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Showing mean difference in surface roughness (R a, μm) among various subgroups of group I—conventional glass ionomer cement (GC Fuji II).
| Subgroup | Subgroup | Surface roughness (R a, μm) | ||
|---|---|---|---|---|
| Mean difference | (P value) | Significance | ||
| Subgroup IA (Control) | Subgroup IB | −0.11 | <0.001 | HS |
| Subgroup IC | −0.28 | <0.001 | HS | |
| Subgroup ID | −0.97 | <0.001 | HS | |
| Subgroup IE | −1.38 | <0.001 | HS | |
