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Type: Artigo de periódico
Title: Surface Characterisation And Bonding Of Y-tzp Following Non-thermal Plasma Treatment.
Author: Valverde, Guilherme B
Coelho, Paulo G
Janal, Malvin N
Lorenzoni, Fábio Cesar
Carvalho, Ricardo M
Thompson, Van P
Weltemann, Klaus-Dieter
Silva, Nelson R F A
Abstract: (1) To chemically characterise Y-TZP surface via X-ray photoelectron spectroscopy (XPS) and evaluate the surface energy levels (SE) after non-thermal plasma (NTP). (2) To test the microtensile bond strength (MTBS) of Y-TZP bonded to cured composite disks, after a combination of different surface conditioning methods. Twenty-four Y-TZP discs (13.5mm×4mm) were obtained from the manufacturer and composite resin (Z-100) discs with similar dimensions were prepared. All discs were polished to 600 grit and divided into 8 groups (n=3 disks each), four control (non-NTP treated) and four experimental (NTP treated for 10s) groups. All groups received one of the four following treatments prior to cementation with Rely×Unicem cement: sand-blasting (SB), a Clearfil ceramic primer (MDP), sand-blasting+MDP (SBMDP), or baseline (B), no treatment. SE readings and surface roughness parameters were statistically analysed (ANOVA, Tukey's, p<0.05). Mixed model and paired samples t-tests were used to compare groups on MTBS. XPS showed increase in O and decrease in C elements after NTP. The polar component increased for BP (42.20mN/m) and SBP (43.77mN/m). MTBS values for groups BP (21.3MPa), SBP (31MPa), MDPP (30.1MPa) and SBMDPP (32.3MPa) were significantly higher in specimens treated with NTP than their untreated counterparts B (9.1MPa), SB (14.4MPa), MDP (17.8MPa) and SBMDP (24.1MPa). (1) Increase of O and decrease of C led to higher surface energy levels dictated by the polar component after NTP; (2) NTP application increased MTBS values of Y-TZP surfaces.
Subject: Adhesiveness
Aluminum Oxide
Carbon Compounds, Inorganic
Coated Materials, Biocompatible
Composite Resins
Dental Bonding
Dental Etching
Dental Materials
Dental Polishing
Materials Testing
Photoelectron Spectroscopy
Plasma Gases
Resin Cements
Silicon Compounds
Silicon Dioxide
Stress, Mechanical
Surface Properties
Surface Tension
Tensile Strength
Citation: Journal Of Dentistry. v. 41, n. 1, p. 51-9, 2013-Jan.
Rights: fechado
Identifier DOI: 10.1016/j.jdent.2012.10.002
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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