Patent ID: 7862801

Claim:
A kit for bleaching teeth comprising: a dental tray; and a stable one-part dental bleaching composition that is safe for use in an oral cavity of a person's mouth over a time period of at least 1 hour and that is sticky and viscous so as to adhere the dental tray adjacent to a person's teeth during dental bleaching, the dental bleaching composition comprising: a dental bleaching agent selected from the group comprising hydrogen peroxide, carbamide peroxide, sodium perborate, and sodium percarbonate and included in an amount in a range of 1% to 50% by weight of the dental bleaching composition; a liquid carrier component comprising water in an amount of at least 0.1% by weight of the dental bleaching composition and at least one polyol; and polyvinylpyrrolidone having a molecular weight in a range of 1,000,000 to 1,500,000 and included in an amount of 5-40% by weight of the dental bleaching composition so as to form a sticky, viscous aqueous gel when mixed with the liquid carrier component and dental bleaching agent, wherein the polyvinylpyrrolidone promotes adhesion of the dental bleaching composition to tooth enamel without the polyvinylpyrrolidone removing calcium from tooth enamel by chelation, wherein the dental bleaching composition, when used to adhere the dental tray to a person's teeth, has an adhesiveness so as to hold the dental tray against the person's teeth without substantial slippage.