Skip to main content

Table 1 Descriptive data of the torque at failure and angular deflection in the tested systems

From: Torsional resistance of three ProTaper rotary systems

  Surface area at D3 (mm2) Torque at failure (gcm) Angular deflection (degree)
Mean ± SD Median Range Mean ± SD Median Range
PTU S1 0.022 68.8 ± 25.1 77.6af 25.5–101.2 347.9 ± 37.6 355aeg 270–420
S2 0.024 112.5 ± 30.5 108.6b 60.6–182.2 367 ± 48.5 365af 290–495
F1 0.048 100.6 ± 36.4 93.9abg 63.3–169.8 380.3 ± 48.1 375bf 295–480
F2 0.121 141.7 ± 37.6 136.3c 90.82–235.5 346.7 ± 56.6 350aeg 275–470
F3 0.149 196.2 ± 20.9 189.8d 168.4–250.8 559 ± 62.4 540c 450–690
PTG S1 0.022 43.4 ± 14.9 41.6e 22.2–80 361.7 ± 53.1 370abdef 280–440
S2 0.024 73.7 ± 33.3 66.3f 37.4–179.0 331.0 ± 39.9 335e 260–385
F1 0.048 94 ± 23.1 91.4b 37.8–129.4 393.2 ± 60.6 390f 285–495
F2 0.121 117.4 ± 32 115.5bcg 70.6–201.2 371.3 ± 50.4 370fg 280–495
F3 0.149 166.4 ± 17.2 167.4h 135.1–194.5 580.3 ± 61.7 580c 480–670
PTN X1 0.048 59.9 ± 13.5 58.8f 36.7–82.2 291.6 ± 35.8 280h 220–360
X2 .094 95.8 ± 38.9 92ab 44.3–185.1 303.1 ± 32.5 310h 245–355
X3 0.137 115.4 ± 17.6 116.7i 81.4–142.9 303.7 ± 26.3 300h 270–355
  1. Different superscripts indicate statistical significance