Research Article
Anatomical Evaluation of Mandibular Molars in a Saudi Population: An In Vivo Cone-Beam Computed Tomography Study
Table 3
Frequency of number of roots, number of canals, and Vertucci type among mandibular 2nd molars N (%).
| | | All teeth (N = 367) | 1-rooted teeth† (fused; N = 31) | 2-rooted teeth (N = 329) | 3-rooted teeth (N = 7) |
| | Number of canals | | 2 canals | 23 (6.3) | 1 (3.2) | 22 (6.6) | — | | 3 canals | 295 (80.4) | 1 (3.2) | 294 (89.4) | — | | 4 canals | 20 (5.4) | — | 13 (4.0) | 7 (100.0) | | Other | 29 (7.9) | 29 (93.6) | — | — |
| | M. Vertucci types | | Type I | 21 (6.2) | — | 21 (6.4) | — | | Type II | 86 (25.4) | — | 84 (25.5) | 2 (28.6) | | Type III | 54 (16) | — | 53 (16.1) | 1 (14.3) | | Type IV | 133 (39.4) | 1 (50.0) | 130 (39.5) | 2 (28.6) | | Type V | 44 (13) | 1 (50.0) | 41 (12.5) | 2 (28.6) |
| | D. Vertucci types | | Type I | 323 (95.6) | 2 (100.0) | 315 (95.7) | 6 (85.7) | | Type II | 3 (0.9) | — | 3 (0.9) | — | | Type III | 3 (0.9) | — | 3 (0.9) | — | | Type IV | — | — | — | — | | Type V | 9 (2.6) | — | 8 (2.4) | 1 (14.3) |
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†29 teeth had joined root canal system; they were excluded from internal morphology analysis. All extra roots had one canal and Vertucci type I. |
