Table 4 Frequency distribution of the improved Vertucci’s classifications of middle mesial canal of mandibular first molars in a Southern Chinese subpopulation
Classification | Improved Vertucci’s classification | Number of specimens | Incidence (%) |
|---|---|---|---|
Type I | Type VIII | 12 | 8.23 |
Type II | 3-2 | 85 | 53.80 |
Type III | 2-3-1 | 4 | 2.53 |
Type IV | 2-3-2 | 40 | 25.32 |
Type V | 2-3-2-1 | 5 | 3.16 |
Type VI | 1-2-3-2 | 2 | 1.27 |
Type VII | 1-3-4-1 | 3 | 1.90 |
Type VIII | 3-2-1* | 3 | 1.90 |
Type IX | 3-2-3-2* | 2 | 1.27 |
Type X | 3-4-3-2-1* | 1 | 0.63 |