Nd : YAG laser interaction with titanium implant surfaces for medical applications
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Interaction of Nd:YAG laser, operating at 1064 or 532 nm wavelengths and pulse duration of 40 picoseconds, with titanium implant has been studied. Surface damage threshold were estimated to be 0.9 and 0.6 J/cm(2) at wavelengths of 1064 and 532 nm, respectively. The titanium implant surface modification was studied at the laser fluence similar to 4.0 and 23.8 J/cm(2) (at 1064 nm) and 13.6 J/cm(2) (at 532 nm). The following titanium implant surface morphological changes were observed: (1) both laser wavelengths cause damage of the titanium in the central zone of the irradiated area (2) appearance of a hydrodynamic feature in the form of re-solidified droplets of the material in the surrounding outer zone with the 1064 nm laser wavelength, and (3) appearance of wave-like microstructures with the 532 nm wavelength. Generally, both laser wavelengths and the corresponding laser energy flux can efficiently enhance the titanium roughness to improve bio-integration with the biological tissues.
Keywords:picosecond Nd : YAG laser / titanium implant surface / laser-induced damage / surface modification
Source:Radiation Effects and Defects in Solids, 2008, 163, 4-6, 349-356
- 3rd International Meeting on Pulsed Plasma Laser Ablation (PPLA 2007), Jun 14-16, 2007, Scilla, Italy