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Nanomechanical layer characterization of graded ATZ and ZTA composites

Grant number: 21/08018-2
Support Opportunities:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): January 17, 2022
Effective date (End): January 16, 2023
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Estevam Augusto Bonfante
Grantee:Edmara Tatiely Pedroso Bergamo
Supervisor: Lukasz Witek
Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
Research place: New York University, United States  
Associated to the scholarship:19/08693-1 - Experimental glass-infiltrated alumina-zirconia composites: characterization of microstructure, optical and mechanical properties., BP.PD


Y-TZP presents the highest mechanical properties among all-ceramic systems available, however it is susceptible to low temperature degradation, which may compromise physical and mechanical properties of prostheses. This problematic was the motivation behind the Young Investigator Grant FAPESP #2012/19078-7 and has allowed the development of aging-resistant alumina-zirconia composites (ZTA and ATZ). Bioinspired glass infiltration in Y-TZP systems has demonstrated improved optical and mechanical properties, as well as adhesive bond strength. In this post-doctoral scholarship FAPESP #2019/08693-1, we proposed the glass infiltration of the developed ZTA and ATZ composites to boost their physical and mechanical properties, where a graded layer of 100 um and an increase of 250 MPa in flexural strength relative to non-infiltrated composites was observed. For comprehensive characterization of the graded materials, this BEPE proposal aims to further evaluate the mechanical properties of the layers and throughout their transitions of graded ZTA and ATZ composites using nanoscale indentation and finite element analysis (FEA). Experimental ZTA and ATZ disc-shaped specimens will be processed and infiltrated with silicate glasses. After sintering, the specimens will be sectioned and polished. Half of them will be subjected to hydrothermal aging. Nanoindentation will be performed by means of a Berkovich diamond pyramid probe at several regions of interest at intervals of 25 um to determine the gradient of hardness, elastic modulus, and residual stress of the glass, graded, and composite layers. The collected properties will be used to design a disc (ISO 6872:2015) for in silico non-linear dynamic FEA to be correlated with biaxial flexural strength data. (AU)

