Table 5.
Authors and hypodontia and hyperdontia percentage
| Authors | Place | Years | No. investigated | Years | Hypodontia % | Common missing tooth | Hyper-don’t % |
|---|---|---|---|---|---|---|---|
| Davis | China | 1987 | 1093 | 12 | 6.9 | mandibular incisors | 2.7 |
| Nik-Hussein | Malasia | 1989 | 5.15 | 2.8 | 12,22 | x | |
| Renkerova et al. | Cekoslovakia | 1989 | 4405 | 7.12 | 4 | X | x |
| Lo Muzio et al. | Italia | 1989 | 1529 | 7.14 | 5.2 | second premolar | x |
| Ignelzi et al. | USA | 1989 | 849 | 3.9 | 7.8 | X | 2.4 |
| Jangida Moris | Japan | 1990 | 4009 | 2.29 | 7.8 | second premolar | 3 |
| Dechkunakorn et al. | Tailand | 1990 | 1160 | 6.15 | 8.6 | 12,22 | x |
| Legovid et al. | Yugslavia | 1990 | 2401 | 6.18 | 6.3 | X | 1.4 |
| Amini et al. | Iran | 1999 | 3374 | x | x | X | 0.7 |
| Locht | Danmark | 1980 | 704 | 9.1 | 7.7 | X | 1.7 |
| O’Dowling | Ireland | 1990 | 3056 | X | 11.3 | X | X |
| Al-emran | Saudi Arabia | 1990 | 500 | 13.5-14.5 | 4 | 35,45 | X |
| Lynham | Australia | 1990 | 662 | 16.26 | 6.3 | 15,25 | X |
| Aaskeim Ogard | Norvegia | 1993 | 1953 | 9 | 6.5 | 35,45 | X |
| Sterzik et al. | Germany | 1994 | 3238 | X | 8.1 | X | X |