Microleakage evaluation of Silorane-Based Composites versus Low Shirinkage Methacrylate-Based Composites Dr. Kermanshah H.,1 Dr. Yassini E .,2 Dr. Hoseinifar R ., 3 Dr. Mirzaei M.,4 Dr. Pahlavan A.,5 Dr. Hasani Tabatabaie M.,5 Dr. Arami S.4 1 Member of Dental Research Center and Laser Research and Assistant Professor , Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Science . Tehran, Iran . 2 Professor , Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Science . Tehran, Iran . 3 Member of Dental Diseases Research Center and Assistant Professor , Department of Operative Dentistry, School of Dentistry, Kerman University of Medical Science . Kerman , Iran . 4 Assistant Professor , Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Science . Tehran, Iran. 5 Associate Professor , Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Science . Tehran, Iran (Received 22 May, 2012 Accepted 26 Aug, 2012) Abstract Background and Aim : Determining the best restorative material to decrease microleakage in class V restorations is of great importance in operative dentistry. The aim of this in-vitro study was to evaluate the microleakage of silorane-based composites compared to low shrinkage methacrylate-based composites in class V restorations. Materials and Methods : In this in vitro study, class V cavities were prepared on the buccal and lingual surfaces of 24 human premolars and molars (48 cavities). The specimens were divided into four groups of 6(12 cavities) as follows: group 1 ( LS System Adhesive, Primer & Bond + Filtek P90), group 2 ( Kalore-GC+ Clearfil SE bond ), group 3 ( Clearfil SE bond + Grandio) and group4 ( Clearfil SE bond + Aelite LS Posterior) . All the specimens were thermocycled for 2000 cycles (5-50oC). The teeth were then immersed in 0.5% basic fuchsin dye for 24 hours at 370C, sectioned and observed under stereomicroscope. Data were analyzed using Kruskal-Wallis and Wilcoxon tests at a P<0.05 level of significance . Results : There were no significant differences in microleakage among the four groups at the occlusal margin (P>0.05). But, there were statistically significant differences in microleakage between Silorane and Aelite at the gingival margin (P<0.05). Statistically significant differences were also found in microleakage between occlusal and gingival margins (except for Kalore and Silorane) (P>0.05 ) Conclusion : Silorane was not superior to the conventional low shrinkage methacrylate-based composites except for Aelite in terms of microleakage . Key words: Composite resins , methacrylate , microleakage Corresponding Author: Dr. Hoseinifar R . , Member of Dental Research Center and Assistant Professor , Department of Operative Dentistry, School of Dentistry , Kerman University of Medical Science . Kerman , Iran . e.mail: r_hoseiniffar@yahoo.com |
