Table 7.
Configuration of the root canal system in three-rooted mandibular first molars by location and sex (n=41)
| Type | Mesial root | Distobuccal root | Distolingual root | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Male(n) | Female(n) | Subtotal, n(%) | Male(n) | Female(n) | Subtotal, n(%) | Male(n) | Female(n) | Subtotal, n(%) | |
| I | 2 | 1 | 3 (7.3) | 25 | 15 | 40 (97.6) | 26 | 15 | 41 (100)* |
| II | 6 | 4 | 10 (24.4) | 0 | 0 | 0 (0.0) | 0 | 0 | 0 (0.0) |
| III | 0 | 0 | 0 (0.0) | 1 | 0 | 1 (2.4) | 0 | 0 | 0 (0.0) |
| IV | 18 | 10 | 28 (68.3) | 0 | 0 | 0 (0.0) | 0 | 0 | 0 (0.0) |
| Others | 0 | 0 | 0 (0.0) | 0 | 0 | 0 (0.0) | 0 | 0 | 0 (0.0) |
| Subtotal | 26 | 15 | 41 | 26 | 15 | 41 | 26 | 15 | 41 |
*Type I canal was the majority of the distolingual root of the three-rooted mandibular first molars