Evaluation of apical extrusion of debris during retreatment: R-Endo rotary instruments versus hand files

Aim: The aim of this ex vivo study was to compare the amount debris extruded during retreatment using stainless steel hand files (Hedstroem files) and R-Endo Nickel Titanium rotary instruments. Methodology: Eighty single-rooted freshly extracted human mandibular premolars were divided into two groups consisting 40 teeth each. Retreatment performed with (Micro-Mega, Besançon, France) Hedstroem (Dentsply, Maillefer, Ballaigeus, Switzerland). experimental obturated lateral condensation technique. Then, 1.5-mL Eppendorf tubes used collecting material that preparation by subtracting post-instrumentation weight from pre-instrumentation weight. Results: There significant differences in between (p<0.001). apical extrusion group determined be less than instrumentation group. Conclusion: Within limitations study, it might concluded all tested instruments resulted debris. During endodontic procedures, a significantly higher R-Endo. How cite article: Yırgın Akgül N, Haznedaroğlu F, Vardar Ç. Evaluation retreatment: versus files. Int Dent Res 2022;12(2):82-7. https://doi.org/10.5577/intdentres.2022.vol12.no2.6 Linguistic Revision: English manuscript has been checked at least professional editors, both native speakers English.