Table 5 Percentage of root number of maxillary third molar in previous studies and the present one.
Study | Nationality | Sample size | 1-root (%) | 2-roots (%) | 3-roots (%) | 4-roots (%) | 5-roots (%) |
|---|---|---|---|---|---|---|---|
Sidow et al.7 | American | 300 | 15 | 32 | 45 | 7 | Â |
Ng et al.14 | Burmese | 72 | 19.40 | 19.40 | 30.60 | 5.60 | Â |
Alavi et al.5 | Thai | 268 | 1.30 | 7 | 87.70 | 4 | Â |
Sert et al.6 | Turkish | 290 | 35.50 | 28.60 | 34.10 | 1.70 | Â |
Tomaszewska et al.2 | Polish | 78 | 38.50 | – | 61.50 | – |  |
Ahmad et al.16 | Jordanian | 89 | 13.50 | 5.60 | 74.20 | 6.70 | Â |
Present study | Jordanian | 592 | 10.80 | 9.80 | 70 | 9.10 | 0.34 |
