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Improvement in the initial radiolucency at each zone according to Gruen et al. [6]
| Zone | Number | % |
|---|---|---|
| 1 | 3 | 20.0 |
| 2 | 3 | 20.0 |
| 3 | 5 | 33.3 |
| 4 | 4 | 26.7 |
| 5 | 7 | 47.7 |
| 6 | 2 | 13.3 |
| 7 | 9 | 60.0 |
Percentages are calculated by number in each zone divided by 15, the total number of improvement in the initial radiolucency
