In Vitro Bioactivity Study of PLD-Coatings and Bulk Bioactive Glasses

摘要

Bioactive glass coatings have been obtained by Pulsed Laser Deposition (PLD) from bulk glasses of different compositions in the system SiO2-Na2O-K.2O-CaO-MgO-P2O5-B2O3. A comparative study of the in vitro bioactive behaviour of the PLD-coatings and bulk glasses was carried out. Fourier Transform Infrared and X-ray Induced Photoelectron Spectroscopies show that the bonding configuration of the bulk glasses is not congruently transferred to the coatings during the ablation process. These results are in agreement with the in vitro tests that show a similar bioactive process but a different bioactivity grade between the bulk glasses and the corresponding PLD coatings. The composition and bonding configuration of the bioactive coatings grown by PLD should be carefully tuned in order to obtain an adequate biological response.