Sliding contact fatigue in translucent zirconia restorations after several surface finishes: survival and wear analyses

• Grant number: 17/20633-9
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2018
• End date: March 07, 2021
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Renata Marques de Melo Marinho
• Grantee: Larissa Marcia Martins Alves
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil
• Associated scholarship(s): 18/22627-9 - Sliding contact fatigue in translucent zirconia restorations after several surface finishes: survival and wear analyse, BE.EP.DR

Abstract

The present study will evaluate the failure probability of thin translucent zirconia restorations submitted to several surface finishes. 220 preparations will be made in G-10 and will be used to receive the restorations (0.5 mm thickness), 100 in YZ HT, 100 in KATANA UTML and 20 in IPS EMAX CAD. Each group of zirconia will be divided into five subgroups according to surface finishing: Polishing (P) diamond rubbers with 2 granulations; Glaze (G) thin layer of glaze recommended by the manufacturer; Polishing and Glaze (PG) polishing and glaze associated; Infiltration with Silica (IS); Infiltration with glass (IV). The restorations of lithium disilicate will receive a thin layer of glaze.The specimens will be subjected to sliding contact fatigue. Test parameters: load of 200 N, frequency of 1,7 Hz, sliding distance of 0.1 mm and 2.106 cycles, in distilled water at room temperature. Every 200,000 cycles, the machine will be stopped and the crowns will be assessed for the presence of failures in a stereomicroscope (DiscoveryV20, Carl Zeiss, LLC, USA). If samples do not show any failure (cracks, chipping, debonding of restorations and catastrophic failures), the fatigue test will continue until they fail or until the test is finished. Specimens that do not fail will be considered "suspended" in the analysis. Results from this evaluation will be subjected to reliability analysis with the Weibull method, with bilateral confidence interval of 90%. Also, there will be an optical profilometer for qualitative surface evaluation, X-ray diffraction analysis, structural analysis with scanning electron microscope, measurement of volume loss (optical profilometer) and fractographic analysis. (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)

ALVES, L. M. M.; RODRIGUES, C. S.; VARDHAMAN, S.; SAUNDERS, C.; SCHNEIDER, J. M.; LAWN, B. R.; ZHANG, Y.. Exploring Ductility in Dental Ceramics. JOURNAL OF DENTAL RESEARCH, v. N/A, p. 7-pg., 2022-06-10. (17/20633-9, 18/22627-9)

ALVES, LARISSA MARCIA MARTINS; RODRIGUES, CAMILA DA SILVA; RAMOS, NATHALIA DE CARVALHO; BUIZASTROW, JEFF; CAMPOS, TIAGO MOREIRA BASTOS; BOTTINO, MARCO ANTONIO; ZHANG, YU; DE MELO, RENATA MARQUES. Silica infiltration on translucent zirconia restorations: Effects on the antagonist wear and survivability. Dental Materials, v. 38, n. 12, p. 12-pg., 2022-11-30. (17/20633-9, 18/22627-9)

MARTINS ALVES, LARISSA MARCIA; RODRIGUES, CAMILA DA SILVA; RAMOS, GABRIELA FREITAS; BASTOS CAMPOS, TIAGO MOREIRA; DE MELO, RENATA MARQUES. ear behavior of silica-infiltrated monolithic zirconia: Effects on the mechanical properties and surface characterizatio. CERAMICS INTERNATIONAL, v. 48, n. 5, p. 6649-6656, MAR 1 2022. (18/22627-9, 17/20633-9, 16/07920-6, 15/11405-7)

Academic Publications

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

ALVES, Larissa Marcia Martins. Fadiga deslizante em restaurações de zircônia translúcida submetidas a diferentes acabamentos de superfície: probabilidade de sobrevivência e potencial de desgaste. 2021. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. São José dos Campos São José dos Campos.