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http://dx.doi.org/10.5395/JKACD.2010.35.6.486

Effect of 2% chlorhexidine application on microtensile bond strength of resin composite to dentin using one-step self-etch adhesives  

Jang, Soon-Ham (Department of Conservative Dentistry, Pusan National University School of Dentistry)
Hur, Bock (Department of Conservative Dentistry, Pusan National University School of Dentistry)
Kim, Hyeon-Cheol (Department of Conservative Dentistry, Pusan National University School of Dentistry)
Kwon, Yong-Hun (Department of Dental Materials, Pusan National University School of Dentistry)
Park, Jeong-Kil (Department of Conservative Dentistry, Pusan National University School of Dentistry)
Publication Information
Restorative Dentistry and Endodontics / v.35, no.6, 2010 , pp. 486-491 More about this Journal
Abstract
Objectives: This study examined the effect of 2% chlorhexidine on the ${\mu}TBS$ of a direct composite restoration using one-step self-etch adhesives on human dentin. Materials and Methods: Twenty-four extracted permanent molars were used. The teeth were assigned randomly to six groups (n = 10), according to the adhesive system and application of chlorhexidine. With or without the application of chlorhexidine, each adhesive system was applied to the dentin surface. After the bonding procedure, light-cure composite resin buildups were produced. The restored teeth were stored in distilled water at room temperature for 24 hours, and then cut and glued to the jig of the microtensile testing machine. A tensile load was applied until the specimen failed. The failure mode was examined using an operating microscope. The data was analyzed statistically using one-way ANOVA, Student's t-test (p < 0.05) and Scheffet's test. Results: Regardless of the application of chlorhexidine, the Clearfil $S^3$ Bond showed the highest ${\mu}TBS$, followed by G-Bond and Xeno V. Adhesive failure was the main failure mode of the dentin bonding agents tested with some samples showing cohesive failure. Conclusions: The application of 2% chlorhexidine did not affect the ${\mu}TBS$ of the resin composite to the dentin using a one-step self-etch adhesive.
Keywords
Chlorhexidine; Microtensile bond strength; One-step self-etch adhesive;
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