Table 5 In vitro studies on root canal morphology (accessory canals, inter-canal communications, apical foramina, deltas) 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) | Accessory Canals (%) | ICCs (%) | Apical Foramina | Deltas (%) | |
|---|---|---|---|---|---|---|---|---|
Central (%) | Lateral (%) | |||||||
Vertucci & Gegauff | 1979 | North America | 400 | 49.5a | 34.2 | 12 | 88 a | 3.2 |
Caliskan et al. | 1995 | Turkey | 100 | 33.3 | 17.7 | 33.3 | 66.7 | 21.6 |
Kartal et al. | 1998 | Turkey | 300 | 26 | 7 | 15.3 | 84.7 | 7.7 |
Sert & Bayirli | 2004 | Turkey | 200 | 33 | 12 | 34 | 76 | 30.7 |
Awawdeh et al. | 2008 | Jordan | 600 | 19.3 | 7 | 60 | 40 | 4.3 |
Weng et al. | 2009 | China | 95 | 51.7 | – | – | – | – |
Present study | – | Yemen | 250 | 52.8 | 34.4 | 84.9 | 15.1 | 13.2 |