Abstract
Abstract: Aims: Different materials can be used during endodontic treatment of teeth as a root canal sealer. Thus, this study was done to evaluate the sealing ability of three different types of root canal sealer in the apical part of canals. Materials and Methods: 50 sound human teeth can instrumented by using a rotary ProTaper nickel-titanium files under crown down technique. The samples was divided randomly into 3 groups (n=10), Additionally two groups were used for controls, first group use Endofill sealer ( PD product dentaires SA,Switzerland), and group two used Tagadseal sealer (technical general United kingdom), third group used AH plus sealer (Dentsply, Switzerland). All teeth were obturated using single cone technique with sealers, then the whole root surface layered with two layer of special type of nail varnish except apical 1 mm, then all teeth were placed into 2 % methylene blue dye liquid for one week at 37o C. After that removed from dye liquid, the nail varnish was removed. The positive controls (n=10) were left unfilled and coated as described earlier. Then the teeth was split longitudinally and each half examined under a stereomicroscope with magnification: 10 X. Then using computer software on the photo taken by a digital camera. Analyzing of data was done by One-Way Anova and Duncan,s Test analysis among the means of microleakage of the three types of sealers. All tests were computed at 5% significance level. Results: show statistically significant difference among groups.
