Research Article
Mechanical and Metallurgical Properties of Various Nickel-Titanium Rotary Instruments
Table 2
Mean values (standard deviation) of elastic modulus, maximum torque, and angular displacement at fracture from the torsional fracture test.
| | NiTi alloy | Conventional alloy | M-wire | CM wire | R-phase | | Product | ProFile | K3 | One Shape | ProTaper NEXT | Reciproc | WaveOne | HyFlex CM | TF |
| | EM (N·cm/θ) | 0.92 (0.14) | 0.72 (0.12) | 0.68 (0.08) | 0.53 (0.07) | 0.57 (0.06) | 0.50 (0.05) | 0.21 (0.04) | 0.23 (0.04) | | Maximum torque (N·cm) | 2.54 (0.31) | 2.76 (0.3) | 2.16 (0.23) | 2.37 (0.21) | 2.7 (0.17) | 2.19 (0.22) | 1.66 (0.15) | 1.19 (0.18) | | ADF (°) | 602 (83.4) | 711 (57.5) | 479 (40.7) | 347 (26.6) | 391 (37.4) | 414 (39.5) | 782 (47.8) | 951 (76.1) |
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EM, elastic modulus; ADF, angular displacement at fracture. Different superscript letters in the same row indicate significant differences ().
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