2014 Volume 57 Issue 6 Pages 502-509
Purpose: The purpose of this study was to determine the shaping ability of the reciprocating nickel-titanium (Ni-Ti) single-file system (Reciproc: VDW, Germany; WaveOne: Dentsply Maillefer, Switzerland) and rotary multiple system (ProTaper: Dentsply Maillefer) by measuring canal transportation.
Methods: One hundred and twenty-six J-shaped canals in resin blocks were used in this experiment. The J-shaped canals had three different apical curvatures (10 (n=42), 20 (n=42), 30 (n=42) degrees) and were randomly classified into 6 groups: Reciproc R25, WaveOne Primary, ProTaper SX-S1-S2-F1-F2, Reciproc R40, WaveOne Large, and ProTaper SX-S1-S2-F1-F2-F3-F4. Each group consisted of a model of 10 (n=7), 20 (n=7), and 30 (n=7) degrees. Canal transportation was assessed by comparing pre-instrumentation and post-instrumentation images under an Olympus SZX16 with digital camera DP71, and the superimposed images were analyzed by WinRoof.
Results: After adjusting for the level and canal wall side, the mean transportation was not significantly different between Reciproc R25, WaveOne Primary, and ProTaper SX-S1-S2-F1-F2 in the final preparation size of ISO#25. A significantly lower deviation was found with Reciproc R40 and WaveOne Large for 10 degrees curvature, by ProTaper SX-S1-S2-F1-F2-F3-F4 for 20 degrees, and by Reciproc R40 for 30 degrees in the final preparation size of ISO#40.
Conclusions: These findings suggest that the reciprocating Ni-Ti single-file Reciproc and WaveOne are suitable systems for preparing curved canals, the same as the rotary multiple system ProTaper.
