title: Fluoridated hydroxyapatite/titanium dioxide nanocomposite coating fabricated by a modified electrochemical deposition.
abstract: Fluoridated hydroxyapatite/titanium dioxide nanocomposite coating was successfully fabricated by a modified electrochemical deposition technique. F(-) ions, nanoscaled TiO(2) particles and 6% H(2)O(2) was added into the electrolyte, and ultrasonication was also performed to prepare this nanocomposite coating. The microstructure, phase composition, dissolution rate, bonding strength and in vitro cellular responses of the composite coating were investigated. The results show that the composite coating was uniform and dense owing to the effects of H(2)O(2) and ultrasonication. The thickness of the composite coating was ~5 mum and scanning electron microscopy revealed that nanoscaled TiO(2) particles were imbedded uniformly between FHA crystals. The addition of F(-) and TiO(2) reduced the crystallite size and increased the crystallinity of HA in FHA/TiO(2) composite coating. In addition, the composite coating shows higher bonding strength and lower dissolution rate than pure HA coating, and the in vitro bioactivity of FHA/TiO(2) composite coating was not affected as compared with pure HA coating.
authors.affiliation: State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Yonglie
authors.initials: Y
authors.lastname: Chao
authors.forename: Qianbing
authors.initials: Q
authors.lastname: Wan
authors.forename: Kangping
authors.initials: K
authors.lastname: Yan
authors.forename: Yukun
authors.initials: Y
authors.lastname: Meng
mesh_terms: D016475:3T3 Cells; D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D049109:Cell Proliferation; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D055664:Electrochemical Techniques; D006882:Hydroxyapatites / Q000302:isolation & purification*; D008422:Materials Testing; D051379:Mice; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D014025:Titanium / Q000302:isolation & purification*
chemical_list: D020099:Coated Materials, Biocompatible; D006882:Hydroxyapatites; C009495:titanium dioxide; C028869:fluor-hydroxylapatite; D014025:Titanium; D000469:Alkaline Phosphatase