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

• Published in: Iranian endodontic journal Vol. 6; no. 2; pp. 69 - 73
• Main Authors: Dadresanfar, Bahareh, Mehrvarzfar, Payman, Saghiri, Mohammad Ali, Ghafari, Sedigh, Khalilak, Zohreh, Vatanpour, Mehdi
• Format: Journal Article
• Language: English
• Published: Iran Iranian Center for Endodontic Research 01.01.2011; Iranian Association of Endodontists; Iranian Center for Endodontic Research
• Subjects: Gutta-percha; Mtwo R; Original; ProTaper D series; Retreatment; SEM; Retreatment; SEM; Protaper D Series; Mtwo R; Gutta-Percha
• ISSN: 1735-7497; 2008-2746

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. 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. 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). Mtwo R seems to be an efficient rotary system for endodontic retreatment of root canal with GP.