Surface modification of titanium by nano-TiO2/HA bioceramic coating

• Published in: Applied surface science Vol. 255; no. 2; pp. 442 - 445
• Main Authors: HE, G, HU, J, WEI, S. C, LI, J. H, LIANG, X. H, LUO, E
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier 15.11.2008
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Physics; Surface modification; Inorganic compounds; Transition elements; Transition element compounds; Titanium; Osteoblast; Surface treatments; 87.17.Ee; Hydroxyapatite; Titanium implant; Titanium oxide; 81.65.Cf
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2008.06.088

A nano-TiO2/hydroxyapatite composite bioceramic coating was developed and applied to the surfaces of pure titanium discs by the sol-gel method. A TiO2 anatase bioceramic coating was utilized in the inner layer, which could adhere tightly to the titanium substrate. A porous hydroxyapatite (HA) bioceramic coating was utilized in the outer layer, which has higher solubility and better short-term bioactivity. Conventional HA coatings and commercially pure titanium were used as controls. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the crystallization, surface morphology, and thickness of the coatings. The bioactivities of the coatings were evaluated by in vitro osteoblast cultures. Results showed that the nano-TiO2/HA composite bioceramic coating exhibited good crystallization and homogeneous, nano-scale surface morphology. In addition, the nano-TiO2/HA coating adhered tightly to the substrate, and the in vitro osteoblast cultures exhibited satisfactory bioactivity.