Improving Surface Properties of PEEK for Dental Applications by Using Piranha Solution

Table 3

One-way ANOVA test of roughness by AFM.

Test	Within groups			Between groups
	Sum of squares	df	Mean square	Sum of squares	df	Mean square	F	Sig.
Roughness	22701.75	20	1135.088	178492.7	4	44623.17	39.313	0.000 (HS)