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

• Grant number: 18/22627-9
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: April 01, 2019
• End date: December 07, 2019
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Renata Marques de Melo Marinho
• Grantee: Larissa Marcia Martins Alves
• Supervisor: Yu Zhang
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil
• Institution abroad: New York University, United States
• Associated to the scholarship: 17/20633-9 - Sliding contact fatigue in translucent zirconia restorations after several surface finishes: survival and wear analyses, BP.DR

Abstract

The present study will evaluate the failure probability of translucent zirconiarestorations submitted to several surface finishes. 220 preparations will be made in G-10 to receive 1.0 mm thickness restorations made of YZ HT (N=100, n=20), KATANA UTML (N=100, n=20) or IPS EMAX CAD (n=20). Each zirconia group will be divided into five subgroups according to the surface finishing: Polishing (P) with diamond rubbers; Glazing (G) as recommended by the manufacturer; Polishing and Glazing (PG) associated; Silica Infiltration (SI); Glass Infiltration (GI). The restorations of lithium disilicate will receive a thin layer of glaze. The specimens will be subjected to sliding contact fatigue: load of 200 N, frequency of 4 Hz, sliding distance of 1.0 mm and 1,250,000 cycles, in distilled water at room temperature. Every 400,000 cycles, the test will be interrupted, and the restorations will be assessed for the presence of failures in a stereomicroscope (DiscoveryV20, Carl Zeiss, LLC, USA). If samples do not show any failures (cracks, chips, detachment from restorations and catastrophic fractures), 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%. Microstructural and wear analysis will be investigated. Also, fractographic analysis will be performed. (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, 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)

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)