title: Efficacy and safety assessment of a new liquid tooth whitening gel containing 5.9% hydrogen peroxide.
abstract: OBJECTIVE
  To evaluate the efficacy and safety of a new 5.9% hydrogen peroxide liquid, invisible gel, (Colgate Simply-White Whitening Gel).
  
  
  METHODS
  A total of 30 subjects were enrolled into the study and divided into two treatment groups (Colgate vs. placebo gel). Efficacy was assessed using VITA shade scores and safety evaluations were performed including the examination of plaque index (PI), bleeding index (BOP), gingival recession and dentin hypersensitivity. Statistical analysis was performed to determine the mean change from baseline.
  
  
  RESULTS
  The new whitening gel containing 5.9% hydrogen peroxide was significantly effective in lightening tooth shade. After only 2 weeks, patients enrolled in the study exhibited an overall mean 4.48-shade improvement from baseline, which was significantly greater than placebo group and far exceeded the ADA minimum requirements to claim "clinical efficacy". In the new Colgate Simply White Clear Whitening Gel group, periodontal health (PI and BOP) improved with time overall. Moreover, dentin hypersensitivity did not significantly increase, and all treatments were generally well tolerated.
  
  
  CONCLUSIONS
  The new Colgate Simply White whitening gel containing 5.9% hydrogen peroxide allowed consistent bleaching using minimal contact time, without adversely impacting overall tolerability.
authors.affiliation: University of Rome La Sapienza, Italy. ggambarini@tin.it
authors.forename: Gianluca
authors.initials: G
authors.lastname: Gambarini
authors.forename: Luca
authors.initials: L
authors.lastname: Testarelli
authors.forename: Massimo
authors.initials: M
authors.lastname: De Luca
authors.forename: Giovanni
authors.initials: G
authors.lastname: Dolci
mesh_terms: D000328:Adult; D045424:Complex Mixtures; D003257:Consumer Product Safety; D003802:Dentifrices / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D006861:Hydrogen Peroxide / Q000627:therapeutic use*; D008875:Middle Aged; D016877:Oxidants / Q000627:therapeutic use*; D010545:Peroxides; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000188:drug therapy
chemical_list: C475021:Colgate Simply White Clear Whitening Gel; D045424:Complex Mixtures; D003802:Dentifrices; D016877:Oxidants; D010545:Peroxides; D006861:Hydrogen Peroxide