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Efficacy of two rotary systems in removing gutta-percha and sealer from the root canal walls

Bahareh Dadresanfar, Payman Mehrvarzfar, Mohammad Ali Saghiri, Sedigh Ghafari, Zohreh Khalilak, Mehdi Vatanpour
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Abstract

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 & 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.


Keywords

Gutta-percha, Mtwo R, ProTaper D series, Retreatment, SEM.



DOI: https://doi.org/10.22037/iej.v6i2.2094

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