From: Root form and canal morphology of maxillary first premolars of a Yemeni population
Features | Single-rooted n (%) | Double-rooted n (%) | Three-rooted n (%) | Total n (%) | |||
---|---|---|---|---|---|---|---|
B | P | MB | DB | P | |||
Apical foramen location | |||||||
Centrally in the apex | 104 (75.9%) | 101 (91.0%) | 99 (89.2%) | 2 (100%) | 2 (100%) | 2 (100%) | 310 (84.9%) |
Laterally | 17 (12.4%) | 10 (9.0%) | 12 (10.8%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 39 (10.7%) |
Both | 16 (11.7%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 16 (4.4%) |
No. of apical foramina | |||||||
One | 61 (44.5%) | 106 (95.5%) | 110 (99.1%) | 2 (100%) | 2 (100%) | 2 (100%) | 283 (77.5%) |
Two | 66 (48.2%) | 5 (4.5%) | 1 (0.9%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 72 (19.7%) |
Three | 10 (7.3%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 10 (2.8%) |
Apical deltas | |||||||
Apical delta present | 29 (21.2%) | 3 (2.7%) | 1 (0.9%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 33 (13.2%) |
Apical delta absent | 108 (78.8%) | 108 (97.3%) | 110 (99.1%) | 2 (100%) | 2 (100%) | 2 (100%) | 332 (86.8%) |