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Distribution of apical periodontitis according to the quality of endodontic treatment.
| Endodontic treatment | Healthy periodontium | Apical periodontitis | Total |
|---|---|---|---|
| (PAI = 1) | (PAI = 2 to 5) | ||
| Adequate | 146 (91.8%) | 13 (8.2%) | 159 (100%) |
| Inadequate | 32 (8.5%) | 346 (91.5%) | 378 (100%) |
