Table 3.
Distribution of total number of teeth, teeth with AP, ET and AP/ET according to the age group
| Age group | No of teeth | Teeth with AP (%) | Teeth with ET (%)* | Teeth w. AP/ET (%)** |
|---|---|---|---|---|
| < 20 | 408 | 30 (7.4%) | 5 (1.2%) | 2 (40.0%) |
| 20-29 | 1007 | 98 (9.7%) | 30 (3.0%) | 15 (50.0%) |
| 30-39 | 1584 | 181 (11.4%) | 37 (2.3%) | 16 (43.2%) |
| 40-49 | 594 | 94 (15.8%) | 16 (2.7%) | 9 (56.3%) |
| 50-59 | 340 | 66 (19.4%) | 2 (0.6%) | - |
| ≥ 60 | 198 | 40 (20.2%) | 5 (2.5%) | 2 (40.0%) |
| Total | 4131 | 509 (12.3%) | 95 (2.3%) | 44 (46.3%) |
*P < 0.01, **P < 0.001.
AP, apical periodontitis; ET, endodontically treated teeth; AP/ET, apical periodontitis in endodontically treated teeth