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Efficacy of two rotary systems in removing gutta-percha and sealer from the root canal walls
Bahareh Dadresanfar1, Payman Mehrvarzfar, Mohammad Ali Saghiri
1Department of Endodontics, Dental School, Islamic Azad University of Medical sciences, Tehran, Iran.
Introduction:
The aim of this in vitro study was to compare the efficacy of two retreatment rotary systems in removal of gutta-percha (GP) and sealer from the root canal walls with and without use of solvent.
Materials And Methods:
Sixty single-canalled distal roots of mandibular molars were prepared and root filled with gutta-percha and AH26. Each canal was randomly allocated to receive one of the retreatment techniques, Mtwo R or ProTaper. The groups were further divided into two subgroups: with or without the use of solvent. The cleanliness of canal walls was determined by stereomicroscope and scanning electron microscopy.
Results:
The results showed that Mtwo R without the use of solvent was more efficient in material removal compared to ProTaper D (P<0.05). Most remnants were found in the apical third of the canals (P<0.05).
Conclusion:
Mtwo R seems to be an efficient rotary system for endodontic retreatment of root canal with GP.
