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Background: The present study aimed to compare the influence of different heat-treated glide path systems on apical debris extrusion and the time consumed while preparing curved root canals with an EdgeOne Fire™ file.
Method: Forty-five extracted mandibular first molar teeth with curved mesial roots were selected for this study. The mesial roots of the selected teeth were removed at the cementoenamel junction. Digital radiographic images obtained were evaluated for the curvature of the mesial root canals. Specimens were randomly divided into three experimental groups according to the root canal preparation (n = 15): Debris extruded apically during instrumentation was collected into pre-weighed Eppendorf tubes. The tubes placed in an incubator at 50°C and stored for five days. The weight of the dry extruded debris was measured by subtracting the pre-instrumentation and post-instrumentation weight of the Eppendorf tubes for each group. The total time consumed was recorded for the canal enlargement with glide path and instrumentation of each root canal. The data analyzed using one-way variance (ANOVA) analysis and Tukey’s post hoc tests.
Results: A statistically significant difference was observed between the WaveOne® Gold Glider group and the without glide path group (P<0.05). There was no significant difference between the WaveOne® Gold Glider group and EdgeGlidePath™ group and between the EdgeGlidePath™ group and no glide path group (P>0.05). Moreover, with regard to the time consumed for preparation,there was no significant difference between the groups (P>0.05).
Conclusion: All experimental groups caused apical debris extrusion. Glide path preparation using instruments either with reciprocation or continuous rotation showed no difference in debris extrusion, nor did it affect the time consumed while preparing curved root canals.