title: An in vitro comparison of different bleaching agents in the discolored tooth.
abstract: Extracted teeth with intact crowns were stained to compare and evaluate the effectiveness of four bleaching agent combinations. Forty-two permanent and 12 deciduous teeth were used. The bleaching agents were placed into coronal pulp chambers and then evaluated and rated at 1-, 3-, 7-, and 14-day and 6-month intervals. New sodium perborate combined with fresh Superoxol was the most effective bleaching agent with 93% success (the final shade was as light as the prestained shade). New sodium perborate and 1-yr-old Superoxol was 73% successful. New sodium perborate with distilled water and old sodium perborate with distilled water were both 53% successful. Deciduous teeth demonstrated a response to bleaching agents similar to that of permanent teeth. Color regression after 6 months was found in 4% of the cases. When it occurred, the degree of color regression was minimal.
authors.forename: S
authors.initials: S
authors.lastname: Ho
authors.forename: A C
authors.initials: AC
authors.lastname: Goerig
mesh_terms: D001881:Borates; D006801:Humans; D006861:Hydrogen Peroxide; D013997:Time Factors; D014073:Tooth Bleaching / Q000379:methods*
chemical_list: D001881:Borates; D006861:Hydrogen Peroxide; C027707:sodium perborate