Table 3: Surface roughness and wettability for HAP, HAP—30% PA, and HAP—30% PA—12 h.

SampleSurface roughness Wettability
Ra ( m)Contact angle (degrees)

HAPMean0.25102.10c
SD0.062.98
HAP—30% PAMean0.91a55.13c
SD0.050.35
HAP—30% PA—12 hMean0.96a,b13.67c
SD0.043.54

Surface roughness: indicates significant difference from HAP. indicates significant difference from HAP—30% PA.
Wettability: indicates significant differences among the samples.