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| Score | Extent of new bone in defect |
|---|---|
| 0 | No bone formation |
| 1 | Minimal bone formation (only very small portion in the defect) |
| 2 | Low bone formation (less than one-fourth of the defect) |
| 3 | Moderate bone formation (less than one-half and more than one-fourth of the defect) |
| 4 | Abundant bone formation (less than three quarter and more than one-half of the defect) |
| 5 | Extensive bone formation (more than three quarter of the defect) |
