Aim of the study: Assessing the relationship between one curve, edge x 7 and AF Fanta files use in curved canals and the quantity of apically extruded debris.

Materials and Methods: 60 curved mesial roots of lower molars with 20-30-degree curvature were selected for this study, Group I: AF™ R3 Blue

Group II: Edge file x7 Group III: one curve system

The analysis of variance (ANOVA) and the fairly significant difference (HSD) tests were used to assess the statistical significance of the variation in debris levels across the groups under investigation, using a significance level of 0.05.

Results: The results revealed that all tested groups had produced apical debris in different amounts.

Conclusions: Under the purview of the present investigation, apical debris was produced in all tested groups. The one curve produced less amount of debris than other tested groups. AF™ R3 Bluefile produced the most amount of apical debris.