Efficacy of non‐hydrogen peroxide mouthrinses on tooth whitening: An in vitro study
Panagiotis Ntovas, Konstantinos Masouras, Panagiotis Lagouvardos
Abstract
Abstract Objectives To evaluate the tooth whitening efficacy of non‐hydrogen peroxide containing mouthrinses. Methods Forty incisors were randomly assigned into four groups. Four whitening mouthrinses, Oral‐B 3D White Luxe/Procter & Gamble (WL), Listerine Advanced White/Johnson & Johnson (AW), Colgate Max White/Colgate (MW), and iWhite Whitening Mouthwash/Sylphar (iW), were used over a four‐week period. Color changes of L *, a *, b *, Δ E * ab , and Δ E 00 , were recorded by a digital spectrophotometer (Spectroshade Micro/Mht), at baseline and intermediate week‐intervals. Data were statistically analyzed using repeated measures ANOVA at α = 0.05. Results The first‐week mean change of L * was 0.76 and significantly different from the baseline for all solutions, without any further changes. Correspondingly, a * decreased by −0.36, while b * increased by 0.48, contributing to a color change of 1.15 Δ E * ab or 0.91 Δ E 00 . No differences were found among the solutions in respect to color‐parameter changes ( p > 0.05). Differences among time intervals were significant ( p < 0.05) and mainly observed between the baseline and the following week‐measurements. There was no statistically significant time‐solution interaction ( p > 0.05). Conclusions Non‐hydrogen peroxide whitening mouthrinses, slightly contribute to tooth whitening, by removing superficial staining, without any further tooth bleaching effect. Clinical significance Non‐hydrogen peroxide containing whitening mouthrinses, despite having a quick initial action, reach their ceiling relatively soon. Their effectiveness is barely perceptible and definitely inferior to other professional tooth bleaching methods. Thus, they can only be considered as a supplementary way of keeping teeth whiter, mainly by preventing recurrent tooth discoloration.