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Incidence of dental fluorosis in rats
| Group | Number | The incidence of dental fluorosis | Total | Rate (%) | |||
|---|---|---|---|---|---|---|---|
|
|
|||||||
| Normal | I | II | III | ||||
| Control group | 12 | 12 | 0 | 0 | 0 | 0 | 0 |
| Fluorosis group | 12 | 1 | 3 | 5 | 3 | 11 | 91.67 |
| Blocking group | 12 | 1 | 2 | 4 | 5 | 11 | 91.67 |
| Blocking control group | 12 | 2 | 3 | 2 | 5 | 10 | 83.33 |
