Bioactive Surface Modification of Hydroxyapatite

Table 3

Surface roughness and wettability for HAP, HAP—30% PA, and HAP—30% PA—12 h.

Sample		Surface roughness	Wettability
		Ra (𝜇m)	Contact angle (degrees)
HAP	Mean	0.25	102.10^c
	SD	0.06	2.98
HAP—30% PA	Mean	0.91^a	55.13^c
	SD	0.05	0.35
HAP—30% PA—12 h	Mean	0.96^a,b	13.67^c
	SD	0.04	3.54

Surface roughness: ^a𝑃<0.01 indicates significant difference from HAP. ^b𝑃<0.05 indicates significant difference from HAP—30% PA.
Wettability: ^c𝑃<0.01 indicates significant differences among the samples.