Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/327419
Type: Artigo
Title: Surface Analysis And Shear Bond Strength Of Zirconia On Resin Cements After Non-thermal Plasma Treatment And/or Primer Application For Metallic Alloys
Author: 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
Abstract: There is no established protocol for bonding zirconia (Y-TZP) with resin cements. Non-thermal plasma (NTP) may be an alternative for the clinical problems related to adhesion. The purpose of the present study was to characterize the surface of Y-TZP exposed to methane (CH4) NTP or coated with a layer of primer for metal alloys and the association between the two methods and to evaluate the effect of NTP treatment on bond strength between Y-TZP and two resin cements. A total of 235 Y-TZP discs (8 x 2 mm) were distributed into five groups: Co (no surface treatment), Pr (primer), NTP (methane plasma), Pr + NTP and NTP + Pr. The effect of the treatment type on the surface free energy, morphology, topography and chemical composition of the Y-TZP discs was investigated. The discs were cemented to composite resin substrates using Panavia F2.0 or RelyX U200. Shear bond strength (n = 10) analyses were performed (1 mm/min) before and after thermocycling (5-55 degrees C, 2000 cycles) on the bonded specimens. The data were analyzed with one and three-way ANOVAs and Bonferroni tests (alpha = 0.05). NTP reduced the surface energy and roughness of the Y-TZP discs. SEM-EDS and XPS analyses showed the presence of the organic thin film, which significantly improved the bond strength results when Rely X U200 was used, whereas the primer treatment was more effective with Panavia F2.0. Thermocycling significantly reduced the bond strength results of the NIP and Pr + NTP groups cemented with Rely X U200 and the Pr and NTP + Pr groups cemented with Panavia F2.0. Nonthermal plasma improves the bond strength between Rely X U200 and Y-TZP and also seems to have water-resistant behavior, whereas Panavia F2.0 showed better results when associated with primer. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Zirconia
Resin Cement
Bond Strength
Editor: Elsevier Science BV
Amsterdam
Citation: Materials Science And Engineering: C-materials For Biological Applications. Elsevier Science Bv, v. 72, p. 284 - 292, 2017.
Rights: fechado
Identifier DOI: 10.1016/j.msec.2016.11.033
Address: http://www-sciencedirect-com.ez88.periodicos.capes.gov.br/science/article/pii/S0928493116321129?via%3Dihub
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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