Peroxide Gel Composition

What is this patent about?

’582 is related to the field of dental bleaching compositions and, more specifically, to a conformable dental treatment tray that delivers a peroxide-based bleaching agent. Traditional methods involve liquid or gel-based bleaching agents applied directly to the teeth or held in place by custom-fitted or generic trays. These methods often suffer from issues like run-off, dilution by saliva, messiness, and difficulty in achieving uniform contact with the teeth, especially in individuals with uneven dental arches.

The underlying idea behind ’582 is to create a pre-mixed, shelf-stable, formable dental treatment tray that overcomes the limitations of existing bleaching methods. This is achieved by using a specific polymer, either poly(2-ethyl-2-oxazoline) or polyvinylpyrrolidone (PVP) , as a thickening agent in a peroxide-based dental composition. The composition is then dried to a gelatinous, visco-elastic state on a flexible backing strip, allowing it to be easily packaged, stored, and later hydrated and molded directly onto the user's teeth.

The claims of ’582 focus on a dental bleaching device comprising a flexible, planar backing strip with a dental composition applied to one side. This composition includes a peroxide bleaching agent, a solvent, and a thickening agent, specifically either poly(2-ethyl-2-oxazoline) or polyvinylpyrrolidone (PVP). Crucially, the composition is dried to a non-fluid state, resulting in a gelatinous, non-coalescent, and visco-elastic material that conforms to the user's dental arch without cracking or breaking.

In practice, the user wets the dried dental composition, which rehydrates and becomes adhesive. The user then presses the strip against their teeth, and the visco-elastic properties of the composition, combined with the flexibility of the backing strip, allow it to mold to the unique contours of their dental arch. This ensures close contact between the bleaching agent and the teeth, even in areas with irregularities. The dried, gelatinous state of the composition also minimizes mess and prevents the bleaching agent from being easily diluted or washed away by saliva.

This approach differs from prior solutions that rely on liquid or gel-based bleaching agents, which are prone to run-off and uneven application. It also improves upon rigid or solidified treatment compositions, which can crack or break when flexed. By using poly(2-ethyl-2-oxazoline) or PVP as a thickening agent, the invention achieves a balance of stability, flexibility, and adhesiveness, resulting in a customizable and effective dental bleaching experience .