Micron-Size Particles Emission from Bioceramics Induced by Pulsed Laser Deposition

Pulsed laser deposition of hydroxyapatite is applied to cover titanium medical prothesis. Laser irradiation of ceramics by power-pulsed ruby laser produces high velocity micron-size particles emission with a narrow ejection plume directed normally to the target surface. Photoemitted particles are deposited on a metal surface at 400°C to obtain a granular film, stoichiometric, polycrystalline, and very adherent to the substrate. Deposited films are highly biocompatible and may be used to induce osteointegration processes of the implanted prothesis with the bone tissues. The comparison between laser and plasma spray depositions of biocerarnics is discussed.