Table 2.

Contact angle measurements

Groups	Theta (θ)	Standard deviation
A – polished	83.4	4.4
B – bead blasted	68.9	3.5
C – sulfuric acid anodized	72.2	3.9
D – hydrofluoric acid anodized	57.9	1.9
E – hydrofluoric acid etched	59.9	3.1