Oral Care Composition Viscosity and Adhesion
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Solution Overview
Problem
Current treatments for dental hypersensitivity, such as nerve-depolarizing agents and occluding agents, have limitations in effectively mitigating tooth sensitivity, necessitating the development of new compositions that can provide long-lasting relief and improved adhesion to teeth surfaces.
Innovation Solution
An oral composition comprising a mixture of hydrated silica, potassium citrate, calcium hydroxyapatite, xanthan gum, and a polymeric deposition aid based on a copolymer of methyl vinyl ether and maleic anhydride, which maintains viscosity for extended periods and adheres well to teeth, reducing sensitivity through multiple active agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If occluding agents are used to physically block dentinal tubules, then sensitivity relief is achieved, but adhesion to teeth surface deteriorates over time
Solution Approach 1:
The patent combines multiple active agents (hydrated silica, potassium citrate, calcium hydroxyapatite) with polymeric deposition aids and thickening agents to create a composite composition that achieves both sensitivity relief and prolonged adhesion. The composite nature allows synergistic effects where each component contributes to either occlusion or adhesion properties.
Solution Approach 2:
The polymeric deposition aid acts as an intermediary substance that facilitates the attachment of active agents to the teeth surface. This mediator enables the occluding agents to adhere properly to dentinal tubules while maintaining their blocking function, thus resolving the contradiction between sensitivity relief and adhesion duration.
2Duration of action of stationary object
If viscosity is increased to improve adhesion, then application ease deteriorates due to difficulty in spreading
Solution Approach 1:
The patent optimizes the viscosity parameter to a specific range (10-60 Pa.s) that balances adhesion duration and application ease. By carefully controlling viscosity through the selection and concentration of polymeric thickening agents, the composition achieves prolonged adhesion without becoming too thick to spread effectively.
Solution Approach 2:
The composition exhibits different rheological properties at different stages of application: during application, the viscosity is low enough for easy spreading, but once applied, the viscosity increases to maintain adhesion. This local quality variation in viscosity over time resolves the contradiction between adhesion duration and application ease.
3Reliability
If multiple active agents are combined to enhance sensitivity relief, then composition complexity increases
Solution Approach 1:
The patent merges multiple active agents (hydrated silica, potassium citrate, calcium hydroxyapatite) into a single unified composition that works synergistically. This combining approach enhances sensitivity relief while managing complexity through integrated formulation rather than separate applications.
Solution Approach 2:
The polymeric deposition aid serves multiple functions simultaneously: it acts as a thickening agent to control viscosity, a binding agent to improve adhesion, and a delivery system for the active agents. This multi-functionality reduces the need for separate components, thereby managing composition complexity while maintaining enhanced sensitivity relief.
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 mitigates tooth sensitivity by maintaining adhesion to the teeth surface for longer periods, providing sustained relief and improved application ease, as demonstrated by its ability to adhere better and remain effective compared to comparative examples.
Implementation Method 1
a polymeric deposition aid based on a copolymer of methyl vinyl ether and maleic anhydride, which maintains viscosity for extended periods and adheres well to teeth
Implementation Method 2
the composition having a viscosity 3 weeks from manufacture or longer of from 10 to 60 Pa.s (10,000-60,000 cP) at 25°C
Implementation Method 3
occluding agents, function by physically blocking the exposed ends of the dentinal tubules, thereby reducing dentinal fluid movement
Data Source
AI summary
An oral care composition comprising a sensitivity mitigating agent, a polymeric deposition aid, the composition having a viscosity 3 weeks from manufacture or longer of from 10,000 to 60,000 cps at 25°C.