Photopolymerizable Dental Composition Heat Control
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Solution Overview
Problem
Current dental treatments face challenges in effectively isolating tooth substance and protecting surrounding gums from aggressive chemical substances during procedures like acid etching and bleaching, with existing solutions like rubber dam technology being complex, uncomfortable for patients, and prone to application errors, and light-curable methacrylate systems generating excessive heat.
Innovation Solution
A photopolymerizable dental composition based on acrylate/methacrylate systems with molecular weight regulators such as α-terpinene and γ-terpinene, which cure quickly, minimize heat release, and form a homogeneous, elastic protective layer without non-reactive additives or high molecular weight monomers, ensuring effective isolation and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber dam technology is used to isolate tooth substance and protect gums, then protection effectiveness is improved, but device complexity and ease of operation deteriorate due to complex application procedures and sensitivity to errors
Solution Approach 1:
The patent extracts the protective function from the complex rubber dam system and implements it as a standalone light-curable composition that can be applied directly to the gum line, eliminating the need for rubber dam sheets, frames, and hole-punching procedures while maintaining effective isolation and protection
Solution Approach 2:
The patent replaces the mechanical rubber dam system with a photopolymerizable chemical system that cures upon light exposure, substituting mechanical isolation with a chemically-cured protective barrier that is simpler to apply and less sensitive to application errors
2Speed
If light-curable methacrylate systems are used for protective coating, then curing speed is improved, but heat generation worsens causing potential tissue damage
Solution Approach 1:
The patent modifies the photopolymerization parameters by using a specific photoinitiator system and monomer composition that reduces the exothermic reaction intensity while maintaining rapid curing, thereby controlling heat generation to safe levels during light irradiation
Solution Approach 2:
The patent introduces an intermediary substance that mediates the photopolymerization process, allowing the reaction to proceed rapidly while dissipating heat more effectively, thus decoupling curing speed from excessive temperature rise
3Temperature
If high molecular weight monomers are used to reduce heat release, then heat generation is reduced, but manufacturing precision and ease of operation worsen due to incomplete curing and homogeneous structure disruption
Solution Approach 1:
The patent uses a mixture of monomers with different molecular weights, where lower molecular weight monomers ensure complete curing and homogeneous structure formation, while higher molecular weight monomers contribute to heat reduction, creating local optimization of both properties within the same system
4Reliability
If rubber dam is used to protect from aggressive chemicals, then protection is improved, but patient comfort worsens due to compressive tension and inability to close mouth
Solution Approach 1:
The patent extracts only the protective function from the rubber dam system, applying the protective composition directly to the gum line and adjacent areas without requiring the full rubber dam apparatus, thereby maintaining protection while eliminating the compressive tension and mouth-opening requirements
5Ease of operation
If photopolymerizable composition is applied to isolate teeth and protect gums, then ease of operation is improved, but heat generation worsens causing potential burns
Solution Approach 1:
The patent introduces an intermediary photoinitiator system that enables the photopolymerization reaction to proceed at lower energy input, reducing the heat generated during curing while maintaining ease of application and effective protection
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 a quick, heat-controlled curing process, forming a flexible, adhesive, and easily removable protective layer that effectively isolates teeth and gums from dental treatment agents, reducing the risk of irritation and damage while maintaining good mechanical properties.
Implementation Method 1
a photopolymerizable dental composition based on free-radically curable acrylate/methacrylate systems
Implementation Method 2
based on free-radically curable acrylate/methacrylate systems
Data Source
AI summary
A photopolymerizable dental composition for application to, and for isolating and protecting, gums and/or teeth during dental treatment is described, comprising: (a) one or more photopolymerizable monomers selected from the group consisting of acrylates and methacrylates, preferably from the group consisting of methacrylates, (b) one or more photoinitiators, preferably selected from the group consisting of alpha-diketones, benzoinalkyl ethers, thioxanthones, benzophenones, acylphosphine oxides, acetophenones, ketals, titanocenes, borates and sensitizing dyes, (c) one or more molecular weight regulators selected from the group consisting of compounds that can be reacted with a radical of a monomer of component (a) by abstraction of an H radical from the molecular weight regulator to the allyl position, and optionally one or more further additives.Furthermore, the invention relates to a kit comprising such a composition, a method for producing a corresponding protective layer, a cosmetic treatment method for one or more teeth, and a corresponding composition as a covering material.