|
The biological properties of implants can be improved by modifying calcium phosphate (CaP)/TiO2 thin
films on dental implants by controlling the structure, morphology, and thickness of the TiO2 layer.
Hierarchical TiO2 nanoflowers (TNFs) were successfully fabricated on titanium substrate via
hydrothermal reaction of titanium tetraisopropoxide and hydrochloric acid aqueous solution at 180°C
for 3 h. The TNF films were soaked in modified simulated body fluid (m-SBF) for 1 to 7 days to form
CaP crystals. The crystalline structure, shape and size of the prepared composites were characterized by
X-ray diffractometry and scanning electron microscopy (SEM). The nucleation and growth of calcium
phosphate coating on TNF in m-SBF solution were investigated using SEM, XPS, and FT-IR surface
analytical techniques. The density of CaP increased with increase of soaking time in m-SBF. The CaP
crystallites coated on TNF were obtained as spherical agglomerates with nano-sized calcium phosphate
particles exhibiting low β-TCP crystallinity. The CaP/TNF coatings showed significant improvement in
corrosion resistance compared with TNF coating
|
|
