title: Whitening efficacy of three over-the-counter oral rinses.
abstract: OBJECTIVE
  The aim of the study was to determine the whitening efficacy of three different oral rinses.
  
  
  METHODS
  Eighty extracted teeth were randomly divided into four groups, cleaned with a slow-speed handpiece with pumice and placed in a staining broth for 14 days. Measurements of tooth shades were measured with a spectrophotometer. Three groups (20 each) were then exposed to Colgate Plax Whitening Blancheur (A), White Glo 2 in 1 (B) and Plus White (C) for 21 days for 2 minutes a day and in between stored in artificial saliva. The other group acted as a control and was only stored in the artificial saliva.
  
  
  RESULTS
  The Kruskal-Wallis and Tukey-Kramer analysis showed no statistical significant differences (on a 5% basis) for the differences between base-line and after treatment (21 days) for deltaL*, deltaa*, deltab* and deltaE*ab median values amongst the control, Colgate Plax Whitening Blancheur, White Glo 2 in 1, and Plus White.
  
  
  CONCLUSIONS
  None of the 3 commercially available oral rinses resulted in any significant bleaching effect on the teeth over a 21 day treatment period.
authors.affiliation: Faculty of Dentistry, University of the Western Cape, Tygerberg, South Africa. epotgieter@uwc.ac.za
authors.forename: E
authors.initials: E
authors.lastname: Potgieter
authors.forename: S R
authors.initials: SR
authors.lastname: Grobler
mesh_terms: D003124:Colorimetry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D009067:Mouthwashes / Q000627:therapeutic use; D013019:South Africa; D018709:Statistics, Nonparametric; D014073:Tooth Bleaching / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000627:therapeutic use*; D014075:Tooth Discoloration / Q000188:drug therapy; D017211:Treatment Failure
chemical_list: D009067:Mouthwashes; D058205:Tooth Bleaching Agents