Abstract
Aim: The aim of this study was to compare Protaper Universal retreatment files, M-Pro, andTwisted files in retreatment.Methodology: Experimental groups were divided into three group; Group I: Protaper UniversalRetreatment (PTU; Dentsply Maillefer, Ballaigues, Switzerland), Group II: M-Pro (InnovativeMaterial and Devices, ShangHai, China), and Group III: Twisted File (TF; SybronEndo, Orange,CA). Each group was evaluated for time to reach the working length, amount of debris extrudedduring retreatment. Data were then collected, tabulated and statistically analyzed.Results: Statistical analysis showed that TF recorded the least time to reach the working length,while M-Pro showed the highest amount of debris extruded.Conclusion: Under the condition of the current study, TF was faster than M-Pro and PTU toperform gutta-percha removal in the retreatment of teeth. The use of M-Pro in retreatment increasedthe amount of apically extruded debris.
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