The whitening effect of chlorine dioxide—An in vitro study

L* for ClO2 specimens was significantly higher only after the first 2 min cycle (p < 0.001) while for H2O2 specimens, L* significantly increased after the first two cycles (p < 0.001) and continued to increase, at a slower rate, until the end of the treatment cycles. ΔE was significantly greater within H2O2 than within ClO2 specimens (p < 0.001). Chlorine dioxide whitens teeth at a faster rate than hydrogen peroxide. Specimens treated with chlorine dioxide were significantly lighter than those treated with hydrogen peroxide at the end of the first 2 min application cycle, however, extended exposures did not enhance colour.

Source: http://www.dentapress.com/headlines/5214-the-whitening-effect-of-chlorine-dioxide%e2%80%94an-in-vitro-study.html

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