Table 2.
Angle of coronal root canal curvature in the axial direction (degrees).
| n | Mean | SD | MIN | MAX | M | |
|---|---|---|---|---|---|---|
| 3 Canals (2 roots) | ||||||
| MB | 65 | 22.62 | 4.49 | 12.84 | 30.92 | 22.69 |
| ML | 65 | 24.92 | 4.30 | 9.69 | 37.09 | 24.93 |
| D | 65 | 10.53 | 3.81 | 2.16 | 18.07 | 11.14 |
| 4 Canals (2 roots) | ||||||
| MB | 25 | 22.50 | 4.27 | 15.22 | 33.54 | 22.74 |
| ML | 25 | 24.69 | 4.14 | 15.67 | 33.20 | 23.51 |
| DB | 25 | 12.16 | 4.19 | 2.89 | 17.58 | 13.35 |
| DL | 25 | 16.20 | 6.15 | 4.83 | 29.82 | 18.08 |
| 4 Canals (3 roots) | ||||||
| MB | 46 | 24.53 | 4.27 | 16.31 | 34.19 | 24.59 |
| ML | 46 | 26.54 | 3.97 | 16.98 | 37.94 | 26.21 |
| DB | 46 | 16.57 | 3.63 | 10.57 | 25.62 | 16.24 |
| DL | 46 | 38.72 | 7.23 | 25.34 | 54.92 | 37.90 |
D, single distal canal in the distal root; DB, distobuccal; DL, distolingual; MB, mesiobuccal; ML, mesiolingual; SD, standard deviation; MIN, minimum value; MAX, maximum value; M, median.