| 摘要 |
Dental bleaching devices (10) in the shape of a dental tray, strip or patch include a barrier layer (18), a dental bleaching composition (28), and a protective adhesive composition (24, 26) that protects a person's gums from the dental bleaching composition during use. The barrier layer (18) protects the bleaching and protective adhesive compositions (24, 26, 28) ftom saliva or moisture during use. The dental bleaching composition is positioned (28) so as to contact a person's tooth surfaces when the bleaching device (10) is in use. The protective adhesive composition (24, 26) is positioned so as to shield a person's gums from the bleaching composition when the bleaching device is in use. The dental bleaching composition (28) and protective adhesive composition (24, 26) can be in the form of a gel or they may be substantially solid. They preferably include a tissue adhesion agent comprising a hydrophilic polymer.
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