Microleakage of self- adhesive resin cements compared withresin cements containingetch&r inse adhesives Dr. Heshmat H.,1 Dr. Hoorizadganjkar M .,1 Dr. Zeinali S .,2 Aghajani F . 3 1 Assistant P rofessor, Department of Restorative Dentistry , School of Dentistry, Islamic Azad University . Tehran, Iran . 2 Dentist . 3 Member of Dental Materials Research Center, School of Dentistry, Tehran University of Medical Sciences . Tehran, Iran . (Received 26 July, 2011 Accepted 17 March, 2012) Abstract Background and Aim : Current self-adhesive resin cements have become popular for esthetic restorations. The purpose of this study was to compare the microleakage of 2 self-adhesive resin cements and 2 etch and rinse versions of the same brands . Materials and Methods : Forty human third molars were randomly assigned to 4 experimental groups: 1-Rely X Unicem, 2- Rely X ARC+ Acid etch 37% + Single Bond ,3- Nexus 3 Acid etch 37% + Optibond Solo, and 4- Maxcem Elite. Microleakage of the specimens were then measured with a four point scoring system at both the cervical &occlusal areas, with the aid of a stereomicroscope. Microleakage scores were compared using Kruskul-Wallis analysis, followed by relative Dunn test . Results : The microleakage of Rely X Unicem and Nexus 3 were significantly less in the occlusal region (P<0.05), whereas in the cervical area there was no significant difference in microleakage between Rely X Unicem and Rely X ARC (P= 0.0087). The microleakage of Nexus 3 was significantly less than that of Rely X Unicem.Maxcem Elite showed the highestlevel of microleakage (P<0.05 ). Conclusion : Microleakage of both cements using etch & rinse adhesive systems were significantly lower in comparison withtheir self- etch counterparts both at the cervical &occlusal areas. (P< 0.05 ) Key words: Microleakage - Self-Adhesive Resin Cement - Dentin Adhesion - Enamel adhesion Corresponding Author: Dr. Heshmat H . , Assistant P rofessor, Department of Restorative Dentistry , School of Dentistry, Islamic Azad University . Tehran, Iran . e.mail: h_heshmat@yahoo.com |
