Zincir, Şenay GülKamali, Selin GökerTürkaydin, DilekKeleş, Ali2024-09-252024-09-2520242459-1459https://doi.org/10.33808/clinexphealthsci.1363044https://search.trdizin.gov.tr/tr/yayin/detay/1250857https://hdl.handle.net/20.500.12491/15375Objective: To analyze the remaining EndoSequence BC filling materials and microcrack using micro-computed tomography after retreatment with D-Race and R-Endo systems. Methods: The canals of thirty mandibular single-rooted and single-canal premolar teeth were shaped and obturated with EndoSequence BC point and EndoSequence BC sealer. The samples were assigned into two groups and scanned with micro-computed tomography. Then, the canal filling materials were removed with D-Race and R-Endo systems. After all roots were re-scanned, all images were evaluated for the remaining EndoSequence BC filling materials and microcrack. Also, retreatment time was recorded. Results: The remaining filling material in the R-Endo group was greater than the D-Race group. Both systems caused new cracks formation. However, no significant difference was noticed among them. The D-Race group needed significantly less time in comparison to the R-Endo group. Conclusion: D-Race system was faster and more efficient compared with R-Endo system. D-Race and R-Endo files caused new cracks on the canal walls.eninfo:eu-repo/semantics/openAccessD-RaCeEndosequence BC sealermicrocracksmicro-computed tomographyretreatment.Article10.33808/clinexphealthsci.13630441424634681250857