highly significantp<0.01
There was a statistically highly significant difference seen (p<0.01) for Ra B within the acrylic-based soft liner (I) and silicone-based soft liner (II) groups, with higher values in the acrylic-based soft liner (I) group; the surface roughness after brushing (Ra A) between the acrylic-based soft liner (I) and silicone-based soft liner (II) groups, with higher values in the acrylic-based soft liner (I) group; and the average surface roughness (Rz) diff between the acrylic-based soft liner (I) and silicone-based soft liner (II) groups, with higher values in the acrylic-based soft liner (I) group.