Table 4.

Two-way ANOVA for color change (ΔE₀₀)

	df	SS	MS	F	P value	Partial η2
ΔEt0−t1 (Staining Effect)
Cleaning Agent	1	405.793	405.793	3.111	0.082	0.045
Ultrasonic Duration	2	115.476	57.738	0.443	0.644	0.013
Cleaning Agent × Ultrasonic Duration	2	443.578	221.789	1.701	0.190	0.049
Error	66	8607.710	130.420
ΔEt0−t2 (Net Color Change)
Cleaning Agent	1	727.902	727.902	5.922	0.018*	0.082
Ultrasonic Duration	2	22.158	11.079	0.090	0.914	0.003
Cleaning Agent × Ultrasonic Duration	2	814.552	407.276	3.314	0.043*	0.091
Error	66	8112.025	122.909
ΔEt1−t2 (Cleaning Effect)
Cleaning Agent	1	1.397	1.397	0.066	0.799	0.001
Ultrasonic Duration	2	27.457	13.728	0.645	0.528	0.019
Cleaning Agent × Ultrasonic Duration	2	15.705	7.853	0.369	0.693	0.011
Error	66	1405.652	21.298

df Degrees of freedom, SS Sum of Squares, MS Mean Square, F ANOVA test statistic, Partial η² Partial Eta Squared

*Significant at P < 0.05