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Concentration of S. mutans on enamel surfaces (CFU/mL)
| Groups | Mean ± SD | Min-max |
|---|---|---|
| Sound enamel (Group B1) | 4651.66 ± 3959.2 a | 810–11500 |
| Hypomineralization enamel (Group B2) | 7154.9 ± 753.33 a | 3100–22000 |
| Fluoride varnish (Group B3) | 000 b | 000.000 |
| Nano hydroxyapatite paste (Group B4) | 78.33 ± 52.69 c | 20–150 |
| Resin infiltrant | 500 ± 299.3 d | 180–900 |
| p-value | p<0.001 | p<0.001 |
