Fluoride Oral Care Composition Using Web Separation for Ion Stability
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Solution Overview
Problem
Fluoride ions in dentifrice compositions are difficult to incorporate due to reactivity with other components, leading to altered bioavailability and reduced efficacy, necessitating a formulation that minimizes interactions between fluoride ions and other ingredients.
Innovation Solution
The use of nonwoven web layers to physically separate fluoride ions from calcium ions or abrasives, ensuring they are in different locations within the oral care composition, thereby reducing reactivity and enhancing fluoride ion uptake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoride ion sources are incorporated into dentifrice compositions, then anti-caries benefits are delivered, but reactivity with other components (calcium ions, abrasives, chelants) alters fluoride bioavailability and reduces efficacy
Solution Approach 1:
The dentifrice composition is divided into distinct functional zones or phases where fluoride ion sources are segregated from reactive components such as calcium ions and abrasives. This spatial segmentation prevents unwanted chemical interactions while maintaining individual component functionalities, thereby preserving fluoride bioavailability and anti-caries efficacy.
Solution Approach 2:
An intermediary substance or matrix is introduced to separate fluoride ion sources from reactive dentifrice components. This intermediary acts as a buffer or protective medium that allows fluoride ions to remain stable during storage while still being released and absorbed by tooth enamel during oral use, thus resolving the contradiction between stability and efficacy.
2Reliability
If fluoride ions are kept separate from other reactive components, then fluoride bioavailability is maintained, but formulation complexity increases
Solution Approach 1:
A universal carrier matrix or delivery system is developed that simultaneously performs multiple functions: it holds fluoride ion sources, prevents their interaction with reactive components, controls their release rate, and maintains compatibility with other dentifrice ingredients. This multi-functional approach simplifies the overall formulation while preserving fluoride availability.
Solution Approach 2:
A composite dentifrice formulation is created where fluoride ion sources are embedded within a compatible matrix material that provides both structural integrity and chemical protection. The composite structure allows simple processing and application while internally maintaining the separation needed for fluoride stability and bioavailability.
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
This approach maintains fluoride ion availability by minimizing chemical interactions, resulting in higher fluoride uptake and improved dental enamel protection.
Implementation Method 1
The interaction of fluoride with the mineral component of teeth (known as hydroxyapatite or HAP) produces a fluorohydroxyapatite (FAP) mineral, through the substitution of OH− in HAP with F−. Fluoride incorporation into the dental enamel as FAP results in increased hydrogen bonding, a denser crystal lattice, and an overall decrease in the solubility of dental enamel.
Data Source
AI summary
Oral care compositions and/or unit-dose oral care compositions with a fluoride ion source. Oral care compositions and/or unit-dose oral care compositions with a high average fluoride ion uptake. Oral care compositions with one or more web forming materials, a calcium ion source, and a fluoride ion source with a high average fluoride uptake.