Influence of surfactants on the effectiveness of bleaching gels.
This study evaluated the influence of surfactants on the effectiveness of 35% hydrogen peroxide (HP) and 10% carbamide peroxide (CP) bleaching gels. One hundred and forty bovine teeth were used, which were stained by immersion in a coffee, red wine, and tobacco mixture for 7 days. At the end of this process, the color measurement at baseline was taken with the Vita Easyshade spectrophotometer. The teeth were divided into seven groups: (a) negative control (NC), (b) positive control for HP (PC-35), (c) HP + Tween 20 (T20-35), (d) HP + laurel sodium sulfate (LSS-35), (e) positive control for CP (PC-10), (f) CP + Tween 20 (T20-10), and (g) CP + laurel sodium sulfate (LSS-10). Group NC was kept in artificial saliva for 21 days. Groups PC-35, T20-35, and LSS 35 received three applications of bleaching gel for 10 min; the process was repeated after 7 days. Groups PC-10, T20-10, and LSS-10 received the gel for 8 h per day for 14 days. After the bleaching process, the final color was measured. The analysis of variance and Tukey tests showed statistically significant differences for the parameters of ∆L, ∆b, and ∆E of the HP gels with surfactant and positive control group (PC-35). Within the limits of this in vitro study, the addition of surfactants to HP bleaching gel increased the bleaching effectiveness.
Caneppele
Taciana Marco Ferraz
TM
Department of Restorative Dentistry, São Paulo State University São José dos Campos School of Dentistry-UNESP-Brazil, R. das Arraias, 80-sl.26, São José dos Campos, SP, Brazil CEP-12246-330. tacileo@uol.com.br
Torres
Carlos Rocha Gomes
CR
D000818:Animals; D000077463:Carbamide Peroxide; D002417:Cattle; D004357:Drug Synergism; D005782:Gels / Q000494:pharmacology; D006861:Hydrogen Peroxide / Q000494:pharmacology; D010545:Peroxides / Q000494:pharmacology; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology; D013501:Surface-Active Agents / Q000494:pharmacology*; D014073:Tooth Bleaching / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000494:pharmacology*; D014075:Tooth Discoloration / Q000628:therapy*; D014508:Urea / Q000031:analogs & derivatives / Q000494:pharmacology
D005782:Gels; D010545:Peroxides; D013501:Surface-Active Agents; D058205:Tooth Bleaching Agents; D000077463:Carbamide Peroxide; D012967:Sodium Dodecyl Sulfate; D014508:Urea; D006861:Hydrogen Peroxide