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Scientific publications (14)
(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)
FARDIN, VINICIUS P.; BERGAMO, EDMARA T. P.; BORDIN, DIMORVAN; HIRATA, RONALDO; BONFANTE, ESTEVAM A.; BONFANTE, GERSON; COELHO, PAULO G.. Effect of different tightening protocols on the probability of survival of screw-retained implant-supported crowns. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 126, . (21/08018-2, 11/16377-0, 16/18818-8, 13/20806-0, 14/22859-6, 21/06730-7, 11/23177-8)
BENALCAZAR-JALKH, ERNESTO B.; NAYAK, VASUDEV VIVEKANAND; GORY, CHRISTINA; MARQUEZ-GUZMAN, ANDRES; BERGAMO, EDMARA T. P.; TOVAR, NICK; COELHO, PAULO G.; BONFANTE, ESTEVAM A.; WITEK, LUKASZ. Impact of implant thread design on insertion torque and osseointegration: a preclinical model. MEDICINA ORAL PATOLOGIA ORAL Y CIRUGIA BUCAL, v. 28, n. 1, p. 8-pg., . (21/06730-7, 19/00452-5, 12/19078-7, 21/08018-2, 16/18818-8, 19/08693-1, 22/07157-1, 18/03072-6)
CHENG, YU-CHI; BERGAMO, EDMARA T. P.; MURCKO, LAURA; HIRAYAMA, MUNEKI; PERPETUINI, PAOLO; SPERATTI, DRAUSEO; BONFANTE, ESTEVAM A.. Fiber-reinforced composite partial fixed dental prostheses supported by short or extra-short implants: A 10 year retrospective study. CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH, v. 24, n. 6, p. 8-pg., . (19/08693-1, 21/06730-7, 21/08018-2)
PACHECO-VERGARA, MARIA JESUS; BENALCAZAR-JALKH, ERNESTO BYRON; NAYAK, VASUDEV V.; BERGAMO, EDMARA T. P.; CRONSTEIN, BRUCE; ZETOLA, ANDRE LUIS; WEISS, FERNANDO PESSOA; GROSSI, JOAO RICARDO ALMEIDA; DELIBERADOR, TATIANA MIRANDA; COELHO, PAULO G.; et al. Employing Indirect Adenosine 2(A) Receptors (A(2A)R) to Enhance Osseointegration of Titanium Devices: A Pre-Clinical Study. JOURNAL OF FUNCTIONAL BIOMATERIALS, v. 14, n. 6, p. 13-pg., . (21/08018-2, 19/08693-1, 19/00452-5, 22/07157-1, 18/03072-6)
JALKH, ERNESTO B. BENALCAZAR; RAMALHO, ILANA S.; BERGAMO, EDMARA T. P.; ALVES, LARISSA M. M.; TANAKA, RICARDO; WITEK, LUKASZ; COELHO, PAULO G.; HIRATA, RONALDO; BONFANTE, ESTEVAM A.. Ultrathin lithium disilicate and translucent zirconia crowns for posterior teeth: Survival and failure modes. Journal of Esthetic and Restorative Dentistry, v. N/A, p. 10-pg., . (21/06730-7, 21/08018-2, 22/05496-3, 21/07440-2, 12/19078-7, 16/18818-8, 19/08693-1, 22/07157-1, 22/05495-7)
BENALCAZAR-JALKH, ERNESTO B.; DE CARVALHO, LAURA F.; ALVES, LARISSA M. M.; CAMPOS, TIAGO M. B.; SOUSA, EDISA DE OLIVEIRA; BERGAMO, EDMARA T. P.; COELHO, PAULO G.; GIERTHMUEHLEN, PETRA C.; SPITZNAGEL, FRANK A.; ZAHOUI, ABBAS; et al. Reliability and Failure Mode of Ti-Base Abutments Supported by Narrow/Wide Implant Systems. DENTISTRY JOURNAL, v. 11, n. 9, p. 11-pg., . (21/06730-7, 21/08018-2, 20/12874-9, 21/07440-2, 16/18818-8, 19/08693-1, 19/00452-5, 22/07157-1, 18/03072-6)
JALKH, ERNESTO B. BENALCAZAR; BERGAMO, EDMARA T. P.; CAMPOS, TIAGO M. B.; DE ARAUJO-JUNIOR, EVERARDO N. S.; LOPES, ADOLFO C. O.; TEBCHERANI, SERGIO M.; YAMAGUCHI, SATOSHI; GENOVA, LUIS A.; GIERTHMUEHLEN, PETRA C.; WITEK, LUKASZ; et al. Stability of fatigued and aged ZTA compared to 3Y-TZP and Al2O3 ceramic systems. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 135, p. 9-pg., . (19/08693-1, 17/19362-0, 21/06730-7, 16/17793-1, 19/00452-5, 18/03072-6, 12/19078-7, 16/18818-8, 21/08018-2, 22/07157-1)
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, . (16/18818-8, 11/16377-0, 12/19078-7, 14/22859-6, 19/08693-1, 21/06730-7, 21/08018-2, 13/20806-0, 11/23177-8)
ALVES, LARISSA M. M.; CAMPOS, TIAGO M. B.; BERGAMO, EDMARA T. P.; BENALCAZAR JALKH, ERNESTO B.; GIERTHMUEHLEN, PETRA C.; SAILER, IRENA; THIM, GILMAR P.; STRAZZI-SAHYON, HENRICO B.; CELESTRINO, MARCOS; GUIMARAES, CAROLINA C. L.; et al. Hydrofluoric acid concentration and etching time affect differently the microstructure and surface properties of pressed lithium disilicate glass ceramics. Journal of Esthetic and Restorative Dentistry, v. N/A, p. 9-pg., . (21/06730-7, 21/08018-2, 20/12874-9, 21/07440-2, 19/08693-1, 22/07157-1, 22/12118-5)
CHENG, YU-CHI; PERPETUINI, PAOLO; MURCKO, LAURA; HIRAYAMA, MUNEKI; MORGAN, KATHERINE; MARINCOLA, MAURO; BONFANTE, ESTEVAM A.; BERGAMO, EDMARA T. P.; EWERS, ROLF. Fiber-reinforced composite full-arch prosthetic reconstructions supported by three standard, short or extra-short implants: a two-center retrospective study. CLINICAL ORAL INVESTIGATIONS, v. 27, n. 8, p. 13-pg., . (21/06730-7, 19/08693-1, 21/08018-2)
BERGAMO, EDMARA T. P.; BALDERRAMA, ISIS DE FATIMA; FERREIRA, MARCEL RODRIGUES; SPIELMAN, ROBERT; SLAVIN, BLAIRE V.; TORRONI, ANDREA; TOVAR, NICK; NAYAK, VASUDEV V.; SLAVIN, BENJAMIN R.; COELHO, PAULO G.; et al. Osteogenic differentiation and reconstruction of mandible defects using a novel resorbable membrane: An in vitro and in vivo experimental study. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, v. 111, n. 11, p. 13-pg., . (21/08018-2, 18/05731-7, 19/08693-1, 21/14557-3, 21/14271-2)
BONFANTE, ESTEVAM A.; CALAMITA, MARCELO; BERGAMO, EDMARA T. P.. Indirect restorative systems-A narrative review. Journal of Esthetic and Restorative Dentistry, v. N/A, p. 21-pg., . (21/06730-7, 16/18818-8, 21/08018-2, 12/19078-7)
BERGAMO, EDMARA T. P.; LOPES, ADOLFO C. O.; CAMPOS, TIAGO M. B.; AMORIM, PEDRO HENRIQUE; COSTA, FABIO; BENALCAZAR-JALKH, ERNESTO B.; DE CARVALHO, LAURA F.; ZAHOUI, ABBAS; PIZA, MARIANA M. T.; GUTIERRES, ELIEZER; et al. Probability of survival and failure mode of endodontically treated incisors without ferrule restored with CAD/CAM fiber-reinforced composite (FRC) post-cores. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 136, p. 10-pg., . (21/06730-7, 19/00452-5, 20/12874-9, 12/19078-7, 21/08018-2, 19/14798-0, 16/18818-8, 20/16500-6, 22/07157-1, 18/03072-6)
BERGAMO, EDMARA T. P.; CAMPOS, TIAGO M. B.; PIZA, MARIANA M. T.; GUTIERREZ, ELIEZER; LOPES, ADOLFO C. O.; WITEK, LUKASZ; COELHO, PAULO G.; CELESTRINO, MARCOS; CARVALHO, LAURA F. DE; BENALCAZAR, ERNESTO B.; et al. Temporary materials used in prosthodontics: The effect of composition, fabrication mode, and aging on mechanical properties. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 133, p. 10-pg., . (20/12874-9, 20/16500-6, 21/06730-7, 19/08693-1, 22/07157-1, 21/08018-2, 19/14798-0, 16/18818-8)

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