In this work the titanium surface modification by Laser Nd:YAG irradiation was investigated. Laser parameters such as power, wavelength, frequency, scanning speed and the exposure area were maintained constant, except the matrix spacing, which was equal 0,01 and 0,02 mm. Characterization was carried out by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) analysis, for which the spectra were refined by the Rietveld method. In the analysis by SEM, a change in the topography was observed, with a rough surface obtained by ablation phenomenon. The Rietveld analysis of the spectra presented the phases TiN, Ti2N, TiO2 (anatase and rutile), and the sample with spacing equal to 0,01 mm presented a larger amount of oxides and nitrides. This may be due to the beam overlapping, which induces a surface with larger thermodynamic stability. The oxides and nitrides are of great importance, because they are responsible for producing a satisfactory interaction between the bone and the implant.
Nd:YAG Laser; titanium; surface modification; biomaterials
