Table 1.
Periodontal regeneration assessment score (PRAS).
| PRAS | Score |
|---|---|
| Epithelial downgrowth (DG) | |
| Less than 20% | 4 |
| 21–40% | 3 |
| 41–60% | 2 |
| 61–80% | 1 |
| Above 80% | 0 |
| Cementum regeneration (CM) | |
| More than 80% | 4 |
| 61–80% | 3 |
| 41–60% | 2 |
| 21–40% | 1 |
| Less than 20% | 0 |
| Periodontal ligament regeneration (PDL) | |
| More than 80% | 4 |
| 61–80% | 3 |
| 41–60% | 2 |
| 21–40% | 1 |
| Less than 20% | 0 |
| Bone angle (BA) | |
| Full integration between host bone and tooth (< 5°) | 4 |
| Less than 15° | 3 |
| 16–30° | 2 |
| 31–45° | 1 |
| > 45° | 0 |
| Overall regeneration assessment | |
| Grade I: normal | 13–16 |
| Grade II: nearly normal | 9–12 |
| Grade III: abnormal | 5–8 |
| Grade IV: severely abnormal | 0–4 |