Aim: The aim of this study was to measure the apical debris extrusion during retreatment using three different techniques. Method: Forty five single rooted anterior teeth were selected for the study that were decoronated and were root canal treated. Access was restored with composite resin. Teeth were placed in eppendorf tubes and sealed. They were weighed before and after retreatment. Teeth were then subjected to retreatment and they were divided into 3 groups Group I: retreatment using Hfiles, Group II: retreatment using protaper retreatment files, Group III: retreatment using reciproc files. Results: The results were subjected to Analysis of variance (ANOVA) to find the significance of study parameters. The amount of apical debris extrusion was found to be least in Group III. There was no clinical significance between Group I and Group II. There was a statistically significant difference between Group III in comparison to Group I and II. Conclusion: Present study showed that the amount of apical debris extrusion was least for reciprocating engine driven technique of retreatment when compared to the hand file (H-file) and rotary technique for retreatment endodontics.
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