Background. This study aimed to assess the quantity of apically extruded debris generated during root canal retreatment. Methods. Sixty single-rooted teeth were shaped and obturated with gutta-percha and a resin-based sealer. After three weeks, the samples were prepared for retreatment. They were then divided into four groups (n=15): OneShape+PUI, OneShape+EasyDoActivator, Reciproc+PUI, and Reciproc+EasyDoActivator. Apically extruded debris was gathered and placed in previously weighed Eppendorf tubes. The data were statistically analyzed. Results. With ultrasonic irrigation, debris extrusion was noticeably higher with the OneShape system (P=0.0001). In the Reciproc system, significantly more debris extrusion occurred with sonic activation than with ultrasonic activation (P=0.0001), while no significant difference was observed between irrigation activation systems for the OneShape system (P=0.841). The OneShape+EasyDoActivator group showed significantly higher debris extrusion than Reciproc+PUI (P=0.002). Conclusion. Given the constraints of this study, the Reciproc file system with PUI resulted in less apical debris extrusion, proving safer in terms of periapical extrusion compared to other systems.
Yusufoğlu et al. (Wed,) studied this question.