Table 1.

Mean and standard deviation of surface roughness (Ra) surface depth (Rz), mean color change (ΔE₀₀) of different ceramic thickness groups, before, after, and the overall changes in relation to types of immersion materials.

Ceramic thickness	Immersion materials	Mean (SD) before	Mean (SD) after	Mean (SD) changes
Ra
0.07 mm	Tea	0.16 (0.033)	0.19 (0.033)	0.03 (0.063)
	Coffee	0.22 (0.071)	0.25 (0.081)	0.03 (0.076)
	Coca-Cola	0.31 (0.033)	0.36 (0.070)	0.05 (0.054)
	P-value	0.001*	0.001*	0.001*
1.00 mm	Tea	0.17 (0.040)	0.18 (0.041)	0.01 (0.041)
	Coffee	0.36 (0.064)	0.39 (0.74)	0.03 (0.069)
	Coca-Cola	0.37 (0.042)	0.44 (0.66)	0.07 (0.054)
	P-value	0.138	0.088	0.062
Rz
0.07 mm	Tea	0.17 (0.054)	0.19 (0.045)	0.02 (0.051)
	Coffee	0.25 (0.036)	0.29 (0.042)	0.04 (0.059)
	Coca-Cola	0.31 (0.053)	0.39 (0.071)	0.08 (0.062)
	P-value	0.001*	0.001*	0.001*
1.00 mm	Tea	0.14 (0.044)	0.18 (0.051)	0.04 (0.080)
	Coffee	0.27 (0.621)	0.29 (0.028)	0.02 (0.064)
	Coca-Cola	0.31 (0.032)	0.40 (0.083)	0.09 (0.088)
	P-value	0.001*	0.030*	0.050*
ΔE00
0.07 mm	Tea	1.16 (0.082)	1.36 (0.083)	1.20 (0.824)
	Coffee	1.80 (0.286)	2.60 (0.372)	2.80 (0.329)
	Coca-Cola	2.81 (0.199)	3.01 (0.370)	3.20 (0.234)
	P-value	0.001*	0.001*	0.001*
1.00 mm	Tea	1.10 (0.038)	1.38 (0.018)	1.28 (0.895)
	Coffee	2.49 (0.162)	3.11 (0.232)	2.62 (0.923)
	Coca-Cola	3.14 (0.123)	3.62 (0.173)	3.18 (0.996)
	P-value	0.001*	0.000*	0.042*