A multi-film delivery system for a multi-component tooth whitening, desensitization and remineralization composition is disclosed which comprises a first orally dissolvable film made of a liquid-soluble or liquid dispersible polymer system containing a peroxide activation compound or complex and desensitizing agents and/or remineralizing agents and/or anti-inflammatory agents, and a separate second undissolvable film containing a tooth whitening peroxide compound, such as hydrogen peroxide or carbamide peroxide, stabilizers and thickeners, and/or desensitizing agents and/or remineralizing agents and/or anti-inflammatory agents, which, when applied together on teeth surfaces, the peroxide activation compound/complex on the first film activates the peroxide compound on the second film, and accelerates the release of active bleaching radicals for accelerated whitening action. The first and second films are maintained separate from one another until application. The first orally dissolvable film is placed on a surface of the tooth, then immediately hydrates thereby becoming gelatinous upon contact with saliva, and initiates its adhesiveness, the second undissolvable film is then placed on top of the first orally dissolvable film, the peroxide activation compound/complex on the first film reacts with the tooth whitening peroxygen compound on the second film and accelerates the release of active bleaching radicals for rapid whitening action. The dissolution of the first dissolvable film is controlled by interaction with the fluid or liquid contained in the whitening composition on the second undissolvable film.
