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Number and percentage of accessory canals and inter-canal connections along different thirds of the root.
| Feature | Accessory canals |
Inter-canal connections (isthmi) |
||
|---|---|---|---|---|
| Root third | Number of teeth | Percentage | Number of teeth | Percentage |
| Coronal third | 2 | 0.8 | 0 | 0 |
| Middle third | 11 | 4.4 | 25 | 10 |
| Apical third | 28 | 11.2 | 19 | 7.6 |
| Mixed (more than one third) | 16 | 6.4 | 18 | 7.2 |
| Total | 57 | 22.8 | 62 | 24.8 |
