Effect of ozone and Tooth Mousse on the efficacy of peroxide bleaching

The aim of this in vitro study was to investigate the effect of Tooth Mousse and ozone on the bleaching effectiveness of peroxide (P).

Sixty enamel specimens were stained by tea infusion. P (8% carbamide peroxide solution) and the P/TM (50:50) blend were prepared freshly as required. The specimens were divided randomly into six groups: Group A - ozone followed by P; Group B - ozone concurrently with P; Group C - P alone; Group D - ozone followed by P/TM; Group E - ozone concurrently with P/TM; and Group F - P/TM alone. Ozone exposure was of 40 seconds duration. Digital photographic images were recorded at baseline and endpoint under standardized lighting and desiccation conditions. CIELAB L*a*b* values were determined.

The addition of TM to P or the application of ozone with P did not significantly affect bleaching effectiveness compared with P alone. The application of ozone prior to P significantly decreased bleaching effectiveness as indicated by the DeltaL*, Deltaa*, DeltaE and %L* values. The addition of TM to the P did enhance the aesthetic by increasing the lustre and translucency of the treated enamel.

The results of this study suggest that Tooth Mousse may be applied concurrently with the bleach, and not reduce bleaching effectiveness.