Table 1.
Root canal morphology of maxillary premolars according to Vertucci's classification among the enrolled elderly individuals
| Items | Vertucci’s classification | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | V | VI | VII | VIII | Others | ||
| Maxillary first premolars | ||||||||||
| Single-rooted teeth | 21 (6.6) | 150 (47.3) | – | 78 (24.6) | 7 (2.2) | 47 (14.8) | 1 (0.3) | – | 13 (4.1) | 317 |
| Two-rooted teeth | – | – | – | 193 (98.0) | – | – | – | 4 (0.03) | – | 197 |
| Three-rooted teeth | – | – | – | – | – | – | – | 6 (85.7) | 1 (14.3) | 7 |
| Total | 21 | 150 | – | 271 | 7 | 47 | 1 | 10 | 14 | 521 |
| Maxillary second premolars | ||||||||||
| Single-rooted teeth | 157 (32.8) | 207 (43.3) | 3 (0.6) | 31 (6.5) | 16 (3.4) | 47 (29.8) | 3 (0.6) | – | 14 (2.9) | 478 |
| Two-rooted teeth | – | – | – | 38 (97.4) | – | – | – | 1 (2.6) | – | 39 |
| Total | 157 | 207 | 3 | 69 | 16 | 47 | 3 | 1 | 14 | 517 |
Values were shown as n or n (%). –: Not applicable.