Tanuj Singh, Dinesh Kumar

ABSTRACT

Background Composite restorative materials represent one of the many successes of modern biomaterials research, since they replace biological tissue in both appearance and function. Hence; the present study was undertaken for assessing and comparing the extent of microleakage among Newer Composite Materials. Materials & methods A total of 30 freshly extracted mandibular premolars were enrolled in the present study. After cavity preparation, all the specimens were divided into three study groups with 10 specimens in each group as follows: Group 1: Conventional microfilled composite was used, Group 2: Nanocomposite was used and Group 3: ORMOCER was used. Drying of all the specimens was done followed by reforestation of cavities with restorative materials according to their respective groups. Sealing of the apices was done using clear self-cure acrylic resin. Tooth specimens were coated with nail varnish. After finishing of this procedure, the tooth specimens of the respective groups were immersed in freshly prepared 50% silver nitrate solution for 4 hours. After sectioning, analysis of the specimens was done under stereomicroscope for analysing the depth of penetration of dye. Results Mean dye penetration among specimens of group 1, group 2 and group 3 was found to be 0.593 mm, 0.268 mm and 0.058 mm respectively. While analysing statistically, it was observed that mean dye penetration was highest for group 1 specimens, while it was lowest for group 3 specimens. However; mean dye penetration of group 2 specimens was in between group 1 and group 3 specimens. Conclusion One of the key roles for the success of restored tooth is the correct choice of restorative material. Hence; ORMOCER had superior marginal sealing ability in comparison to conventional composite and Nanocomposite.