title: [Effect of decontaminating solutions on titanium surface: an in vitro study of human epithelial cell culture].
abstract: BACKGROUND
  The effects of three different decontaminating solutions in clinical use for peri-implantitis therapy on the chemical structure and surface roughness of commercially pure (CP) Ti were investigated. A further aim was to survey the response of the biological environment to these changes, by examining the attachment and proliferation of human epithelial cells after treatment of the Ti surfaces with these solutions.
  
  
  METHODS
  CP (grade 4) machined titanium discs (CAMLOG Biotechnologies AG, Switzerland) were treated with 3% H2O2 (5 min), saturated citric acid (pH = 1; 1 min) or chlorhexidine gel (CHX, 5 min). The surface properties were followed through the use of X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The epithelial cell attachment and proliferation was examined by means of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and bicinchoninic acid (BCA) protein-content assays.
  
  
  RESULTS
  XPS showed an intact TiO2 layer on each sample and CHX was adsorbed by the surface, as C-O and/or C=O bond formation was revealed. AFM results gave no significant changes in the roughness after treating the surfaces with the cleaning solutions. While MTT and BCA assays did not show significant differences in epithelial cell attachments, the cell proliferation was significantly increased after H2O2 treatment as compared to CHX (not shown by BCA assays).
  
  
  CONCLUSIONS
  The applied decontaminating agents do not damage the Ti surface. H2O2 can be used effectively in decontaminating the implants affected by peri-implantitis, as the human epithelial cell growth was improved, in contrast with CHX.
authors.affiliation: SZTE Fogorvostudományi Kar, Fogpótlástani es Orális Biológiai Tanszék, Szeged.
authors.forename: Krisztina
authors.initials: K
authors.lastname: Ungvári
authors.forename: K István
authors.initials: KI
authors.lastname: Pelsoczi
authors.forename: Bernadett
authors.initials: B
authors.lastname: Kormos
authors.forename: Albert
authors.initials: A
authors.lastname: Oszkó
authors.forename: Márta
authors.initials: M
authors.lastname: Radnai
authors.forename: Katalin
authors.initials: K
authors.lastname: Nagy
authors.forename: András
authors.initials: A
authors.lastname: Fazekas
authors.forename: Kinga
authors.initials: K
authors.lastname: Turzó
mesh_terms: D000891:Anti-Infective Agents, Local / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D002710:Chlorhexidine / Q000494:pharmacology*; D019343:Citric Acid / Q000494:pharmacology*; D004396:Coloring Agents / Q000032:analysis; D003666:Decontamination / Q000379:methods; D004202:Disinfectants / Q000494:pharmacology*; D004847:Epithelial Cells / Q000187:drug effects*; D005782:Gels; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D007202:Indicators and Reagents / Q000032:analysis; D018625:Microscopy, Atomic Force; D056951:Photoelectron Spectroscopy; D011804:Quinolines / Q000032:analysis; D012996:Solutions; D013499:Surface Properties / Q000187:drug effects; D013778:Tetrazolium Salts / Q000032:analysis; D013844:Thiazoles / Q000032:analysis; D014025:Titanium / Q000737:chemistry*
chemical_list: D000891:Anti-Infective Agents, Local; D004396:Coloring Agents; D004202:Disinfectants; D005782:Gels; D007202:Indicators and Reagents; D011804:Quinolines; D012996:Solutions; D013778:Tetrazolium Salts; D013844:Thiazoles; D019343:Citric Acid; D006861:Hydrogen Peroxide; C047117:bicinchoninic acid; D014025:Titanium; C022616:thiazolyl blue; D002710:Chlorhexidine