Can a bleaching toothpaste containing Blue Covarine demonstrate the same bleaching as conventional techniques? An in vitro, randomized and blinded study

Abstract

Objective The purpose of this in vitro study was to compare the efficacy of a bleaching toothpaste containing Blue Covarine vs. conventional tooth bleaching techniques using peroxides (both in-office and at-home).Material and Methods Samples were randomly distributed into five experimental groups (n=15): C - Control; BC – Bleaching toothpaste containing Blue Covarine; WBC – Bleaching toothpaste without Blue Covarine; HP35 - In-office bleaching using 35% hydrogen peroxide; and CP10 – At-home bleaching with 10% carbamide peroxide. The dental bleaching efficacy was determined by the color difference (ΔE), luminosity (ΔL), green-red axis (Δa), and blue-yellow axis (Δb). The CIELab coordinates were recorded with reflectance spectroscopy at different times: T0 - baseline, T1 – immediately after bleaching, T2 - 7 days, T3 - 14 days, and T4 - 21 days after the end of treatments. Data were analyzed by a repeated measures mixed ANOVA and post hoc Bonferroni test, with a significance level of 5%.Results No significant differences were found between the treatment groups C, BC, and WBC. The groups HP35 and CP10 showed significantly higher whitening efficacy than groups C, BC, and WBC.Conclusions There were no significant differences in the whitening efficacy between a Blue Covarine containing toothpaste, a standard whitening toothpaste, and a control. Neither of the whitening toothpastes tested were as effective as in-office or at-home bleaching treatments.

Whitening toothpaste containing activated charcoal, blue covarine, hydrogen peroxide or microbeads: which one is the most effective?

“…While Collins, et al 9 (2008) and Joiner, et al 10 (2008) have demonstrated immediate, perceptible results that persist for up to 8 hours after a single application of the product, Torres, et al 12 (2013), Dantas. et al 13 (2015), Oliveira, et al 14 (2016), Horn, et al 15 (2014) and Bortolatto, et al 16 (2016) have failed to demonstrate whitening effects superior to that promoted by conventional toothpaste.…”

Effect of whitening toothpastes on color stability of different restorative materials

“…The parameter DE (total color change) for each specimen was recorded as displayed on the computer. A similarity between our current study and other studies is the use of a spectrophotometer for color measurement (Torres et al 2013;Dantas et al 2015). In contrast, other studies evaluated the color alteration by digital images or a colorimeter (Ashcroft et al 2008;Collins et al 2008, Joiner et al 2008aJoiner et al 2008b).…”

Effect of an Optical Whitening Toothpaste on Color Stability of Tooth-Colored Restorative Materials

“…Use of spectrophotometer for this purpose in our study was similar to previous studies. 22,23 However, some other studies measured the change in color by analyzing digital images or use of a colorimeter. 1,18,24,25 In the present study, different toothpastes caused color change in acceptability threshold or out of acceptability threshold after 90 days (Z350 showed perceivable color change after brushing with the conventional toothpaste for 90 days and Z250 showed perceivable color change after brushing with the whitening toothpaste for 90 days).…”