Table 1 Mean and Standard Deviations of R_a, R_q, R_z parameters before and after instrumentation of experimental instruments (μm)

R_a

10.294 ± 4.548

9.254 ± 3.318

11.107 ± 3.269

9.324 ± 2.596

7.454 ± 2.039

7.453 ± 2.014

8.337 ± 1.798

6.532 ± 1.266

R_q

13.402 ± 5.181

12.521 ± 4.172

14.510 ± 3.874

12.079 ± 3.428

10.054 ± 2.464

10.548 ± 3.144

10.905 ± 2.425^c

9.116 ± 1.934^d

R_z

125.239 ± 22.670

112.889 ± 30.062

133.965 ± 16.878^a

105.560 ± 24.745^b

85.046 ± 19.477

97.521 ± 36.344

91.225 ± 23.670

83.691 ± 27.808