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Surface roughness (Ra) of the cp-Ti, TNT, and TiAg-NT samples.
Notes: **P<0.01. Results expressed as mean ± SD (ANOVA on all groups).
Abbreviations: cp-Ti, commercial pure titanium; TNT, titania nanotubes; TiAg-NT, TiAg alloys with nanotubular coverings; ANOVA, analysis of variance.
