Table 2.

Roughness parameters for untreated and differently instrumented surfaces

	Ra [µm]	Rz [µm]	Rt [µm]
Disc I
0 (n = 8)	1.37 ± 0.14 A	7.33 ± 0.56 A	8.60 ± 0.90 A
A (n = 8)	0.57 ± 0.09 B	3.40 ± 0.61 B	4.30 ± 0.90 B
B (n = 8)	0.88 ± 0.17 C	4.48 ± 0.69 C	5.42 ± 0.91 C
C (n = 8)	0.76 ± 0.18 D	4.43 ± 0.87 C	5.95 ± 1.43 CD
D (n = 8)	1.03 ± 0.13 E	5.15 ± 0.75 D	6.25 ± 1.09 D
E (n = 8)	1.37 ± 0.17 A	6.90 ± 0.78 A	8.27 ± 1.03 A
Disc II
0 (n = 8)	1.30 ± 0.14 A	7.33 ± 0.82 A	9.01 ± 1.40 A
A (n = 8)	0.58 ± 0.14 B	3.34 ± 0.76 B	4.33 ± 1.12 B
B (n = 8)	0.99 ± 0.25 C	4.03 ± 0.83 C	6.05 ± 1.33 C
C (n = 8)	0.74 ± 0.23 D	4.89 ± 0.96 D	5.24 ± 1.48 BC
D (n = 8)	1.10 ± 0.17 C	5.48 ± 0.83 C	6.75 ± 1.14 C
E (n = 8)	1.33 ± 0.21 A	6.94 ± 1.22 A	8.87 ± 2.11 A
Disc III
0 (n = 8)	0.40 ± 0.07 A	2.48 ± 0.40 AB	3.10 ± 0.57 AB
A (n = 8)	0.54 ± 0.10 B	2.82 ± 0.42 B	3.47 ± 0.69 B
B (n = 8)	0.39 ± 0.07 A	2.26 ± 0.45 AD	2.78 ± 0.65 A
C (n = 8)	0.59 ± 0.18 B	3.18 ± 0.83 C	4.44 ± 1.31 C
D (n = 8)	0.35 ± 0.05 A	2.04 ± 0.30 D	2.55 ± 0.46 A
E (n = 8)	0.37 ± 0.04 A	2.22 ± 0.31 AD	2.84 ± 0.53 A
Disc IV
0 (n = 8)	0.04 ± 0.01 A	0.02 ± 0.07 A	0.26 ± 0.08 A
A (n = 8)	0.42 ± 0.08 B	2.30 ± 0.49 B	2.87 ± 0.61 B
B (n = 8)	0.05 ± 0.03 A	0.36 ± 0.16 A	0.45 ± 0.18 A
C (n = 8)	0.36 ± 0.18 C	2.21 ± 0.90 B	3.51 ± 1.75 B
D (n = 8)	0.06 ± 0.02 A	0.40 ± 0.16 A	0.53 ± 0.30 A
E (n = 8)	0.04 ± 0.02 A	0.30 ± 0.11 A	0.40 ± 0.15 A

Disc I—Inicell, Disc II—SLA, Disc III—non pretreated, Disc IV—machined

0—non instrumented surface, A—steel, B—PEEK, C—titanium, D—Carbon, E—resin

Ra—arithmetic mean deviation of the profile

Rz—maximum height of profile, Rt—range of assessed profile points of the assessed surface profile

Different bold capitals indicate significant differences (valid only in the same box)

With regard to Disc 2: Roughness parameters were assessed in parallel direction to the processing direction of the machined surface