title: [The influence of ultraviolet irradiation on sandblasted and acid-etching surface adsorbing human fibronectin].
abstract: OBJECTIVE
  To study the influence of ultraviolet (UV) irradiation on physical and chemical properties of sandblasted and acid-etched (SA) titanium surface and their ability to adsorb human fibronectin (HFn).
  
  
  METHODS
  SA and UV-SA surfaces were separately prepared. Surface morphology, roughness, elemental composition, wettability and HFn adsorption assay were performed for comparative analysis of these two surfaces.
  
  
  RESULTS
  SA and UV-SA surface had a similar morphology with multi-holes, and average roughness. UV-SA surface had a lower C content (22.83%) and higher O content (51.20%) and presented hydrophilicity, while SA surface showed hydrophobicity. But the quantity of adsorbed HFn on SA surface at 10 min assay point [(0.41 ± 0.07) µg] was statistically higher than that on UV-SA surface [(0.26 ± 0.08) µg](P = 0.007).
  
  
  CONCLUSIONS
  UV irradiation would not change the morphology and roughness of SA surface. However, it could reduce the hydrocarbon and increase the hydroxyl groups, and the absorption of HFn on UV-SA surface at 10 min assay point was statistically lower than that on SA surface. Therefore, the in-vitro bioactivity of UV-SA surface was not as good as that of SA surface.
authors: Department of Periodontics and Implantology,Guangdong Provincial Stomatological Hospital & The Affiliated Stomatological Hospital of Southern Medical University, Guangzhou 510280, China.
authors: Shaobing
authors: S
authors: Li
authors: Email: zhangxueyang666@126.com.
authors: Xueyang
authors: X
authors: Zhang
authors: Jia
authors: J
authors: Ni
authors: Congyun
authors: C
authors: Wei
authors: Mingdeng
authors: M
authors: Rong
authors: Lei
authors: L
authors: Zhou
mesh_terms: D000327:Adsorption; D005353:Fibronectins / Q000737:chemistry*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D014025:Titanium; D014466:Ultraviolet Rays; D017155:Wettability
chemical_list: D005353:Fibronectins; D014025:Titanium