROLF; MARINCOLA, MAURO; PERPETUINI, PAOLO; MORINA, ADELINA; BERGAMO, EDMARA T. P.; CHENG, YU-CHI; BONFANTE, ESTEVAM A.. Severely Atrophic Mandibles Restored With Fiber-Reinforced Composite Prostheses Supported by 5.0-mm Ultra-Short Implants Present High Survival Rates Up To Eight Years. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, v. 80, n. 1, p. 81-92, . (19/08693-1, 12/19078-7)
KARINA BERGAMO CARDOSO; EDMARA TATIELY PEDROSO BERGAMO; VITOR DE MORAES CRUZ; ILANA SANTOS RAMALHO; LUCAS FRACASSI DE OLIVEIRA LINO; ESTEVAM AUGUSTO BONFANTE. Three-dimensional misfit between Ti-Base abutments and implants evaluated by replica technique. Journal of Applied Oral Science, v. 28, . (12/19078-7, 18/19094-9, 19/08693-1, 16/18818-8)
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)
BERGAMO, EDMARA T. P.; CARDOSO, KARINA B.; LINO, LUCAS F. O.; CAMPOS, TIAGO M. B.; MONTEIRO, KELLI N.; CESAR, PAULO F.; GENOVA, LUIS A.; THIM, GILMAR P.; COELHO, PAULO G.; BONFANTE, ESTEVAM A.. Alumina-toughened zirconia for dental applications: Physicochemical, mechanical, optical, and residual stress characterization after artificial aging. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, v. 109, n. 8, p. 1135-1144, . (12/19078-7, 19/08693-1, 16/18818-8, 18/19094-9)

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