New treatment of internal surface of infrastructure: influence on fracture resistance of Y-TZP crowns

• Grant number: 12/05657-5
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): February 01, 2013
• Effective date (End): January 31, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal researcher: Marco Antonio Bottino
• Grantee: Fernanda Campos
• Home Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

The objective of this study is to evaluate the effect of different treatments of the internal surface of the infrastructure and mechanical cycling on the fracture resistance of Y-TZP crowns. 100 pillars will be machined in epoxy resin which will receive crowns with infrastructure in Y-TZP coated with veneering ceramic. The samples will be allocate in 10 groups according to the factors "treatment of inner surface" (4 levels - no treatment, application of overglaze, sandblasting with alumina particles of 110 µm and sandblasting with alumina coated with silica particles of 30 µm) and "mechanical cycling" (two levels - with and without mechanical cycling), besides there will be utilized the factor "cement" (2 levels - resin cement and zinc phosphate cement) only for those groups with no treatment of the inner surface. There will be performed 3.0 x 106 cycles of cycling mechanical with load of 50 N and frequency of 4 Hz. The compression test of the crown will be conduct in a universal testing machine (EMIC) at a speed of 1 mm/min in an aqueous environment (37 ° C). The fractured crowns will be examined under a stereomicroscope and scanning electron microscope to verify the failure mode. The results will be statistically analyzed by analysis of variance (ANOVA) and Tukey test (± = 5%). The data obtained will be discussed in front of the pertinent literature. (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)

CAMPOS, F.; VALANDRO, L. F.; FEITOSA, S. A.; KLEVERLAAN, C. J.; FEILZER, A. J.; DE JAGER, N.; BOTTINO, M. A. Adhesive Cementation Promotes Higher Fatigue Resistance to Zirconia Crowns. Operative Dentistry, v. 42, n. 2, p. 215-224, MAR-APR 2017. Web of Science Citations: 17.

Academic Publications

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

CAMPOS, Fernanda. Resistência à fadiga de infraestruturas de zircônia: influência da estratégia de cimentação. 2016. Doctoral Thesis - Universidade Estadual Paulista "Julio de Mesquita Filho" Instituto de Ciência e Tecnologia..