Classification of peri-implantitis
| Restoration type | Early | Moderate | Advanced | Total | |
|---|---|---|---|---|---|
| 2-IB (17 patients, 34 implants) | P1–P3 | 0 | 0 | 0 | 0 |
| 3-IB (22 patients, 66 implants) | P1 | 0 | 0 | 1 | 1 |
| P2 | 0 | 1 | 2 | 3 | |
| P3 | 0 | 1 | 1 | 2 | |
| P4 | 0 | 1 | 0 | 1 | |
| 3-IC (31 patients, 93 implants) | P1 | 1 | 2 | 1 | 4 |
| P2 | 1 | 1 | 2 | 4 | |
| P3 | 0 | 3 | 0 | 3 | |
| 4-IC (9 patients, 36 implants) | P1–P4 | 0 | 0 | 0 | 0 |
| Total | 2 | 9 | 6 | 17 | |