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Table 3 Prevalence of C-shaped classes according to Fan et al. (18) in different root thirds

From: Root and canal morphology of mandibular second molars in an Egyptian subpopulation: a cone-beam computed tomography study

Section

C1A

C2AB

C3aBC

C3bC

C4C

Total

χ2

p-value

Coronal

n(%)

20(44.4%)

12(26.7%)

4(8.9%)

7(15.6%)

2(4.4%)

45(100.0%)

52.59

 < 0.001*

Middle

n(%)

8(17.8%)

11(24.4%)

7(15.6%)

13(28.9%)

6(13.3%)

45(100.0%)

Apical

n(%)

1(2.2%)

0(0.0%)

5(11.1%)

28(62.2%)

11(24.4%)

45(100.0%)

  1. Groups with different superscript letters within the heading row are significantly different; *significant (p < 0.05)
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BMC Oral Health

ISSN: 1472-6831

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