fa Durable bonding to mechanically and/or chemically pre-treated dental zirconia سلامت دهان و جامعه نگر Oral Health and Epidemiology پژوهشي Research <p> <strong>Objectives</strong></p><p>  To evaluate the effect of mechanical and chemical surface pre-treatment on the bond durability of two composite cements to dental zirconia. </p><p> <strong>Methods </strong></p><p> Fully sintered IPS e.max ZirCAD (Ivoclar-Vivadent) blocks were either subjected to tribochemical silica sandblasting (CoJet, 3M ESPE) or not mechanically pre-treated. Next, the zirconia samples were either additionally pre-treated using one of two silane/MDP-combined ceramic primers (Clearfil Ceramic Primer, Kuraray Monobond Plus, Ivoclar-Vivadent), or not further chemically pre-treated. Finally, two identically pre-treated zirconia blocks were bonded together using either a conventional BisGMA-based (Clearfil Esthetic Cement, Kuraray) or an MDP-based (Panavia F2.0, Kuraray) ‘self-etch’ dual-cure composite cement. The specimens were trimmed at the interface to a cylindrical hour-glass shape and stored for 7 days in distilled water (37°C), after which they were randomly exposed to one of three ageing protocols: (1) immersed in 37°C water for 10 days (10d) (2) subjected to 10,000 thermo-cycles (TC) or (3) immersed in 37°C water for 6 months (6m). After storage, the micro-tensile bond strength (μTBS) was determined in MPa (n=15–21/group). Fractographic analysis was performed using SEM. </p><p> <strong>Results</strong></p><p>  Weibull analysis revealed the highest Weibull scale and shape parameters for the ‘CoJet/Clearfil Ceramic Primer/Panavia F2.0/10d’ combination. While the BisGMA-based composite cement Clearfil Esthetic Cement (Kuraray) bonded equally well to zirconia using either tribochemical silica sandblasting (CoJet, 3M ESPE) or not, sandblasting appeared indispensable for the MDP-based and more hydrophilic composite cement Panavia F2.0 (Kuraray). </p><p> <strong>Conclusions</strong></p><p>  Combined mechanical and chemical pre-treatment can best be recommended to durably bond to zirconia. <strong></strong></p><p> <strong>Clinical significance</strong> </p><p> As a standard procedure to durable bond zirconia to tooth tissue, both mechanical (tribochemical silica coating) and chemical (silane/MDP-combined ceramic primers) is clinically highly recommended. </p><hr><p></p><p> <strong>Source: </strong>Journal of Dentistry</p><p><a href="http://www.jodjournal.com/article/S0300-5712(12)00301-6/abstract" target="_blank"><font color="#0000ff"> Full Text</font></a></p> Zirconia, Bond strength, Tribochemical silica sandblasting, Silane, Composite cement, Ageing 0 0 http://idai.ir/browse.php?a_code=A-10-32-2111&slc_lang=fa&sid=1 Masanao Inokoshi 10031947532846009897 10031947532846009897 No KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven), & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok a bus 7001, B-3000 Leuven, Belgium Atsushi Kameyama 10031947532846009898 10031947532846009898 No KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven), & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok a bus 7001, B-3000 Leuven, Belgium Jan De Munck 10031947532846009899 10031947532846009899 No KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven), & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok a bus 7001, B-3000 Leuven, Belgium Shunsuke Minakuchi 10031947532846009900 10031947532846009900 No Complete Denture Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan Bart Van Meerbeek 10031947532846009901 10031947532846009901 Yes KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven), & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok a bus 7001, B-3000 Leuven, Belgium