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Table 1 Angle and radius of canal curvature of the 48 teeth

From: Less extrusion debris during the retreatment of curved canals using twisted files with higher rotational speeds: an ex vivo study

 

Angle

Radius

Group

Mean angle (degree)

SD

Range

Mean radius (mm)

SD

Range

A(n = 12)

28.95

3.15

25.1–35.0

6.82

2.17

3.0–9.8

B(n = 12)

34.90

29.3

25.1–34.9

6.86

1.83

3.7–9.8

C(n = 12)

31.05

2.73

27.6–35.0

7.25

2.15

3.9–10.0

D(n = 12)

29.43

2.99

25.0–34.0

7.21

2.21

3.2–10.0

  1. Group A: Twisted Files at 500 rpm; Group B: Twisted Files at 1000 rpm; Group C: Twisted Files at 1500 rpm; Group D: manual technique
  2. SD standard deviation