Influence of H2SO4 Treatment on Biological Properties of Plasma Sprayed Titania Coatings

摘要

In this work, the plasma sprayed titania coatings were treated by H2SO4 for 24h at room temperature to improve the biological properties. The bioactivity was measured by simulated body fluid soaking test, and the biocompatibility was evaluated by quantifying the grafted collagen amount and in vitro cell culturetest. The results showed that titania coatings treated by 0.1Mand 1M H2SO4 can induce bone-like apatite formation afterimmersion in SBF for 28 days, while the titania coating treatedby 0.01M H2SO4 can not. H2SO4 treatment can promote thegrafting of collagen on titania coatings. The in vitro cell culturetest confirmed that collagen improved the cellular adhesion andproliferation on titania surface. In conclusion, a certainconcentration of H2SO4 treatment is beneficial in improving thebioactivity and biocompatibility of plasma sprayed titaniacoatings.