Table 2 Descriptive statistics of surface roughness parameters (µm), fracture toughness (K_IC), and biaxial flexural strengths (MPa) before and after fatigue for different study groups

1.56 ± 0.2 ^A

8.1 ± 0.3 ^A

6.3 ± 1.2 ^A

5.6 ± 0.3 ^A

1247.5 ± 25.8 ^A1

1044.9 ± 34.4 ^A2

1.8 ± 0.1 ^A

9.8 ± 1.3 ^A

7.9 ± 0.9 ^AB

6.1 ± 0.25 ^B

1451.5 ± 34.9 ^B1

1228 ± 18.5 ^B2

5.4 ± 0.09 ^BC

14.2 ± 2.4 ^B

9.7 ± 1.8 ^C

4.1 ± 0.87 ^C

909.7 ± 22.9 ^C1

690.7 ± 18.3 ^C2

1.4 ± 0.07 ^A

8.4 ± 1.4 ^A

6.3 ± 0.8 ^A

5.7 ± 0.37 ^A

1271 ± 14.1 ^A1

1059 ± 30.4 ^A2

1.8 ± 0.04 ^A

9.3 ± 0.7 ^A

8.7 ± 0.9 ^BC

6.0 ± 0.29 ^B

1442.4 ± 24.3 ^B1

1259 ± 24.6 ^B2

6.0 ± 0.08 ^B

13.1 ± 2.1 ^BC

9.1 ± 1.6 ^C

4.3 ± 0.92 ^C

973.4 ± 23.9 ^D1

668.9 ± 32.1 ^C2

1.5 ± 0.04 ^A

8.3 ± 1.3 ^A

6.4 ± 1.1 ^A

6.1 ± 0.19 ^B

812.8 ± 27.9 ^E1

698.6 ± 19.7 ^C2

2.1 ± 0.06 ^A

10.4 ± 1.2 ^A

7.0 ± 0.9 ^AB

6.6 ± 0.41 ^D

860.3 ± 18.2 ^F1

769.2 ± 8.1 ^D2

4.1 ± 1.03 ^CD

11.5 ± 2.9 ^AC

8.7 ± 1.3 ^BC

4.7 ± 1.1 ^C

692.3 ± 16.8 ^G1

601.3 ± 20.2 ^E2

1.46 ± 0.08 ^A

8.6 ± 2.1 ^A

6.9 ± 1.4 ^A

6.3 ± 0.22 ^BD

833.5 ± 13.2 ^EF1

739.2 ± 5.4 ^D2

2.3 ± 0.07 ^A

10.7 ± 1.6 ^A

6.6 ± 1.2 ^A

6.7 ± 0.35 ^D

858.3 ± 17.1 ^F1

764.3 ± 18.3 ^D2

3.0 ± 0.2 ^D

11.2 ± 2.7 ^AC

8.5 ± 1.9 ^BC

4.4 ± 0.68 ^C

686.5 ± 13.2 ^G1

599.2 ± 10.5 ^E2