Advanced search
Start date

Characterization and evaluation of adherence to a policristalina of tetragonal zirconia ceramic partially stabilized with yttria

Grant number: 12/02945-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): July 01, 2012
Effective date (End): February 28, 2015
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Marco Antonio Bottino
Grantee:Sabrina Feitosa Sochacki
Host Institution: Faculdade de Odontologia (FOSJC). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


Objective: evaluate the parameters of adhesion between glaze and zirconia and zirconia + glaze and resin cement. The ceramic will be characterized (density, porosity, contact angle, scanning electron microscopy (SEM) and atomic force (AFM), energy-dispersive X-ray spectroscopy (EDX), grain boundary analysis, X-ray diffraction (XRD), Vickers hardness, fracture toughness, evaluation of elastic modulus and Poisson's ratio). For shear test between glaze and zirconia, specimens are prepared from Diazir full contour ceramic and divided into five groups: G1: untreated (control), G2: Surface AS-SINTERED + glaze; G3: blasting with aluminum oxide particles + glaze; G4: sandblasting with Al2O3 particles 30 microns modified silicon oxide (Cojet ® Sand, 3M ESPE) + glaze; G5: Piranha Solution treatment + glaze. Topography and roughness analysis of the surface will be performed AFM, EDS, SEM, optical digital perfilometry, contact angle analysis and Scratch test. For bond strength test between resin cement and ceramic treated (G1-G5) specimens' bars are made of zirconia. After the treatment, the surfaces will be etched with hydrofluoric acid and silanized. The cementation will be made with Variolink (Ivoclar Vivadent). Half of the specimens of each treatment will be tested 24 hours after cementation (immediate group), the other shall be subject to storage (90 days and thermocycling oven cycles 6000-G6: TC + G1 and G7: TC + G2, G8, G3 + CT ' G9: G4 + CT; G10: G5 + CT) and then will be held the shear test (1mm/min). For analysis of the retention force and bond strength, zirconia infrastructures will be made and adapted to a model in epoxy resin reinforced by glass fibers simulating a coronary preparation where the same surface treatment described above. The data obtained at different stages will be analyzed statistically. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items

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)
SATO, TABATA PRADO; ARATA, ANELYSE; DE MIRANDA, LARISSA MENDONCA; BOTTINO, MARCO ANTONIO; DE MELO, RENATA MARQUES; ZHANG, YU; SOUZA, RODRIGO OTHAVIO ASSUNCAO. Effect of Porcelain-to-Zirconia Ratio and Bonding Strategy on the Biaxial Flexural Strength and Weibull Characteristics of a Stress-Free Bilayer CAD/CAM Ceramic System. International Journal of Prosthodontics, v. 35, n. 4, p. 11-pg., . (12/02945-0)
FEITOSA, SABRINA A.; CAMPOS, FERNANDA; YOSHITO, WALTER KENJI; LAZAR, DOLORES R. R.; USSUI, VALTER; VALANDRO, LUIZ FELIPE; BOTTINO, MARCO A.; BOTTINO, MARCO C.. Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns. INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, v. 85, p. 106-112, . (12/02945-0)
FEITOSA, SABRINA A.; LIMA, NELSON B.; YOSHITO, WALTER K.; CAMPOS, FERNANDA; BOTTINO, MARCO A.; VALANDRO, LUIZ F.; BOTTINO, MARCO C.. Bonding strategies to full-contour zirconia: Zirconia pretreatment with piranha solution, glaze and airborne-particle abrasion. INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, v. 77, p. 151-156, . (12/02945-0)

Please report errors in scientific publications list using this form.