R _{z} | Mean baseline roughness depth | Mean post polishing roughness depth | Mean difference R_{t} |
---|---|---|---|
Group 1 | 2.10 μm | 8.19 μm | 6.09 μm |
Group 2 | 2.02 μm | 8.40 μm | 6.38 μm |
Group 3 | 2.11 μm | 7.95 μm | 5.84 μm |
Group 4 | 2.04 μm | 10.93 μm | 8.89 μm |
p value | 0.702 | < 0.001 | < 0.001 |