Group number

Surface roughness (Mean) ± SD; median (minimum-maximum)

F

P

CP-0

2.13 ± 0.13;

2.13 (1.91 ± 2.29)^A

314.321

P < 0.01

CP-1

2.14 ± 0.13;

2.15 (1.91 ± 2.32)^A

FP-0

2.96 ± 0.08;

2.94 (2.88 ± 3.16)^B

FP-1

2.96 ± 0.16;

2.94 (2.79 ± 3.21)^B

PP-0

1.65 ± 0.08;

1.66 (1.53 ± 1.77)^C

PP-1

1.64 ± 0.05;

1.65 (1.55 ± 1.73)^C