Development and mechanical and optical characterization of 80% Al2O3 and 20% ZrO2 translucent composites for CAD/CAM monolithic prostheses

• Grant number: 16/17793-1
• Support type: Scholarships in Brazil - Master
• Effective date (Start): October 01, 2016
• Effective date (End): March 31, 2019
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal researcher: Estevam Augusto Bonfante
• Grantee: Adolfo Coelho de Oliveira Lopes
• 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): 17/19362-0 - DEVELOPMENT, MECHANICAL AND OPTICAL CHARACTERIZATION OF 80% AL2O3 AND 20% ZRO2 ZTA COMPOSITES FOR CAD/CAM PROSTHESES, BE.EP.MS

Abstract

Yttrium tetragonal zirconia polycristals (Y-TZP) is a promising material that presents hydrothermal instability at low temperatures due to metastable transformation of the tetragonal to monoclinic phase, which may lead to low temperature degradation (LTD), eventually compromising the mechanical properties and reliability of prosthetic treatments in the long-term. This project aims to innovate in the synthesis of polycrystalline composites comprised by 80% alumina reinforced with 20% translucent zirconia (ZTA - zirconia toughened alumina) for dentistry seeking for the best properties of both alumina and zirconia resulting in materials with improved mechanical resistance compared to alumina and resistant to LTD. ZTA composites will be fabricated with translucent zirconia powders to improve optical properties, and a control Y-TZP experimental group made with translucent powder will be used for comparisons. Materials optical properties, crystalline phases, and biaxial flexural resistance and reliability will be evaluated both before and after an accelerated aging protocol. Results will be analyzed as described in detail in the main project comprising the auxílio JP, present at SAGE as: Anexo_31_Projeto Inovacao.pdf. (AU)

Scientific publications

(10)

(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)

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.; CAMPOS, T. M. B.; CANTEENWALA, A.; BONFANTE, E. A. Nanoscale physico-mechanical properties of an aging resistant ZTA composite. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 123, NOV 2021. Web of Science Citations: 0.

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, MAR 2021. Web of Science Citations: 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.; CAMPOS, T. M. B.; BONFANTEA, E. A. Microstructural, mechanical, and optical characterization of an experimental aging-resistant zirconia-toughened alumina (ZTA) composite. Dental Materials, v. 36, n. 12, p. E365-E374, DEC 2020. Web of Science Citations: 0.

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, NOV-DEC 2020. Web of Science Citations: 0.

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; COELHO, PAULO G.; BORGES, ANA FLAVIA SANCHES; BONFANTE, ESTEVAM A. Aging resistant ZTA composite for dental applications: Microstructural, optical and mechanical characterization. Dental Materials, v. 36, n. 9, p. 1190-1200, SEP 2020. Web of Science Citations: 0.

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.; PIZA, M. M. T.; BONFANTE, E. A. 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, APR 2020. Web of Science Citations: 0.

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, FEB 2020. Web of Science Citations: 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.; BONFANTE, E. A. Nanomechanical and microstructural characterization of a zirconia-toughened alumina composite after aging. CERAMICS INTERNATIONAL, v. 45, n. 7, A, p. 8840-8846, MAY 2019. Web of Science Citations: 2.

DE OLIVEIRA LOPES, ADOLFO COELHO; MACHADO, CAMILA MOREIRA; BONJARDIM, LEONARDO RIGOLDI; PEDROSO BERGAMO, EDMARA TATIELY; RAMALHO, ILANA SANTOS; WITEK, LUKASZ; COELHO, PAULO GUILHERME; BONFANTE, ESTEVAM AUGUSTO. The Effect of CAD/CAM Crown Material and Cement Type on Retention to Implant Abutments. JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY, v. 28, n. 2, p. E552-E556, FEB 2019. Web of Science Citations: 0.

PUCCIARELLI, MARIA G. R.; LOPES, ADOLFO C. O.; LOPES, JOSE F. S.; SOARES, SIMONE. Implant placement for patients with cleft lip and palate: A clinical report and guidelines for treatment. JOURNAL OF PROSTHETIC DENTISTRY, v. 121, n. 1, p. 9-12, JAN 2019. Web of Science Citations: 0.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

LOPES, Adolfo Coelho de Oliveira. Microstructural, mechanical, and optical characterization of a ZTA (zirconia-toughened alumina) composite after aging. 2019. Master's Dissertation - Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) Bauru.