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Lesion depth before remineralization (BR) and after remineralization (AR) in each group (mean ± SD) as observed with the polarized light microscope.
| F level (ppm) | Time (days) | Lesion depth (µm) | |
|---|---|---|---|
| BR | ≈0.0 | 14 | 210 ± 10 |
|
| |||
| AR | 0.0 | 7 14 |
195 ± 10 200 ± 15 |
| 0.1 | 7 14 |
165 ± 20 168 ± 20 |
|
| 0.5 | 7 14 |
170 ± 10 165 ± 15 |
|
| 1.0 | 7 14 |
169 ± 15 167 ± 15 |
|
| 5.0 | 7 14 |
165 ± 10 163 ± 20 |
|
| 10.0 | 7 14 |
170 ± 30 169 ± 20 |
|
