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Table 3 Frequency of distribution of root canal configurations in mandibular first molars according to sex

From: Cone-beam computed tomography analysis of root canal morphology in mandibular first molars in a Chinese population: a clinical study

  

Type I

Type II

Type III

Type IV

Type V

Type VI

Type VII

Type VIII +

Root

Sex

1-1

2-1

1-2-1

2-2

1-2

2-1-2

1-2-1-2

3-

Mesial

F (469)

23 (4.9%)

69 (14.7%)

2 (0.4%)

357 (76.1%)

9 (1.9%)

1 (0.2%)

8 (1.7%)

M (430)

4 (0.9%)

80 (18.6%)

1 (0.2%)

333 (77.4%)

3 (0.7%)

9 (2.1%)

T (899)

27 (3.0%)

149 (16.6%)

3 (0.3%)

690 (76.8%)

12 (1.3%)

1 (0.1%)

17 (1.9%)

Distal

F (344)

260 (75.6%)

26 (7.6%)

4 (1.2%)

30 (8.7%)

24 (7.0%)

M (330)

275 (83.3%)

17 (5.2%)

1 (0.3%)

23 (7.0%)

12 (3.6%)

2 (0.6%)

T (674)

535 (79.4%)

43 (6.4%)

5 (0.7%)

53 (7.9%)

36 (5.3%)

2 (0.3%)

Distobuccal

F (125)

123 (98.4%)

2 (1.6%)

M (100)

99 (99%)

1 (1%)

T (225)

222 (98.7%)

3 (1.3%)

Distolingual

F (125)

125 (100%)

M (100)

100 (100%)

T (225)

225 (100%)