Patent ID: 6312670
Filing Date: 2001-11-06
Classification: A61K,A61Q

Abstract:
A method for bleaching the teeth of a subject comprising:providing a multi-chamber vessel, the vessel including a first chamber having a first formulation including a hydrogen peroxide precursor compound selected from the group consisting of an alkali metal percarbonate, carbamide peroxide, calcium peroxide, and an alkali metal perborate, a thickener, a carrier and a calcium chelating agent wherein the first formulation is substantially free of an alkaline pH adjusting agent and is substantially free of water anda second chamber having a second formulation including an alkaline pH adjusting agent selected from the group consisting of alkali metal hydroxides, ammonium hydroxide, alkali metal carbonates, TRIS, and triethanolamine, a carrier and a thickener wherein the second formulation is substantially free of the hydrogen peroxide precursor compound;applying pressure to the multi-chamber vessel, so as to force the first and second formulations through a mixing baffle to form a mixture which then emerges from a single exit, the mixture being a thickened, aqueous, hydrogen peroxide containing composition and being bicarbonate free and abrasive free and having a pH of between approximately 6 and approximately 10; andcontacting the mixture to the teeth of the subject for less than one hour.