Table 3. Numbers (n) and means (%) of the main (mesiobuccal root and distobuccal root) and accessory apical foramina of the maxillary second molar observed under micro-computed tomography (n=123).
| MB1 |
MB2 |
MB3 |
MB-Acc |
DB |
DB2 |
DB-Acc |
P |
P2 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F | n | % | n | % | n | % | n | % | n | % | n | % | n | % | n | % | n | % |
| 0 | 69 | 56.1 | 121 | 98.4 | 89 | 72.4 | 115 | 93.5 | 113 | 91.9 | 120 | 97.6 | ||||||
| 1 | 122 | 99.2 | 53 | 43.1 | 2 | 1.6 | 18 | 14.6 | 121 | 98.4 | 5 | 4.1 | 7 | 5.7 | 122 | 99.2 | 3 | 2.4 |
| 2 | 1 | 0.8 | 1 | 0.8 | 9 | 7.3 | 2 | 1.6 | 1 | 0.8 | 3 | 2.4 | 1 | 0.8 | ||||
| 3 | 7 | 5.7 | 1 | 0.8 | ||||||||||||||
| 6 | 1 | 0.8 | ||||||||||||||||
Acc, accesory; DB, distobuccal; F, apical foramina; MB, mesiobuccal; P, palatal.
No accessory foramina were observed in the palatal root.