Multiple comparison of the before wear test mean surface roughness values (Ra) of the three test groups and the after wear test mean surface roughness values (Ra) of the three test groups using post-hoc tukey's HSD analysis
| Groups | Mean difference | P-value | |
|---|---|---|---|
| Before wear test | I & II | 0.348 | <0.001 |
| I & III | 0.782 | <0.001 |
|
| I & III | 0.433 | <0.001 |
|
| After wear test | I & II | 4.826 | 0.014 |
| I & III | 4.613 | 0.019 |
|
| I & III | 0.212 | 0.990 |
*P<0.05, statistically significant.