Polymer-Dye Complex for Light-Activated Tooth Whitening
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Solution Overview
Problem
Current tooth whitening compositions rely on bleaching agents or optical methods that do not provide enhanced whitening effects, and existing dye-based compositions do not effectively utilize light activation for improved tooth whitening.
Innovation Solution
A novel polymer is developed by tagging photosensitive xanthene dyes such as Acid Red 52, Acid Red 289, or Eosin to a polyether chain, which, when exposed to light, activates the dye to produce reactive oxygen species that break down stains on teeth, resulting in enhanced whitening without bleaching agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bleaching agents are used in tooth whitening compositions, then tooth whitening effect is achieved, but sensitivity and harmful effects increase
Solution Approach 1:
The patent extracts and removes the harmful bleaching agents (hydrogen peroxide, carbamide peroxide) from the tooth whitening composition while retaining the whitening effect through alternative mechanisms. The formulation eliminates peroxide-based agents that cause sensitivity and harmful effects, replacing them with a polymer-dye complex that achieves whitening without these harmful components.
Solution Approach 2:
The patent introduces a polymer-dye complex as an intermediary substance that mediates the whitening process. This complex consists of a water-soluble polymer chain with attached photosensitive dye molecules that act as the active whitening agents, replacing the direct use of harsh bleaching chemicals while maintaining effective stain removal and tooth whitening.
2Object-affected harmful factors
If optical methods are used for tooth whitening, then whitening is achieved without bleaching agents, but enhanced whitening effect is not provided
Solution Approach 1:
The patent changes the key parameter of light activation by using photosensitive dyes with specific absorption characteristics. The dye molecules are selected and positioned to absorb specific wavelengths of light, enabling activation by common light sources such as LEDs or fluorescent lights. This parameter change allows the system to achieve enhanced whitening effects through optimized optical parameters rather than relying on bleaching chemistry.
3Reliability
If dyes are tagged to polymers for light activation, then enhanced whitening is achieved, but composition complexity increases
Solution Approach 1:
The patent merges the dye molecules directly onto the polymer chain structure, creating a single integrated polymer-dye complex rather than separate components. This combining approach simplifies the overall composition structure by eliminating the need for separate dye and polymer formulations, while maintaining the enhanced whitening effect through the synergistic interaction of the attached dye groups.
Solution Approach 2:
The water-soluble polymer serves multiple functions simultaneously: it acts as the carrier matrix, provides light activation capability through attached photosensitive dyes, ensures biocompatibility and safety through its water-soluble nature, and enables effective stain removal. This multi-functionality reduces the need for multiple separate components, thereby simplifying the overall composition despite the integrated dye-polymer structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polymer composition achieves superior tooth whitening, as measured by the Whiteness Index Observed (WIO), with visible light exposure leading to significant stain removal and improved tooth appearance, offering a non-bleaching, effective, and minimally sensitive method.
Implementation Method 1
when exposed to light, activates the dye to produce reactive oxygen species that break down stains on teeth
Data Source
AI summary
The present invention relates to a novel polymer for use in an oral care composition for whitening teeth. The invention also relates to a process to prepare the polymer and a kit that contains the composition and a source of light. The polymer is characterized by including a xanthene dye moiety attached therein.