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| Condition | All teeth (n) | Teeth with apical periodontitis (n) | Apical periodontitis prevalence (%) |
| Healthy | 3419 | 6 | 0.2 |
| Remaining root | 62 | 19 | 30.7 |
| Restored with no root filling | 1689 | 20 | 1.2 |
| Restored with adequate root filling | 298 | 57 | 19.1 |
| Restored with inadequate root filling (underfilled) | 110 | 86 | 78.1 |
| Restored with inadequate root filling (overfilled) | 7 | 4 | 57.1 |
| Total | 5585 | 192 | 3.4 |
