The effect of different whitening mouthwashes and simulated tooth brushing on surface roughness and microhardness of nanohybrid resin composite: an in vitro study

Table 2 Three-way mixed ANOVA results for surface roughness (Ra,µm) and Vickers microhardness (VHN)

Parameter	Source	Type III Sum of Squares	df	Mean square	F	p
Roughness	Brushing (B)	0.062	1	0.062	3819.000	0.056
	Experimental conditions (EC)	0.187	2	0.094	5.752	0.006 ^a
	Time (T)	1.078	2	0.539	28.798	< 0.001^a
	B x EC	0.029	2	0.015	0.894	0.416
	BxT	0.155	2	0.077	4.135	0.019 ^a
	T x EC	0.215	4	0.054	2.866	0.027 ^a
	B x T x EC	0.075	4	0.019	0.996	0.414
Microhardness	Brushing (B)	0.392	1	0.392	0.199	0.657
	Experimental conditions (EC)	5.644	2	2.822	1.433	0.249
	Time (T)	26.980	2	13.490	2.079	0.131
	B x EC	6.098	2	3.049	1.548	0.223
	BxT	5.106	2	2.553	0.393	0.676
	T x EC	19.095	4	4.774	0.736	0.570
	B x T x EC	34.658	4	8.665	1.335	0.262

EC: Experimental conditions; B: Brushing conditions; T: Time; BxEC: Brushing conditions versus Experimental conditions; TxEC: Time versus Experimental conditions; BxTxEC: Brushing conditions versus Time versus Experimental conditions.
^a Significant difference(p < 0.05)

ISSN: 1472-6831