Tooth Whitening via Repeated Low-Concentration Bleaching
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Solution Overview
Problem
Existing tooth whitening methods often result in only average bleaching effects, with potential side effects such as irritation and limited mechanical stability of applied agents, requiring a more effective and safer approach for cosmetic tooth whitening.
Innovation Solution
A method involving the application of a bleaching agent to teeth for 3 to 20 minutes, repeated up to nine times in sessions spaced 4 to 10 days apart, using a bleaching agent composition of 50-96% solvent, 2-30% oxidizing agent, and 2-30% varnish former, with a lip and cheek retainer to enhance whitening and prevent irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If concentrated hydrogen peroxide solution (30 to 37%) is used with heat and light to promote oxidative effects, then teeth whitening effect is improved, but side effects such as irritation of mucous membrane and hypersensitive teeth occur
Solution Approach 1:
The patent changes the concentration parameter of the bleaching agent from high (30-37% hydrogen peroxide) to low (1-10% hydrogen peroxide or carbamide peroxide), and modifies the application time parameter from short with high intensity to extended repeated applications. This parameter transformation allows achieving whitening effect while reducing harmful side effects.
Solution Approach 2:
The patent applies periodic action by repeating the bleaching agent application multiple times (at least once, preferably 1-9 times per session) with intervals between applications. This allows the whitening effect to accumulate gradually while giving tissues time to recover, thereby reducing irritation and hypersensitivity.
2Manufacturing precision
If known bleaching methods are used, then some whitening effect is achieved, but the bleaching effect is only average and requires further improvement
Solution Approach 1:
The patent ensures continuity of useful action by applying the bleaching agent multiple times in succession (1-9 times per session) and conducting multiple sessions (1-3 sessions) with appropriate intervals. This continuous repeated exposure to the bleaching agent accumulates the whitening effect, transforming average results into significant whitening of up to 10 shades.
3Manufacturing precision
If pigmented paints are used to cover discoloration, then discoloration is masked, but mechanical strength is low and reapplication is required every day
Solution Approach 1:
The patent extracts the underlying cause of discoloration (pigments and stains) through chemical oxidation rather than merely covering it with paints. By using bleaching agents that break down pigment molecules, the treatment addresses the root cause, providing permanent whitening without the need for daily reapplication of cosmetic covers.
4Manufacturing precision
If gel-like agents with 22 to 32% carbamide peroxide are applied in a tray, then whitening effect is achieved, but the splint must be worn for at least 6 hours daily
Solution Approach 1:
The patent segments the prolonged single application into multiple shorter applications (3 to 20 minutes each, repeated 1-9 times per session). This segmentation allows the total whitening effect to be achieved through several brief treatments rather than one extended 6-hour wear, significantly reducing the time burden on patients.
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 method achieves significant tooth whitening of up to 10 shades in one or two sessions with known bleaching agents, providing a safer and more effective cosmetic whitening solution without associated periodontitis or caries risks.
Implementation Method 1
A commonly used procedure involves bleaching teeth with concentrated hydrogen peroxide solution (30 to 37%). Heat and light are used to promote the oxidative effects of the peroxide.
Data Source
AI summary
A method for whitening teeth in which (a) a bleaching agent is applied to the surface of the tooth(s) to be whitened, (b) the bleaching agent is left on the tooth for a period of 3 to 30 minutes, (c) the bleaching agent is removed from the tooth surface, (d) steps (a) to (c) are repeated at least once, and a kit is provided to carry out the procedure.