| 摘要 |
We have, surprisingly, discovered a "multi-stage" whitening procedure for teeth, in which several new and different types of whitening and stain weakening agents are used consecutively, together resulting in superior and improved whitening performance (up till full white teeth), and this under conditions of tremendously reduced levels of chemical exposure to teeth, as when compared with traditional whitening procedures based on the use of peroxides. In particular we have discovered that the tannase enzyme as well as dioxiranes effectively can whiten teeth; that the whitening performance of the papain enzyme can be enhanced substantially in the presence of selected co-ingredients; and that a pre-treatment with a laccase enzyme enhances the whitening performance of an oxidation chemical in a subsequent bleaching step. These new procedures provide both, improved and unmatched whitening performance, and this under conditions of improved and unmatched safety standards.
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