fa Surface characterisation and bonding of Y-TZP following non-thermal plasma treatment پروتزهای دندانی Prothtodontics پژوهشي Research <p> <strong>Objectives </strong></p><p> (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.</p><p> <strong> Methods</strong> </p><p> 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. </p><p> <strong>Results</strong></p><p>  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). </p><p> <strong>Conclusions</strong></p><p>  (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. </p><hr><p></p><p> <strong>Source: </strong>Journal of Dentistry</p><p> <a href="http://www.jodjournal.com/article/S0300-5712(12)00276-X/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> Adhesion, Contact angle, Microtensile, Non-thermal plasma, Surface energy, Y-TZP 0 0 http://idai.ir/browse.php?a_code=A-10-32-2096&slc_lang=fa&sid=1 Guilherme B. Valverde 10031947532846009815 10031947532846009815 Yes Piracicaba School of Dentistry-UNICAMP-Brazil, Department of Prosthodontics and Operative Dentistry, Tufts University, School of Dental Medicine, Boston, MA, USA Paulo G. Coelho 10031947532846009816 10031947532846009816 No Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA Malvin N.Janal 10031947532846009817 10031947532846009817 No Department of Epidemiology and Health Promotion, New York University College of Dentistry, New York, USA Fábio Cesar Lorenzoni 10031947532846009818 10031947532846009818 No Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA Ricardo M. Carvalho 10031947532846009819 10031947532846009819 No Department of Oral Biological and Medical Science, Division of Biomaterials, University of British Columbia, Faculty of Dentistry, Vancouver, BC, Canada Van P. Thompson 10031947532846009820 10031947532846009820 No Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA Klaus-Dieter Weltemann 10031947532846009821 10031947532846009821 No Leibniz Institute for Plasma Science and Technology, Greifswald, Germany Nelson R.F.A. Silva 10031947532846009822 10031947532846009822 No Department of Restorative Dentistry, Federal University of Minas Gerais-UFMG, Belo Horizonte, MG, Brazil