. 2017 Feb 9;10(2):148. doi: 10.3390/ma10020148

Table 3.

Mean surface roughness values (R_a) after surface treatments.

Groups	Surface Roughness Values (Unit μm)
P	0.037 ± 0.011 ^a
A	0.546 ± 0.031 ^b
AS	0.530 ± 0.010 ^b
AM	0.525 ± 0.041 ^b
AMS	0.513 ± 0.052 ^b

^a,b Groups shown with different letters were significantly different (p < 0.05).