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Radiographic analysis results for three point grading scale
| 6 weeks | 12 weeks | |||||
|---|---|---|---|---|---|---|
| Grade 1 | Grade 2 | Grade 3 | Grade 1 | Grade 2 | Grade 3 | |
| Saline | 2 | 4 | 2 | 0 | 3 | 5 |
| Local ZA | 4 | 4 | 0 | 5 | 3 | 0 |
| Systemic ZA | 5 | 3 | 0 | 1 | 5 | 2 |
Grade 1 many bone chips still clearly visible in the fusion-mass; Grade 2 some bone chips visible in the fusion-mass along with new bone; Grade 3 mostly new bone in fusion-mass with only very occasional residual bone chips
