Self-Etch Dental Adhesive Merging Etching and Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current dental bonding systems, including multiple-component, two-component, and single-component primer systems, face challenges in achieving high bond strengths and stability over time, often requiring complex procedures and resulting in moderate to low bond strengths, especially when exposed to in vivo conditions.
Innovation Solution
A one-part or two-part self-etching primer adhesive system comprising specific components such as bisphenol A diglycidylether methacrylate phosphate, 2-hydroxyethyl-methacrylate, biphenyl dimethacrylate, dipentaerythritol pentaacrylate, bisphenol A diglycidylmethacrylate, ethyl-4-dimethyl-aminobenzoate, and camphorquinone, along with deionized water, aryl sulfinate salt, and ethanol, which allows for improved penetration and bonding to dentin and enamel without the need for additional mixing or activators, enhancing bond strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple-component primer systems are used to achieve high bond strengths, then bond strength is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent combines multiple primer components (phosphate ester monomer, hydrophilic monomer, acidic monomer, cross-linking monomer, tertiary amine, and initiator) into a single self-etching adhesive composition. This merging eliminates the need for separate application steps of multiple primers while maintaining high bond strength through the synergistic interaction of all components within one formulation.
Solution Approach 2:
The single-component self-etching adhesive performs multiple functions simultaneously: etching the dentin surface, priming the substrate, and bonding the restorative material. The composition contains all necessary functional groups (acidic groups for etching, hydrophilic groups for penetration, polymerizable groups for bonding) within one universal formulation that replaces traditional multi-step systems.
2Strength
If multiple-component primer systems are used to achieve high bond strengths, then bond strength is improved, but time consumption increases
Solution Approach 1:
The patent combines multiple primer components (phosphate ester monomer, hydrophilic monomer, acidic monomer, cross-linking monomer, tertiary amine, and initiator) into a single self-etching adhesive composition. This merging eliminates the need for separate application steps of multiple primers while maintaining high bond strength through the synergistic interaction of all components within one formulation.
Solution Approach 2:
The adhesive composition is pre-formulated with all necessary components in optimal concentrations and compatibility. The phosphate ester monomer and other functional groups are already integrated and stabilized in the final product, eliminating the need for dental professionals to mix components immediately before use and reducing application time.
3Ease of operation
If single-component primer systems are used to simplify the procedure, then ease of operation is improved, but bond strength decreases
Solution Approach 1:
The patent creates a composite adhesive formulation that integrates multiple functional monomers and additives into a single component system. The composite nature of the adhesive, containing phosphate ester monomer, hydrophilic monomer, acidic monomer, cross-linking monomer, tertiary amine, and initiator, provides both simplicity of application and high bond strength through the synergistic effects of its composite composition.
Solution Approach 2:
The patent optimizes the chemical parameters of the single-component system by carefully selecting and balancing the concentrations of different monomers and additives. The phosphate ester monomer content, molecular weight, and functional group ratios are specifically adjusted to achieve both ease of operation and high bond strength, demonstrating that parameter optimization can resolve the trade-off between simplicity and performance.
4Adaptability or versatility
If conventional adhesive systems are used, then compatibility with various composites is needed, but additional products and mixing steps are required
Solution Approach 1:
The self-etching adhesive is designed as a universal bonding system that is compatible with light-cured, self-cured, and dual-cured composite materials. The adhesive contains initiators and functional groups that can work with all three types of composites, eliminating the need for separate adhesive products for different composite types and simplifying the overall material system.
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 system achieves high microtensile shear bond strengths comparable to or exceeding those of existing systems, demonstrating improved durability and compatibility with light-cured, self-cured, and dual-cured materials, while simplifying the application process and reducing the need for additional products.
Implementation Method 1
treating the dental substrate with (1) an acidic acid solution of inorganic acids, polycarboxylic acids and metal salts of such acids capable of changing valence states
Implementation Method 2
displaying improved penetration into dentin and enamel, thereby forming a better hybrid layer
Implementation Method 3
applying a second polymerizable adhesive bonding monomer to the substrate comprising PMDM, BDTA-HEMA, 4-META, or other polymerizable acidic monomers
Data Source
AI summary
The present application relates to a dental primer adhesive system that is capable of being used as either a one-step or two-step self-etch dental primer and is compatible with self-cure composites and dual-cure composites with reduced permeability.