Development and characterization of optical, topographic and crystalline phase properties of conventional ZTA composite for monolithic CAD/CAM prostheses

• Grant number: 16/18657-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2016
• End date: September 30, 2017
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Estevam Augusto Bonfante
• Grantee: Mariana Miranda de Toledo Piza
• 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

Abstract

Yttria tetragonal zirconia polycristals (Y-TZP) is a promising material but presents hydrothermal instability at low temperatures by transformation of the metastable tetragonal phase to monoclinic phase, which may lead to low temperature degradation (LTD), that may compromise the materials mechanical properties and the predictability of rehabilitation treatments in the long-term. This project aims to innovate in the synthesis of polycrystalline composites with 85% alumina reinforced by 15% of conventional zirconia (ZTA - zirconia toughened alumina) for the dental field which highlight the best features of both the alumina as well as the zirconia, resulting in materials with improved mechanical properties compared to alumina and resistant to LTD. A conventional ZTA composite will be fabricated with conventional zirconia powder. It will be characterized the optical properties, the crystalline phases by X-ray diffraction (XRD) and topography by scanning electron microscopy (SEM). The results will be analyzed as detailed in the innovation project (available at SAGE as: Anexo_31_Projeto Inovacao.pdf). (AU)

Scientific publications

(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.; 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, APR 2020. (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)

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, SEP-OCT 2019. (19/00452-5, 12/19078-7, 18/03072-6, 16/18818-8, 16/18657-4)