| Group | Endo | Coronal | No. teeth | PPI | API | %API |
|---|---|---|---|---|---|---|
| 1 | Good (GE) | Good (GR) | 330.5 | 28.5 | 302.0 | 91.4 |
| 2 | Good (GE) | Poor (PR) | 164.5 | 92.0 | 72.5 | 44.1 |
| 3 | Poor (PE) | Good (GR) | 302.5 | 98.0 | 204.5 | 67.6 |
| 4 | Poor (PE) | Poor (PR) | 188.0 | 154.0 | 34.0 | 18.1 |
PPI, presence of periradicular inflammation. API, absence of periradicular inflammation.