Abstract
Objectives : To compare the stain removal and prevention efficacy of a whitening toothpaste (White System) and a standard silica toothpaste and to determine if any increase in tooth whitening benefits caused an increase in enamel abrasive wear. Methods : The products were evaluated in a laboratory-cleaning test and in a clinical study evaluating the removal and prevention of natural extrinsic stain over a four-week period. Enamel abrasive wear was determined using an in situ model where enamel blocks were placed on a denture worn in the mouth for four weeks and brushed twice daily. Results : The White System gave a statistically ( p <0.001) higher level of in vitro stain removal as compared to the standard silica toothpaste. The White System was significantly superior to the standard silica toothpaste in the clinical study in terms of extrinsic stain removal ( p <0.03) and prevention ( p <0.02). The product difference in the in situ enamel wear for these two toothpastes was not of statistical significance. Conclusions : The White System toothpaste was shown to be more effective in stain removal and prevention than a standard silica toothpaste. These enhanced tooth-whitening benefits did not give rise to a concomitant statistically significant increase in the level of wear to enamel.
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