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Table 1 The incidence (%) of differences between the four methods and the AL measurements

From: Endodontic length measurements using 3D Endo, cone-beam computed tomography, and electronic apex locator

Groups

Shorter than AL N(%)

Equal to AL N(%)

Longer than AL N(%)

± 0.5 mm(%)

> 0.5 mm

≤ 0.5 mm

≤ 0.5 mm

> 0.5 mm

3D-PL–AL

13 (4.3)

85 (28.1)

19 (6.3)

157 (52.0)

28 (9.3)

86.4a

3D-CL–AL

14 (4.6)

133 (44.0)

14 (4.6)

133 (44.0)

8 (2.6)

92.8b

Romexis Viewer–AL

56 (18.5)

73 (24.2)

0 (0.0)

121 (40.1)

52 (17.2)

64.3c

ProPex II–AL

0 (0.0)

299 (99.0)

3 (1.0)

0 (0.0)

0 (0.0)

100d

  1. a,b,c,dDifferent superscript letters showed that there were significant differences at the level of 0.05 (P < 0.05), Fisher’s Exact Test