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Comparison of Time Required by D-RaCe, R-Endo and Mtwo Instruments for Retreatment: An in vitro Study
Akansha Garg1, Ajay Nagpal2, Shashit Shetty3
1Post graduate Student, Department of Conservative Dentistry & Endodontics, Kanti Devi Dental College and Hospital , Mathura, Uttar Pradesh, India .
Introduction:
To evaluate and compare the amount of time required by three rotary NiTi instruments in removing gutta-percha from root canal during retreatment with hand file as control.
Materials And Methods:
Eighty human mandibular premolars with single straight root canals were prepared and obturated by cold lateral condensation with gutta-percha and AH Plus sealer. After two weeks, the 80 teeth were divided into one control group and 3 retreatment groups (n = 20 each). Gutta-percha was removed using H-files, the D-RaCe, or the Mtwo or the R-Endo retreatment systems. Retreatment time was calculated using stopwatch.
Results:
D-RaCe and Mtwo required significantly less time than R-Endo and hand file. Hand file took maximum time, which was significantly slower than all groups. However, D-RaCe and Mtwo retreatment time was statistically insignificant.
Conclusion:
D-RaCe and Mtwo remove gutta-percha faster than R-Endo and Hand files.
