International endodontic journal
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Comparative Study
A comparative study of root canal preparation using FlexMaster and HERO 642 rotary Ni-Ti instruments.
To compare several parameters of root canal preparation using two different rotary nickel-titanium (Ni-Ti) instruments: FlexMaster (VDW, Munich, Germany) and HERO 642 (Micro-Mega, Besançon, France). ⋯ Both systems respected original root canal curvature well and were safe. Both systems failed to remove debris and smear layer in the majority of the cases.