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Influence of different reciprocating systems on the apical extrusion of debris in flat-oval canals


Dental pulp cavity
Root canal preparation
Tooth apex

How to Cite

Marchiori M, Corrêa AMY, Tomazinho FSF, Gabardo MCL, Mattos NHR, Fariniuk LF, et al. Influence of different reciprocating systems on the apical extrusion of debris in flat-oval canals. Braz. J. Oral Sci. [Internet]. 2021 Jun. 11 [cited 2024 Apr. 16];20(00):e213781. Available from:


Aim: To evaluate the apical extrusion of debris in flat-oval canals, using three reciprocating systems at two different working lengths (WL), 0 mm and 1 mm from the apical foramen. Methods: Ninety mandibular incisors were randomly divided into three groups based on the systems: WaveOne Gold #25.07 (WOG), ProDesign R #25.06 (PDR), and X1 Blue #25.06 (X1B). Extruded debris were collected and dried in pre-weighed Eppendorf tubes. Three consecutive weighings were performed for each tube, and the mean was calculated. If the assumptions of normality and homogeneity of variance were not met, the Kruskal-Wallis test was used to analyze the amount of extruded debris between groups with the same WL, and the Mann-Whitney U test was used for comparison within groups for each WL. Results: All groups had extruded debris, with higher median values occurring at 1 mm. No significant difference regarding the amount of debris extrusion was observed at 0 mm (p>0.05) and 1 mm (p>0.05) between groups. However, within the groups, at different WL, there was greater extrusion at 1 mm (p<0.05), with PDR differing significantly from the other systems (p<0.05). Conclusion: The extrusion of debris occurred regardless of the group, with higher values at 1 mm. However, using PDR at 1 mm from the apical foramen showed the highest values of extrusion.


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