Table 1 Within-group comparison of surface roughness parameter in the study groups at different time points
From: Composite surface roughness and color change following airflow usage
Group | Time | ||
|---|---|---|---|
Ra (µm) (T1) | Ra (µm) (T2) | (P value) | |
Calcium carbonate | 0.334 ± 0.071 | 0.251 ± 0.014 | 0.01 |
Sodium bicarbonate | 0.393 ± 0.055 | 0.421 ± 0.208 | 0.471 |
FlexiDisc | 0.345 ± 0.029 | 0.207 ± 0.076 | 0.019 |