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New surfaces treatments influence on fatigue resistance of Y-TZP infrastructures and porcelain veneered crowns

Grant number: 11/22331-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2012
Effective date (End): May 31, 2015
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Marco Antonio Bottino
Grantee:Lilian Costa Anami Paulin
Home Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


The objective of this study is to investigate different surface treatments effects on Y-TZP infrastructure and feldspathic ceramic veneered crowns inner surface on fracture resistance, and to set the average number of mechanical cycles required for failure and their reliability coefficients and characteristic number of cycles to the joint failure. For this, 125 preparations will be machined in epoxy resin that will receive Y-TZP infrastructure by CAD/CAM system and veneered by feldspathic ceramic crowns. Five surface treatments will be tested (n=25): G1 and G5- cleaning with isopropyl alcohol; G2- overglaze applying; G3- 110¼m Al2O3 particles sandblasting; G4-30 ¼m SiO2 particles sandblasting. The crowns from G1 to G4 will be cemented to the respective preparations with resin cement and G5 will be cemented with zinc phosphate cement. The fatigue strength will be evaluated by the number of mechanical cycles required for specimens fracture under functional masticatory load. Failure mode will be observed in stereomicroscope and scanning electron microscopy and the results will be statistically analyzed by ANOVA and Tukey's test (5%). The results will also be analyzed by Weibull nonparametric statistics. The data obtained will be discussed in front of pertinent literature. (AU)

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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)
ANAMI, L. C.; LIMA, J. M. C.; VALANDRO, L. F.; KLEVERLAAN, C. J.; FEILZER, A. J.; BOTTINO, M. A. Fatigue Resistance of Y-TZP/Porcelain Crowns is Not Influenced by the Conditioning of the Intaglio Surface. Operative Dentistry, v. 41, n. 1, p. E1-E12, JAN-FEB 2016. Web of Science Citations: 18.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PAULIN, Lilian Costa Anami. Influência de tratamentos de superfície e agentes cimentantes na sobrevivência de coroas de Y-TZP recobertas por porcelana. 2015. 98 f. Doctoral Thesis - Universidade Estadual Paulista "Julio de Mesquita Filho" Instituto de Ciência e Tecnologia..

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