Dental bleaching compositions having long-term rheological stability and devices, kits and methods that utilize such compositions

A dental bleaching for use in bleaching a person's teeth, comprising:

• a peroxide dental bleaching agent included in amount so as to provide a minimum of about 5% by weight hydrogen peroxide;
• a tissue adhesion agent comprising at least one of polyvinyl pyrrolidone (PVP) and/or polyethylene oxide (PEO) having a minimum molecular weight of about 500,000 and included in a minimum amount of about 15% by weight;
• a rheology-modifying agent comprising at least one of fumed silica or fumed alumina and included in a range of about 1% to about 8.5% so as to decrease or eliminate stringiness compared to a composition comprising the tissue adhesion agent in the absence of the rheology-modifying agent;
• and
• an aqueous liquid carrier that includes water and polyol into which the dental bleaching agent, tissue adhesion agent, and rheology-modifying agent are dispersed, wherein the tissue adhesion agent, the polyol, and the rheology-modifying agent have a combined concentration that exceeds the concentration of the water so that the dental bleaching composition has an internal cohesion and yield stress such that it can be placed onto a barrier layer without forming multiple strings of the composition and so that it will remain where placed on the barrier layer.

A dental bleaching composition for use in bleaching a person's teeth having improved adhesiveness and reduced stringiness, comprising:

• a peroxide dental bleaching agent included in amount so as to provide a minimum of about 10% by weight hydrogen peroxide;
• a tissue adhesion agent comprising carboxypolymethylene included in a minimum amount of about 3% by weight;
• a rheology-modifying agent comprising at least one of fumed silica or fumed alumina and included in a range of about 1% to about 8.5% so as to increase long-term rheological stability over time compared to a composition comprising the tissue adhesion agent in the presence of the peroxide dental bleaching agent and in the absence of the rheology-modifying agent;
• and
• an aqueous liquid carrier that includes water and polyol into which the dental bleaching agent, tissue adhesion agent, and rheology-modifying agent are dispersed, wherein the tissue adhesion agent, the polyol, and the rheology-modifying agent have a combined concentration that exceeds the concentration of the water so that the dental bleaching composition has long-term rheological stability and retains the consistency of a sticky and adhesive gel for a period of at least 3 months.

A dental bleaching composition for use in bleaching a person's teeth having improved adhesiveness and reduced stringiness, comprising:

• an aqueous peroxide dental bleaching agent included in amount so as to provide about 5% or more by weight hydrogen peroxide;
• a tissue adhesion agent, said tissue adhesion agent comprising at least one of:
• polyvinyl pyrrolidone (PVP) and/or polyethylene oxide (PEO) having a molecular weight greater than about 500,000 and included in a minimum amount of about 5% by weight;
• or
• carboxypolymethylene included in a minimum amount of about 3% by weight;
• a rheology-modifying agent comprising a finely divided inorganic particulate that is stable in the presence of the dental bleaching agent and included in a maximum amount of about 8.5% so as to increase long-term rheological stability over time compared to a composition comprising the tissue adhesion agent in the presence of the peroxide dental bleaching agent and in the absence of the rheology-modifying agent;
• and
• an aqueous liquid carrier that includes water and polyol into which the dental bleaching agent, tissue adhesion agent, and rheology-modifying agent are dispersed, wherein the aqueous liquid carrier is free of ethanol and the tissue adhesion agent, the polyol, and the rheology-modifying agent have a combined concentration that exceeds the concentration of the water so that the dental bleaching composition has long-term rheological stability and retains the consistency of a sticky and adhesive gel for a period of at least 3 months.