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Year : 2020  |  Volume : 9  |  Issue : 2  |  Page : 69-72

Evaluation of apical debris extrusion during endodontic retreatment by different systems

Department of Clinical Dentistry, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Correspondence Address:
Dr. Patrícia de Andrade Risso
Prof. Rodolpho Paulo Rocco, 325, 2ndFloor, Cidade Universitária, Rio de Janeiro, RJ
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ejgd.ejgd_114_19

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Aim: This study sought to evaluate the amount of apical debris extrusion during the removal of filling material (RFM) performed by the ProTaper-Retreatment (ProTaper-R), Mtwo-Retreatment (Mtwo-R), Reciproc, and hand files.Materials and Methods: Sixty lower premolars were prepared using the ProTaper Universal system and filled with thermoplastic technique. Subsequently, the samples were randomly divided into four groups (n= 15) according to the system used for the removal of the filling material: Mtwo-R (R25/.05); ProTaper-R (D1, D2, and D3); Reciproc (R25); and hand file (type K and Hedstroem stainless steel files). The apical debris extrusion was evaluated before and after the RFM from the root canal by weighing Eppendorf tubes on a high-precision balance. Statistical analysis was performed using the ANOVA test followed by the Tukey's test (P< 0.05). Results: All of the systems produced apical debris extrusion; however, the Mtwo-R group demonstrated significantly more extrusion as compared with the ProTaper-R and Reciproc groups (P< 0.05). There was no statistically significant difference between the Reciproc, ProTaper-R, and hand file groups (P > 0.05). Conclusions: The Mtwo-R group produced significantly more extrusion than did the ProTaper-R and Reciproc groups. There was no difference between the Reciproc, ProTaper-R, and hand file groups.

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