Table 4 In vitro studies on root canal configuration of the permanent first maxillary premolar
From: Root form and canal morphology of maxillary first premolars of a Yemeni population
Author | Year | Population | Sample (n) | Vertucci’s root canal configuration (%) | Additional types (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
I | II | III | IV | V | VI | VII | VIII | |||||
Vertucci & Gegauff | 1979 | North America | 400 | 8 | 18 | – | 62 | 7 | – | – | 5 | – |
Caliskan et al. | 1995 | Turkey | 100 | 3.9 | 5.9 | – | 78.4 | 5.9 | 5.9 | – | – | – |
Kartal et al. | 1998 | Turkey | 300 | 8.7 | 1 | – | 71.3 | 14.7 | 2.3 | 0.3 | 1.3 | – |
Chaparro et al. | 1999 | Andalusia | 150 | 1.3 | 37.3 | – | 58 | – | – | – | 3.3 | – |
Sert & Bayirli | 2004 | Turkey | 200 | 10.5 | 12.5 | 5.5 | 61.5 | 3.5 | 1 | – | 3 | – |
Lipski et al. | 2005 | Poland | 142 | 2.1 | 6.3 | – | 82.4 | – | – | – | 9.2 | – |
Peirisa | 2008 | Sri Lanka | 153 | 1.3 | 16.3 | 2 | 64 | 5.9 | 5.9 | 0.7 | – | 3.9 |
2008 | Japan | 81 | 4.9 | 29.6 | 2.5 | 45.7 | 2.5 | 8.6 | – | – | 6.2 | |
Atieh | 2008 | Saudia Arabia | 246 | 8.9 | 26.8 | – | 63 | – | – | – | 1.2 | – |
Awawdeh et al. | 2008 | Jordan | 600 | 3.3 | 10.2 | 0.3 | 79.7 | 2 | 2.3 | – | 1.5 | 0.7 |
Weng et al. | 2009 | China | 95 | 6.3 | 22.1 | 3.2 | 64.2 | 3.2 | 1 | – | – | – |
Present study | – | Yemen | 250 | 13.2 | 4.4 | 8.0 | 55.6 | 5.6 | 1.6 | 3.6 | 0.8 | 7.2 |