Table 3 Number of root canals of mandibular permanent molars in a sample of 332 teeth.

From: Root and root canal morphology of mandibular first and second molars in a Jordanian subpopulation: a cross-sectional cone-beam computed tomography study

Tooth

No. of teeth

Number of root canals (%, CI)

One

Two

Three

Four

36

78

0 (0)

0 (0)

60 (76.9, 66.0–85.5)

18 (23.1, 14.5–34.0)

37

81

2 (2.5, 0.3–8.7)

6 (7.4, 2.8–15.4)

69 (85.2, 75.7–91.9)

4 (4.9, 1.4–12.0)

46

81

0 (0)

0 (0)

61 (75.3, 64.5–83.9)

20 (24.7, 16.1–35.5)

47

92

2 (2.2, 0.3–7.8)

3 (3.3, 0.7–9.3)

82 (89.1, 80.8–94.6)

5 (5.4, 1.8–12.1)

Total

332

4 (1.2, 0.3–3.0)

9 (2.7, 1.3–5.1)

272 (81.9, 77.2–86.0)

47 (14.2, 10.7–18.4)

  1. CI confidence interval.
  2. Significant valies are in bold.
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