Table 6 Percentage of root number of mandibular third molars in previous studies and the present one.
Study | Nationality | Sample size | 1-root (%) | 2-roots (%) | 3-roots (%) | 4-roots (%) |
|---|---|---|---|---|---|---|
Sidow et al.7 | American | 150 | 17 | 77 | 5 | 1 |
Gulabivala et al.20 | Burmese | 58 | – | 100 | – | – |
Gulabivala et al.36 | Thai | 173 | 12 | 86.80 | 1 | 1 |
Sert et al.6 | Turkish | 370 | 24.80 | 69.20 | 5.40 | 0.27 |
Kuzekanani et al.31 | Iranian | 150 | 21 | 73 | 5.50 | 0.50 |
Ahmad et al.16 | Jordanian | 70 | 12.90 | 74.30 | 8.70 | 4.30 |
Singh et al.32 | Indian | 100 | 15 | 63 | 18 | 4 |
Present study | Jordanian | 639 | 2.50 | 89.70 | 7.30 | 0.47 |
