Table 4 Frequency distribution of root canal configurations in distal root for 733 two-rooted mandibular second molars
Canal configuration N (%) | Gender | Age | Total of all | |||||
|---|---|---|---|---|---|---|---|---|
Female (n = 321) | Male (n = 412) | 15–24 (n = 232) | 25–34 (n = 146) | 35–44 (n = 116) | 45–54 (n = 152) | ≥ 55 (n = 87) | 733 | |
Type I, oval canala | 138 (42.9) | 187 (45.3) | 66 (28.4)§ | 51 (34.9)§ | 52 (44.8)§ | 95 (62.5)§ | 61 (70.1)§ | 325 (44.3) |
Type I, flat canalb | 87 (27.1) | 135 (32.7) | 104(44.8)§§ | 49 (33.5)§§ | 36 (31.0)§§ | 27 (17.7)§§ | 6 (6.89)§§ | 222 (30.3) |
Type I, expand canalc | 79 (24.6) | 75 (18.2) | 52 (22.4) | 39 (26.7) | 22 (18.9) | 26 (17.1) | 15 (17.2) | 154 (21) |
Type I, Total | 304(94.7) | 397 (96.3) | 222(95.6) | 139(95.2) | 110(94.8) | 148(97.3) | 82(94.2) | 701 (95.6) |
Type II, 2–1 canal | - | 5 (1.21) | - | 4 (2.73) | - | 1 (0.65) | - | 5 (0.68) |
Type III,1–2-1 cnal | 7 (2.18) | 5 (1.21) | 5 (2.15) | - | 4 (3.44) | - | 3 (3.44) | 12 (1.6) |
Type V,1–2 canal | 10 (3.11) | 5 (1.21) | 5 (2.15) | 3 (2.1) | 2 (1.72) | 3 (1.97) | 2 (2.29) | 15 (2) |