Related Experiment Video
Updated: Apr 15, 2026
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
Published on: October 11, 2024
The self-adjusting file instrumentation results in less debris extrusion apically when compared to WaveOne and
Ajinkya M Pawar1, Mansing G Pawar2, Zvi Metzger3
1Department of Conservative Dentistry and Endodontics, Dnyandeo Yashwantrao Patil Dental School and Hospital, Lohegaon, Pune, India.
Aim:
The present ex vivo study aimed to evaluate the debris extrusion after instrumenting the root canals by three different files systems.
Materials And Methods:
Sixty extracted human mandibular premolars with single canals were selected and randomly divided into three groups (n = 20) for instrumentation with three different files. Group 1: WaveOne (primary) single reciprocating file (WO; Dentsply Maillefer, Ballaigues, Switzerland) (25/08), Group 2: Self-adjusting file (SAF; ReDent-Nova, Ra'anana, Israel) (1.5 mm), and Group 3: ProTaper NEXT X1 and X2 (PTN; Dentsply Tulsa Dental, Tulsa, OK) (25/06). Debris extruding by instrumentation were collected into pre-weighed Eppendorf tubes. These tubes were then stored in an incubator at 70°C for 5 days. The tubes were then weighed to obtain the final weight, with the extruded debris. Statistical analysis for the debris extruded apically was performed using one-way analysis of variance and post hoc Tukey's test.
Results:
The statistical analysis showed a significant difference between all the three groups tested (P < 0.01). The following post hoc Tukey's test confirmed that Group 2 (SAF) exhibited significantly least (P < 0.01) debris extrusion between the three groups tested.
Conclusions:
The SAF resulted in significantly less extrusion of debris when compared to reciprocating WO and rotary PTN.
