Efficacy of mouth rinses and toothpaste on tooth whitening

Abstract

Objectives: People increasingly desire tooth whitening. Considering the wide range of whitening products on the market, this study evaluated the efficacy of whitening toothpastes and mouth rinses compared with the 10% carbamide peroxide (CP) whitening gel. Methods: We obtained 120 cylindrical specimens from bovine teeth, which were darkened for 24 hours in a coffee solution. The color measurement was performed by a spectrophotometer using the C1E L*a*b* system, and specimens were divided into six groups according to the use of the following agents: group 1, conventional fluoridated toothpaste; group 2, Close Up White Now; group 3, Lister- ine Whitening; group 4, Colgate Plax Whitening; group 5, experimental mouth rinse with Plasdone; and group 6, l(Y/( CP Whiteness Perfect. After the simulation of 12 weeks of treatment for groups 1 to 5 and 14 days of treatment for group 6, the specimens were subjected to a new color reading. Results: Data were subjected to one-way analysis of variance (ot=0.05), which showed significant differences among groups after 12 weeks for \E (p=0.0()l). Results of the Tukey test revealed that groups 3, 4, and 6 presented significantly higher color alteration than groups 1, 2, and 5. Conclusions: The whitening toothpaste Close Up White Now and the experimental mouth rinse with Plasdone showed similar color alteration as conventional toothpaste after a 12- week treatment simulation. These groups presented significantly lower color alteration compared with whitening mouth rinses Lister- ine and Colgate Plax Whitening, which showed similar results to those observed after 14 days of bleaching with 10% CP treatment.