Two-Phase Tooth Whitening With Delayed Light Activation
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Solution Overview
Problem
Existing tooth whitening methods using abrasives and chemical whitening agents like peroxide face limitations in efficacy and cause tooth sensitivity and soft tissue irritation, especially when high concentrations or prolonged exposure are used.
Innovation Solution
A method involving a two-phase treatment where a tooth whitening composition is applied for a delay period followed by light radiation to activate stains, minimizing exposure to light during initial stages to reduce sensitivity and maximize oxidizing agent absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the concentration of peroxide is increased to achieve faster whitening, then whitening efficacy is improved, but tooth sensitivity and soft tissue irritation increase
Solution Approach 1:
The patent applies a delay period before activating the oxidizing agent with light radiation. During this delay period, the oxidizing agent is allowed to penetrate and saturate the tooth structure without immediate activation, maximizing its effectiveness while reducing the required concentration and minimizing sensitivity and irritation.
2Productivity
If peroxide is maintained on the tooth surface for longer contact times to increase whitening, then whitening efficacy is improved, but tooth sensitivity and gingival irritation increase
Solution Approach 1:
The oxidizing agent is applied and allowed to penetrate the tooth structure during a delay period before light activation. This preliminary penetration phase allows the agent to saturate the tooth without immediate chemical activation, reducing the total exposure time needed while maintaining efficacy and minimizing irritation.
Solution Approach 2:
The treatment protocol separates the application phase from the activation phase, with light radiation applied in specific time intervals after the delay period. This periodic action pattern allows the oxidizing agent to work effectively while limiting continuous exposure that would increase sensitivity and irritation.
3Productivity
If high concentration peroxide is used to achieve whitening, then whitening efficacy is improved, but a physical barrier such as rubber dam is required to prevent soft tissue contact
Solution Approach 1:
The patent utilizes light radiation as an activation mechanism for the oxidizing agent, allowing effective whitening at lower peroxide concentrations compared to traditional activation methods. This parameter change in the activation approach enables reduced concentration while maintaining efficacy, eliminating the need for protective barriers and improving ease of use.
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
Enhances tooth whitening efficacy while reducing sensitivity and irritation by limiting light radiation to a portion of the treatment duration, using low-intensity light for activation, and optimizing composition loading.
Implementation Method 1
a method for whitening teeth using light radiation to photochemically activate a tooth stain for enhanced whitening by a bleaching or oxidizing agent
Implementation Method 2
enhanced whitening by a bleaching or oxidizing agent
Data Source
AI summary
In a tooth whitening method, a whitening composition is applied to at least one tooth. The whitening composition is maintained on the at least one tooth for a first time period. After the first time period, a light radiation is directed toward the at least one tooth for a second time period. The first time period has a duration greater than 50% of a total duration of the first and second time periods.