Two-Package Dental Adhesive Segmentation
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Solution Overview
Problem
Current dental adhesive compositions face challenges in maintaining excellent adhesive properties for various dental materials over time and during long-term storage, leading to reduced effectiveness in clinical applications.
Innovation Solution
A two-package dental adhesive composition is developed, comprising a first agent with acidic group-containing and sulfur atom-containing polymerizable monomers, and a second agent with a silane coupling agent, borate compound, and water, which are separated to ensure stability and optimal mixing for improved adhesive properties when combined.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dental adhesive composition contains multiple reactive components (acidic group-containing polymerizable monomer, sulfur atom-containing polymerizable monomer, silane coupling agent, borate compound, and water) in a single package, then adhesive properties for various dental materials can be achieved, but the composition undergoes gelation during storage and loses stability
Solution Approach 1:
The dental adhesive composition is divided into two separate packages: Package A contains the acidic group-containing polymerizable monomer and sulfur atom-containing polymerizable monomer, while Package B contains the silane coupling agent, borate compound, and water. This segmentation prevents premature gelation during storage by keeping reactive components separate, while allowing both components to be present for achieving excellent adhesive properties when mixed before use.
2Strength
If all five components are mixed together immediately, then excellent adhesive strength is achieved, but the composition cannot be stored for long periods without gelation
Solution Approach 1:
The composition is segmented into two stable packages that can be stored separately for extended periods. Package A contains the polymerizable monomers (acidic group-containing and sulfur atom-containing), while Package B contains the silane coupling agent, borate compound, and water. This segmentation enables long-term storage without gelation while maintaining the capability to achieve excellent adhesive strength when the packages are mixed before application.
Solution Approach 2:
The two packages are prepared and stored separately in advance with all necessary components already in place. This preliminary preparation allows the composition to be stored for long periods without gelation, and when ready for use, the packages are simply mixed together to achieve the desired adhesive properties, eliminating the need for complex on-site preparation.
3Stability of the object's composition
If the adhesive composition is designed to be stable during storage, then gelation is prevented, but the adhesive properties for various dental materials are compromised
Solution Approach 1:
The composition is divided into two stable packages: Package A with acidic group-containing polymerizable monomer and sulfur atom-containing polymerizable monomer, and Package B with silane coupling agent, borate compound, and water. This segmentation maintains storage stability by preventing premature reactions, while the inclusion of all five components ensures that excellent adhesive properties for various dental materials are achieved when the packages are mixed before use.
Solution Approach 2:
The adhesive composition is designed with multi-functional components that provide universal adhesion to various dental materials including tooth substances, metals, metal oxides, and composite resin materials. The acidic group-containing monomer provides chelation capability, the sulfur atom-containing monomer enhances metal bonding, the silane coupling agent bonds to ceramics and composite resins, and the borate compound accelerates polymerization. All these functions are preserved in the two-package system, ensuring broad applicability while maintaining storage stability.
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 exhibits excellent adhesive properties for tooth substances, metals, metal oxides, and composite resin materials immediately after mixing and maintains stability over time, preventing gelation and ensuring reliable bonding.
Implementation Method 1
a first agent and a second agent, which are divided from each other, the two-package dental adhesive composition including at least five components including: (A) an acidic group-containing polymerizable monomer; (B) a sulfur atom-containing polymerizable monomer
Implementation Method 2
the second agent contains only (C) the silane coupling agent, (D) the borate compound, and (E) the water out of the five components
Implementation Method 3
wherein the second agent contains only (C) the silane coupling agent, (D) the borate compound, and (E) the water out of the five components
Data Source
AI summary
A two-package dental adhesive composition is provided that has an excellent adhesive property for each of various dental materials and also has excellent storage stability. The two-package dental adhesive composition includes a first agent and a second agent which are divided from each other. The two-package dental adhesive composition includes at least five components including: (A) an acidic group-containing polymerizable monomer; (B) a sulfur atom-containing polymerizable monomer; (C) a silane coupling agent; (D) a borate compound; and (E) water. The first agent contains only (A) the acidic group-containing polymerizable monomer and (B) the sulfur atom-containing polymerizable monomer out of the five components. The second agent contains only (C) the silane coupling agent, (D) the borate compound, and (E) the water out of the five components.