Single-Component Dental Adhesive Composition for Stable Resin Bonding

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Solution Overview

Problem

Existing dental compositions require separate primers and bonding materials to achieve adhesion and storage stability, lacking a single-component solution that combines both functionalities effectively.

Innovation Solution

A dental composition comprising (meth)acrylate, a photopolymerization initiator with a diaryliodonium salt, a thiourea derivative, a water miscible organic solvent, and water, which enhances adhesion and storage stability when used as both primers and bonding materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate primers and bonding materials are used to achieve adhesion and storage stability, then adhesion performance is improved, but device complexity and number of components increase

Engineering Contradiction:

Improveadhesion performanceVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the functions of separate primers and bonding materials into a single integrated dental composition. This single composition contains all necessary components: (meth)acrylate monomers for polymerization, photopolymerization initiator for curing, thiourea derivative for adhesion promotion, water-miscible organic solvent for stability, and water as base. This merging eliminates the need for multiple separate applications while maintaining both adhesion performance and storage stability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single-component dental composition is designed to perform multiple functions simultaneously: it acts as both a primer (preparing the tooth surface) and a bonding material (forming the adhesive bond). The composition contains thiourea derivatives that provide adhesion promotion capabilities while also containing photopolymerization initiators and monomers for forming a stable bonded structure, making it universally applicable for both primer and bonding purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If a single-component dental composition is used for both primers and bonding materials, then ease of operation is improved, but adhesion performance and storage stability deteriorate

Engineering Contradiction:

Improvesimplicity of applicationVSAvoidadhesion and storage stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent carefully controls the parameters of the single-component composition to achieve both simplicity and performance. The composition uses specific ratios of water-miscible organic solvent to water, controlled concentrations of thiourea derivatives (0.01-5 wt%), and appropriate photopolymerization initiator levels. These parameter optimizations ensure that the composition remains stable during storage yet achieves strong adhesion when applied, resolving the contradiction between ease of operation and adhesion performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The single-component dental composition is essentially a composite material containing multiple functional components working together: (meth)acrylate monomers for polymer network formation, photopolymerization initiators for curing activation, thiourea derivatives for adhesion enhancement, and water-miscible organic solvents for stability. This composite structure allows the material to exhibit multiple properties simultaneously, achieving both ease of operation and high reliability.

Inventive Principle:

Principle #40Composite materials

3Reliability

If diaryliodonium salt is used as photopolymerization initiator, then adhesion and storage stability are improved, but manufacturing complexity increases

Engineering Contradiction:

Improveadhesion and storage stabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent specifies optimal concentration ranges for diaryliodonium salt photopolymerization initiators (0.01-5 wt%) to achieve the best balance between adhesion performance, storage stability, and manufacturability. This parameter optimization ensures that the initiator is present in sufficient quantity to provide reliable adhesion and stability, while maintaining concentrations that are practical for manufacturing processes and cost-effective for production.

Inventive Principle:

Principle #35Parameter changes

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 achieves high adhesion and storage stability, with improved resin bonding and prolonged shelf life, suitable for dental restorations.

Implementation Method 1

a photopolymerization initiator, a thiourea derivative, a water miscible organic solvent, and water, wherein the photopolymerization initiator contains a diaryliodonium salt

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Implementation Method 2

primers are preliminarily applied to the tooth surfaces or prostheses to improve the adhesion of the resins

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 3

a water miscible organic solvent, and water

Methodology Applied

Scientific EffectSolvation: Solvation

Data Source

PatentUS12478561B2Dental composition and dental restorative kit

Publication Date: 2025.11.25 GC CORP

AI summary

One aspect of the invention is a dental composition of a single-component dental composition including a (meth)acrylate, a photopolymerization initiator, a thiourea derivative, a water miscible organic solvent, and water, wherein the photopolymerization initiator contains a diaryliodonium salt.