title: Protective effect of TiF(4) solutions with different concentrations and pH on development of erosion-like lesions.
abstract: OBJECTIVE
  To evaluate how concentration and pH of TiF(4) influence the erosion-protective effect.
  
  
  METHODS
  Specimens were treated with a TiF(4) solution: (1) 0.5 M F, pH 1.2, (2) 0.05 M F, pH 2.1, (3) 0.5 M F, pH 2.1, or (4) 0.05 M F, pH 1.2; then, they were exposed to HCl.
  
  
  RESULTS
  After 2 min, the proportions of the area covered with the coating were 93, 71, 17 and 0% in groups 1-4. When present, the coating seemed to protect the surface. After 6 min, a coating could only be seen in group 1 (43%).
  
  
  CONCLUSIONS
  Reducing the concentration of TiF(4) and increasing the pH of the solution decreased the protective effect.
authors.affiliation: Institute of Clinical Dentistry, Department of Cariology and Gerodontology Faculty of Dentistry, University of Oslo, Oslo, Norway. lenehh@odont.uio.no
authors.forename: L H
authors.initials: LH
authors.lastname: Hove
authors.forename: B
authors.initials: B
authors.lastname: Holme
authors.forename: K R
authors.initials: KR
authors.lastname: Stenhagen
authors.forename: A B
authors.initials: AB
authors.lastname: Tveit
mesh_terms: D003743:Dental Enamel / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D005459:Fluorides / Q000737:chemistry / Q000627:therapeutic use*; D005460:Fluorides, Topical / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007368:Interferometry / Q000379:methods; D008963:Molar; D018709:Statistics, Nonparametric; D014025:Titanium / Q000737:chemistry / Q000627:therapeutic use*; D014077:Tooth Erosion / Q000517:prevention & control*
chemical_list: D005460:Fluorides, Topical; D014025:Titanium; D005459:Fluorides; C032240:titanium tetrafluoride