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

• Grant number: 12/05657-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: February 01, 2013
• End date: January 31, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Marco Antonio Bottino
• Grantee: Fernanda Campos
• Host 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. (12/05657-5)

Academic Publications

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

CAMPOS, Fernanda. Fatigue resistance of zirconia infrastructures: influence of cementation strategy. 2016. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. São José dos Campos São José dos Campos.