Jammed Emulsion for Controlled Peroxide Delivery
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Solution Overview
Problem
High concentrations of peroxide compounds used in teeth whitening products often cause tooth sensitivity and gum irritation due to dehydration and rapid interaction with tooth surfaces, limiting the effectiveness and tolerability of whitening processes.
Innovation Solution
A jammed oil-in-water emulsion composition with a high internal phase ratio, where a continuous aqueous phase surrounds discrete hydrophobic regions, allowing for controlled and sustained delivery of bleaching agents like hydrogen peroxide, reducing irritation and enhancing whitening performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high concentrations of peroxide compounds are used in teeth whitening products, then whitening speed and effectiveness are improved, but tooth sensitivity and gum irritation increase due to dehydration and rapid interaction with tooth surfaces
Solution Approach 1:
The peroxide compound is segmented into discrete hydrophobic droplets dispersed within a continuous aqueous gel phase. This segmentation controls the release and interaction of peroxide with tooth surfaces, reducing rapid dehydration effects while maintaining effective whitening concentrations.
Solution Approach 2:
The aqueous gel phase acts as an intermediary medium between the peroxide compound and the tooth surface. This intermediary controls the delivery rate of peroxide, preventing direct rapid contact that causes sensitivity and irritation while still achieving effective whitening.
2Stability of the object's composition
If high viscosity gel compositions based on hydrogen peroxide are used, then retention in bleaching trays and adhesiveness to tooth surface are improved, but dehydration of teeth surface occurs and whitening process slows down with increased sensitivity
Solution Approach 1:
The composition combines a hydrophobic peroxide phase with a hydrophilic aqueous gel phase containing carboxypolymethylene compounds to create a composite emulsion system. This composite structure provides retention and adhesiveness through the gel phase while the hydrophobic droplets control peroxide release to prevent dehydration.
3Object-affected harmful factors
If hydrophilic phase in hydrophobic phase emulsion is used, then dehydration of teeth surface is mitigated and tooth sensitivity is reduced, but whitening potential is limited by the concentration in aqueous droplets
Solution Approach 1:
The emulsion structure is inverted from the conventional hydrophilic-in-hydrophobic type to a hydrophobic-in-hydrophilic type. The peroxide compound is dispersed as hydrophobic droplets within a continuous hydrophilic aqueous gel phase, reversing the traditional structure to achieve both reduced sensitivity and enhanced whitening performance.
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 composition effectively whitens teeth with reduced side effects by maintaining a stable emulsion structure that ensures slow and continuous delivery of bleaching agents, minimizing tooth sensitivity and gum irritation while maintaining high whitening performance.
Implementation Method 1
allowing the hydrogen peroxide to rapidly migrate to the hydrophilic tooth surface
Implementation Method 2
hydrophobic phase in hydrophilic phase (i.e. oil-in-water) emulsion compositions
Data Source
AI summary
An oral care composition with an aqueous phase, hydrophobic phase, active agent, and optionally emulsifier. A jammed emulsion with aqueous phase, hydrophobic phase, active agent, and optionally emulsifier. An oral care composition with aqueous phase, hydrophobic phase, active agent, and optionally emulsifier. Methods of using disclosed compositions for active agent delivery.