Dental Polymerizable Composition Storage Stability
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Solution Overview
Problem
The existing two-agent dental polymerizable compositions face challenges in maintaining curability after long-term storage, resulting in poor storage stability.
Innovation Solution
A dental polymerizable composition comprising a first agent with a (meth)acrylate having an acid group and an organic peroxide, and a second agent with a (meth)acrylate having no acid group, a thiourea derivative, and a glass powder containing aluminum, silicon, and at least one of copper or vanadium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-agent dental polymerizable composition includes a first agent with a (meth)acrylate having an acid group and an organic peroxide, and a second agent with a (meth)acrylate having no acid group, a thiourea derivative, and fluoroaluminosilicate glass powder, then the composition provides good initial curability, but the curability deteriorates after long-term storage
Solution Approach 1:
The patent changes the chemical composition parameters of the glass powder by replacing fluoroaluminosilicate glass powder with lithium disilicate glass powder containing specific metal elements (copper, vanadium, or manganese). This parameter change in glass composition prevents premature reaction during storage while maintaining curability after mixing, resolving the contradiction between initial curability and long-term storage stability.
Solution Approach 2:
The patent uses a composite glass powder formulation combining lithium disilicate base glass with specific metal oxide additives (copper oxide, vanadium oxide, or manganese oxide). This composite material structure provides both storage stability and curability by utilizing the synergistic effects of the base glass and metal elements in controlling the polymerization reaction timing.
2Reliability
If the glass powder contains copper or vanadium, then storage stability is improved, but the composition complexity increases
Solution Approach 1:
The glass powder serves multiple functions simultaneously: it acts as a filler providing mechanical strength, a source of metal elements (copper, vanadium, or manganese) that control reaction timing and improve storage stability, and an aesthetic component. This multi-functionality reduces the need for separate additives, simplifying the overall composition while achieving improved 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 achieves excellent storage stability, ensuring consistent curability even after long-term storage, while maintaining the necessary mechanical properties and aesthetic qualities.
Implementation Method 1
a first agent including a (meth)acrylate having an acid group and an organic peroxide
Data Source
AI summary
A dental polymerizable composition includes: a first agent including a (meth)acrylate having an acid group and an organic peroxide, and a second agent including a (meth)acrylate having no acid group, a thiourea derivative, and a glass powder, wherein the glass powder includes aluminum, silicon, and at least one of copper or vanadium.