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Surface characterization and microtensile bond strength of zirconia to resin cements after non-thermal plasma treatment and/or metallic primer

Grant number: 14/11602-4
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2014
Effective date (End): June 30, 2015
Field of knowledge:Health Sciences - Dentistry
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Daniela Micheline dos Santos
Grantee:Aljomar José Vechiato Filho
Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


Because of the high polycrystalline content on the composition of zirconia, the eching throught hydroflouric acid gel does not promote the necessary surface modifications for a satisfactory bonding of zirconia to resin cements. Therefore, obtaining an adequate bonding to such high polycrystalline material has been proven difficult. The purpose of the present study is (1) to analyze the zirconia surface through surface roughness, surface energy (contact angle of liquids), scanning electronic microscopy associated with spectroscopy of dispersive energy (SEM-EDS) before and after the surface treatment of zirconia with non-thermal plasma treatment, metallic primer and the association of both treatments and (2) to evaluate the microtensile bond strength of this ceramic system to two resin cements through the microtensile bond strength test after 24 hours of storage in distilled water at room temperature (baseline) or after 12.000 cycles of thermocycling (5 to 55°C) or after 150 days of storage in distilled water at 37±2°C. Zirconia discs will be fabricated and randomly distributed in 5 groups according to the surface treatment: control (G1), non-thermal plasma (G2), metallic primer (G3), non-thermal plasma + metallic primer (G4) and metallic primer + non-thermal plasma (G5). The microtensile bond strength test will be performed in an appropriated universal testing machine for microtensile bond strength EMIC DL 1000 (0.5mm per minute and 150N-load). The data of surface roughness, surface energy (contact angle of liquids) and microtensile bond strength will be submitted to the appropriate statistical analysis for comparison of the mean results. The SEM-EDS images will be visually compared between groups. (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)
DOS SANTOS, DANIELA MICHELINE; VECHIATO-FILHO, ALJOMAR JOSE; FREITAS DA SILVA, EMILY VIVIANNE; GOIATO, MARCELO COELHO; CESAR, PAULO FRANCISCO; RANGEL, ELIDIANE CIPRIANO; DA CRUZ, NILSON CRISTINO. Aging Effect of Atmospheric Air on Zirconia Surfaces Treated by Nonthermal Plasma. Journal of Adhesive Dentistry, v. 17, n. 5, p. 413-419, . (14/11602-4)
VECHIATO-FILHO, ALJOMAR JOSE; MATOS, ADAIAS OLIVEIRA; LANDERS, RICHARD; GOIATO, MARCELO COELHO; RANGEL, ELIDIANE CIPRIANO; DE SOUZA, GRACE MENDONCA; RICARDO BARAO, VALENTIM ADELINO; DOS SANTOS, DANIELA MICHELINE. Surface analysis and shear bond strength of zirconia on resin cements after non-thermal plasma treatment and/or primer application for metallic alloys. Materials Science & Engineering C-Materials for Biological Applications, v. 72, p. 284-292, . (14/11602-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
FILHO, Aljomar José Vechiato. Surface analysis and shear bond strength of zirconia on resin cements after non- thermal plasma treatment and/or primer application for metallic alloys. 2016. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Odontologia. Araçatuba Araçatuba.

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