Table 3.
Comparison of mean surface microhardness values
| Variables | Groups | Number of specimens | Mean | SD | F | The P value of one-way ANOVA |
|---|---|---|---|---|---|---|
| Baseline | CPP-ACPF | 15 | 302.230 | 5.664 | 0.630 | 0.538# |
| Resin infiltration | 15 | 304.533 | 6.199 | |||
| Colloidal Silica Infiltration | 15 | 303.843 | 5.409 | |||
| Demineralization | CPP-ACPF | 15 | 174.495 | 1.574 | 0.810 | 0.452# |
| Resin Infiltration | 15 | 174.457 | 1.840 | |||
| Colloidal silica infiltration | 15 | 175.167 | 1.729 | |||
| Post treatment | CPP-ACPF | 15 | 262.938 | 5.152 | 407.951 | 0.000** |
| Resin infiltration | 15 | 283.026 | 6.636 | |||
| Colloidal silica infiltration | 15 | 229.799 | 3.015 |
**Statistically highly significant difference (P<0.01), #Nonsignificant difference (P>0.05). CPP: Casein phosphopeptide, SD: Standard deviation, ACP: Amorphous calcium phosphate, ACPF: ACPF fluoride