Effect of Various Surface Treatments on the Bond Strength Between Composite Resin and Zirconia Veneering Ceramic
This study compared the effect of different surface treatments according to four intraoral repair systems on the shear bond strength between a composite resin and a zirconia veneering ceramic. Forty disk shape ceramic specimens were divided into four groups according to the repair systems: Group I-CoJet™ Intraoral Adhesive Repair System (3M ESPE, Seefeld, Germany), Group II-Ceramic Repair System (Ivoclar Vivadent, Schann, Liechtenstein), Group III-Porcelain Repair Kit (Ultradent, South Jordan, USA), and Group IV-Signum Ceramic Bond (Heraeus, Germany). The composite resin (Z350, 3M-ESPE, USA) was condensed and polymerized to the surface-treated specimens. The shear bond strength was tested using a universal testing machine at a crosshead speed of 5 mm/min. The surface morphology and wettability after surface treatments were examined with field emission scanning electron (FE-SEM), three dimensional optical microscopy (3D-OM), and a water contact angle goniometer. Increased surface irregularities were observed in the surface-treated speciments of Groups I, II, and III. However, the specimens treated with Ceramic Bond (Group IV) showed a smoother surface than diamond bur-treated specimens. The highest wettability values were found after Cojet sand treatment in Group I and other surface treatment methods also showed better surface wettability than the polished or diamond bur-treated surfaces. There were no significant differences in the shear bond strengths between the four groups (P > 0.05). The chemical surface treatments of zirconia veering ceramic with silane coupling agents are more practical and have bond strength similar to those of surface roughening methods using acid etching or airborne particles. The current study indicates that the porcelain repair systems used for conventional veneering ceramics could be applied effectively to zirconia veneering ceramics.
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Document Type: Research Article
Publication date: January 1, 2015
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