| 摘要 |
The present invention provides a method of whitening a person's teeth comprising treating the teeth with a whitening dentifrice and subsequently, but within a ten minute period thereafter, applying a self- supporting film of liquid bleaching product to said teeth, for a bleaching period of at least five minutes, preferably overnight. At the end of the bleaching period the whitening dentifrice can be used to remove residual bleaching product and the whole process repeated. The whitening dentifrice comprises a surface stain remover, selected from water-soluble polyphosphates, phosphonate polymers and dental abrasives having an RDA value greater than 120, which enhances the whitening effect. The bleaching product comprises a tooth bleaching agent and a liquid carrier and has a viscosity of less than 1000 mPa.s at a shear rate of 10s-1 and a temperature of 25°C.Kits comprising the whitening dentifrice and the liquid bleaching product are also provided. The methods and kits herein provide for an improved tooth whitening effect for home usage.
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