| 摘要 |
The invention relates to an aqueous tooth whitening substance for application as a thin film to a plurality of adjacent teeth wherein the substance comprises a tooth whitening active; a carboxypolymethylene gelling agent; and a poly(ethylene oxide) resin. <??>The invention further relates to a delivery system for whitening a plurality of adjacent teeth, the delivery system being in the form of a strip of flexible material comprising a poly(ethylene oxide) resin and a tooth whitening active, wherein the overall thickness of the delivery system is less than 1 mm.. <IMAGE>
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