Bleaching device comprising a barrier layer and a bleaching composition comprising polyvinylpyrrolidone

  • US 7,128,899 B2
  • Filed: 11/17/2003
  • Issued: 10/31/2006
  • Est. Priority Date: 01/27/2001
  • Status: Expired due to Term
First Claim
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1. A delivery system for delivering a dental bleaching composition to teeth while reducing calcium removal from tooth enamel when the dental bleaching composition contacts tooth enamel, comprising:

  • a water-resistant barrier layer; and

    a dental bleaching composition adjacent to said barrier layer, said bleaching composition being adapted for adhering the water-resistant barrier layer to a person'"'"'s teeth during dental bleaching and comprising;

    a dental bleaching agent; and

    polyvinylpyrrolidone as primary or sole thickening agent such that the thickening agent promotes adhesion of the dental bleaching composition to tooth enamel without the thickening agent removing calcium from tooth enamel by chelation.

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