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Abstract
The aim of the present study was to study the effect of smear layer removal on the penetrability and sealing ability of a new root canal sealer. results showed that there was a statistically significant difference between the smear layer removal groups and smear layer keeping groups for the three sealers as for their sealing ability while, in the penetrability assessment results showed that there was a statistically significant difference regarding the resin based sealers but not for the bioceramic sealer. Conclusion: It was concluded that both Resin based sealers and Silicone based sealers showed good sealing ability while, Resin based sealers showed better penetration than silicone based sealers