Abrasive Oral Care Composition for Polishing and Whitening
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Solution Overview
Problem
Existing oral care compositions using abrasives like calcium pyrophosphate and silica struggle to achieve high gloss or shine of teeth without significantly increasing enamel abrasion.
Innovation Solution
An oral care composition comprising 3-12 weight % calcium pyrophosphate and 10-19 weight % precipitated silica with a pellicle cleaning ratio greater than 85, combined with crunchy silica and other agents, to enhance polishing action while minimizing enamel abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high cleaning silica with pellicle cleaning ratio greater than 85 is used to improve polishing action, then gloss and shine of teeth is improved, but abrasion of tooth enamel increases
Solution Approach 1:
The patent changes the particle size parameter of precipitated silica to a specific range (d10: 2-8 μm, d50: 5-15 μm, d90: 15-30 μm) to optimize the balance between polishing effectiveness and enamel safety. This parameter optimization allows the silica to provide high gloss and shine while controlling abrasion levels.
Solution Approach 2:
The patent creates a composite abrasive system combining precipitated silica with calcium pyrophosphate in specific weight ratios (silica: 10-19%, calcium pyrophosphate: 3-12%). This composite approach leverages the complementary properties of both materials to achieve superior polishing with reduced enamel abrasion compared to using silica alone.
2Shape
If precipitated silica with specific particle size range is used to optimize polishing, then surface smoothness is improved, but cleaning efficiency may be reduced
Solution Approach 1:
The patent optimizes the particle size distribution parameters of precipitated silica (d10: 2-8 μm, d50: 5-15 μm, d90: 15-30 μm) to achieve a balance where finer particles provide surface smoothing and polishing, while the overall distribution maintains adequate cleaning efficiency through the presence of slightly larger particles in the distribution range.
Solution Approach 2:
The composite abrasive system combines precipitated silica with calcium pyrophosphate, where the two materials work synergistically to provide both cleaning and polishing functions. The calcium pyrophosphate complements the silica by contributing to cleaning efficiency while the silica provides surface smoothness.
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 provides improved polishing and whitening of teeth with reduced enamel abrasion, achieving desirable gloss and shine while maintaining effective cleaning.
Implementation Method 1
The use of abrasives in oral care compositions is well established. In addition to cleaning plaque and stains, abrasives in oral care compositions such as dentifrices can also polish the surface of enamel.
Implementation Method 2
Oral care compositions comprising calcium pyrophosphate and silica are known in the art
Data Source
AI summary
The present invention provides an oral care composition comprising from 3 to 12 weight % calcium pyrophosphate and from 10 to 19 weight % precipitated silica, based on the total weight of the composition, wherein the precipitated silica has a pellicle cleaning ratio of greater than 85. The present invention further provides a method of cleaning and/or polishing and/or whitening an oral surface comprising contacting the oral surface with the oral care composition.