Background: Debris is defined as dentine chips and residual vital or necrotic pulp tissue attached to the root canal wall, which in most cases is infected. The apical third of the root canal is the most difficult area to clean due to complex anatomy of this region like deltas, lateral canals, isthmuses and ramifications. Despite the advances made in instruments and instrumentation techniques, the design and the physical limitations of the endodontic instruments can lead to inadequate cleaning of the root canal system. Aim of the study: To compare the cleaning efficacy of root canals with MtwoNiTi rotary files and Hand K-files. Materials and methods: The study was conducted in the Department of Endodontics of Dental institution. For the study, 150 extracted maxillary incisors with completely formed apex, non-carious and with single root canal was selected. The teeth were randomly grouped into three groups, Group 1, Group 2 and Group 3 with 50 teeth in each group. The instrumentation of specimens of Group 1 was done using stainless steel K-files, in Group 2 was done using Mtwo NiTi rotary files and in Group 3 only irrigation was done without any instrumentation (Control group). Results: On comparing the control group with K-files and Mtwo rotary files, we observed that both the techniques were able to remove the ink from the canals. Statistically significant difference was observed in the apical, middle and coronal thirds of root canals on comparing control group with Group 1 and 2. On comparison between Group 1 and 2, non-significant difference was observed in the cleaning efficiency of the canals at apical, middle and coronal region. Conclusion: Within the limitations of the present study, it can be concluded that Mtwo NiTi rotary files and Hand K-files are equally effective in cleaning the root canals.
Keywords: K files, root canals, Mtwo rotary files, hand files.