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Descriptive statistics for the surface roughness (nm) for the different groups
| Variables | N | Mean (nm) ± SD |
|---|---|---|
| GI | 10 | (27.46 ± 5.45) a |
| GII | 10 | (47 ± 7.01) b |
| GIII | 10 | (39.72 ± 4.72) c |
Different superscript letter in the column denotes significant difference using Tukey`s post hoc test at 95% confidence level (p<0.05).
