Dental Composition Using Condensed Aromatic Compounds
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Solution Overview
Problem
Conventional dental compositions that rely on bisphenol-A based materials, such as bis-GMA, pose health risks due to bisphenol-A's endocrine disrupting properties, necessitating the development of alternatives that provide superior mechanical properties, refractive index, and viscosity without using bisphenol-A or its derivatives.
Innovation Solution
A dental composition comprising polymerizable compounds of specific formulas (I), (II), and (III) that do not require bis-GMA or bisphenol-A, utilizing compounds with 2 to 4 polymerizable groups for crosslinking in radical polymerization, and incorporating a process involving addition reactions with epichlorohydrine, ethylene carbonate, or isocyanate compounds to achieve desired properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bis-GMA or bisphenol-A based materials are used in dental compositions, then mechanical properties, refractive index, and viscosity are improved, but health risks increase due to endocrine disrupting properties
Solution Approach 1:
The patent changes the chemical structure parameters by replacing bisphenol-A based monomers with alternative polymerizable monomers that have different molecular structures but similar functional properties, thereby eliminating the harmful endocrine disrupting properties while maintaining the desired mechanical properties, refractive index, and viscosity
Solution Approach 2:
The patent employs composite dental compositions that combine multiple polymerizable monomers with different functional groups (carboxylic acid, hydroxyl, amino, ether, ester groups) to achieve the desired balance of mechanical properties, refractive index, and viscosity without using harmful bisphenol-A based materials
2Stability of the object's composition
If bis-GMA is used to reduce polymerization shrinkage, then dimensional stability is improved, but harmful leaching of bisphenol-A occurs
Solution Approach 1:
The patent extracts and removes the harmful bisphenol-A component from the dental composition while retaining the beneficial functional properties by using alternative monomers that do not contain bisphenol-A structure, thereby preventing leaching while maintaining dimensional stability
Solution Approach 2:
The patent changes the chemical composition parameters by selecting monomers with specific functional groups and molecular weights that provide dimensional stability equivalent to or better than bis-GMA, without the associated health risks
3Strength
If conventional polymerizable resins are used, then superior mechanical properties are achieved, but endocrine disruption occurs
Solution Approach 1:
The patent systematically changes the chemical structure parameters of the polymerizable monomers by selecting compounds with specific functional groups (carboxylic acid, hydroxyl, amino, ether, ester) and molecular structures that provide superior mechanical properties while being free from endocrine disrupting bisphenol-A moieties
Solution Approach 2:
The patent converts the limitation of avoiding bisphenol-A into a benefit by developing alternative monomer systems that not only eliminate endocrine disruption but also provide equal or superior mechanical properties, thereby turning a restrictive requirement into a competitive advantage
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 solution provides dental compositions with superior mechanical properties, refractive index, and viscosity without the health risks associated with bisphenol-A, ensuring safer use for both patients and dentists while maintaining performance.
Implementation Method 1
utilizing compounds with 2 to 4 polymerizable groups for crosslinking in radical polymerization
Implementation Method 2
incorporating a process involving addition reactions with epichlorohydrine, ethylene carbonate, or isocyanate compounds to achieve desired properties
Data Source
AI summary
The present invention provides a dental composition comprising a polymerizable compound of the following formula (I), (II) and/or formula (III): wherein R1, R2, R3, R4, R5, R6, R7, and R8, and, if present, R9, and R10 are as defined by the claims.