Change in Surface Roughness of Esthetic Restorative Materials after Exposure to Different Immersion Regimes in a Cola Drink

Table 4

Showing mean difference in surface roughness (𝑅_𝑎, μm) among various subgroups of group II—resin modified glass ionomer cement (GC Fuji II LC).

Subgroup	Subgroup	Surface roughness (𝑅𝑎, 𝜇m)
		Mean difference	(𝑃 value)	Significance
Subgroup IIA (Control)	Subgroup IIB	−0.02	>0.05	NS
	Subgroup IIC	−0.21	<0.001	HS
	Subgroup IID	−0.45	<0.001	HS
	Subgroup IIE	−1.04	<0.001	HS