Asmaa A.Desouky, Maged M. Negm And Magdy M.M. Ali,

ABSTRACT
Objectives The Aim Of This Article Is To Evaluate The Sealability Of Experimental Nanosealers (nano Calcium Hydroxide And Nano Bioactive Glass) And To Compare It With The Commercial Zinc Oxide Eugenol Sealer. Methodology Sixty Single-root Human Mandibular Premolars Were Selected And Instrumented With Protaper Ni-Ti Rotary File And The Final File Size Was Up To # F4/.06. They Were Then Randomly Allocated Into 3 Groups, And All Samples Were Filled With Single Cone Gutta-percha (#40/06) And One Of The Tested Sealers. All Specimens Were Tested By Dye Penetration Test To Evaluate The Sealability Of Newly Introduced Nanosealers. Results Significant Improvement Shown By The Presented Study Suggests That Nano Calcium Hydroxide Sealer Showed Significantly Less Dye Leakage Than Nano Bioactive Glass Sealer And Zinc Oxide Eugenol Sealer. Conclusions The Results Of This Study Showed That The Synthesized Nano-powder Sealers Are Suitable For Use In Root Canal Therapy To Prevent Leakage.