Retreatability of Bioceramic Sealers Uesd with Single Cone Obturation: Sem Assessment

  Aim: The aim of this study is to evaluate the retreatability bioceramic sealers (Endosequence BC, Totalfill MTA-Fillapex) used with single cone obturation technique. Materials and methods: Root canal forty rooted human mandibular premolar teeth were prepared ProTaper Next rotary system up X3 obturated technique (n=10) using endosequence BC (A), Totallfill (B), MTA-Fillapex (C) Zinc oxide (D) sealer, after two weeks, all samples retreated Universal Retreatment files. regaining working length apical patency was evaluated. All longitudinally sectioned assessed by Scanning electron microscope residual filling materials data statistically analyzed. Results: least amount found in group D-ZOE (1.43) followed C-MTA-Fillapex (1.50) B-Totalfill (1.57) respectively. While, greater A-Endosequence (1.87). Furthermore, re-gained 100% samples. Whereas, regained A, B, C D 90%, 80%, 90%,100% Conclusion: None root could be completely removed. observed than ZOE sealer. there loss some cases