Mean value and standard deviation of average surface roughness (Ra) and maximum peak to valley roughness height (Ry). Different uppercase, lowercase letters denote statistical differences among materials
| Group | Polish | Ra (Mean ± STD/µm) | Ry (Mean ± STD/µm) |
|---|---|---|---|
| Conventional | NP #400 | 3.53 ± 0.20A 1.03 ± 0.04BCD | 33.30 ± 2.76a 11.82 ± 0.70bc |
| #800 | 0.65 ± 0.02DE | 14.75 ± 1.31b | |
| Milling | NP | 0.79 ± 0.04DE | 8.78 ± 0.69bcd |
| #400 | 0.72 ± 0.02DE | 9.13 ± 0.58bcd | |
| #800 | 0.46 ± 0.01E | 7.02 ± 0.48cd | |
| DLP | NP | 1.29 ± 0.76BC | 10.70 ± 1.08bcd |
| #400 | 0.75 ± 0.02DE | 5.09 ± 0.09cd | |
| #800 | 0.45 ± 0.01E | 3.71 ± 0.20d | |
| LCD | NP | 1.35 ± 0.07B | 15.53 ± 2.01b |
| #400 | 0.85 ± 0.03CDE | 10.65 ± 0.47bcd | |
| #800 | 0.46 ± 0.01E | 9.19 ± 0.87bcd |
