Dental Polymerizable Composition with Condensed Silanes for Flexural Strength
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Solution Overview
Problem
Current polysiloxane-based dental materials face challenges with mechanical properties such as flexural strength and Young's modulus, falling short of conventional dental composites, and exhibit undesirable properties like increased viscosity and water absorption due to free polar functional groups.
Innovation Solution
A novel dental polymerizable composition comprising a mixture of silanes (a1), (a2), and (a3) or their cocondensates, with specific weight percentages, to enhance mechanical properties and reduce water absorption, maintaining a comfortable consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polysiloxane-based dental materials are used, then biocompatibility and low polymerization shrinkage are achieved, but mechanical properties (flexural strength and Young's modulus) fall short of conventional dental composites
Solution Approach 1:
The patent combines polysiloxane components with specific silane additives (a1, a2, a3) to create a composite material system. The polysiloxane matrix provides biocompatibility and low shrinkage, while the silane components contribute to enhanced mechanical strength through their molecular structure and crosslinking capabilities, achieving both requirements simultaneously.
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of silanes (a1), (a2), and (a3) with defined functional groups. This parameter change transforms the material properties, increasing flexural strength and Young's modulus while preserving the biocompatibility inherent to polysiloxane systems.
2Stability of the object's composition
If polysiloxane-based dental materials are used, then low polymerization shrinkage is achieved, but mechanical properties (Young's modulus) fall short of conventional dental composites
Solution Approach 1:
The patent creates a composite system where polysiloxane provides dimensional stability during polymerization while silane components enhance stiffness. The synergistic interaction between components allows the material to maintain low shrinkage while achieving superior Young's modulus values.
Solution Approach 2:
By adjusting the composition parameters—specifically the types and ratios of silanes (a1), (a2), and (a3)—the patent optimizes both the polymerization shrinkage and Young's modulus, transforming the material to meet both requirements.
3Stability of the object's composition
If polysiloxane-based dental materials are used, then low polymerization shrinkage is achieved, but water absorption increases due to free polar functional groups
Solution Approach 1:
The patent removes or reduces the harmful effect of free polar functional groups that cause water absorption. By incorporating specific silane components that react with or mask these polar groups, the material maintains low polymerization shrinkage while significantly reducing water absorption through this extraction of the problematic functional groups.
Solution Approach 2:
The patent converts the potentially harmful polar functional groups into beneficial crosslinked structures through reaction with silane components. This transformation eliminates water absorption issues while preserving the low shrinkage advantage, turning a disadvantage into an advantage.
4Stability of the object's composition
If polysiloxane-based dental materials are used, then low polymerization shrinkage is achieved, but viscosity increases making handling difficult
Solution Approach 1:
The patent adjusts compositional parameters by selecting specific silane components and ratios that modify the viscosity characteristics. This parameter optimization allows the material to maintain low polymerization shrinkage while achieving a viscosity range suitable for clinical handling and application.
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 improved flexural strength and Young's modulus, reducing polymerization shrinkage and water absorption, ensuring better clinical performance and processability.
Implementation Method 1
comprise a mixture of the condensates of the three silanes (a1), (a2) and (a3) and/or a cocondensate of a mixture of the three silanes (a1), (a2) and (a3)
Implementation Method 2
initiators and/or catalysts and/or activators for the polymerization
Data Source
AI summary
The present invention relates to novel dental polymerizable compositions comprising (A) polysiloxanes, wherein the polysiloxanes comprise a mixture of the condensates of the three silanes (a1), (a2) and (a3) and/or a co-condensate of a mixture of the three silanes (a1), (a2) and (a3) and/or a mixture of at least two of the co-condensates (a1)/(a2), (a1)/(a3) and (a2)/(a3) and/or a mixture of the condensate of one of the three silanes (a1), (a2) or (a3) with the co-condensate of the other two silanes, (B) fillers and (C) initiators and/or catalysts and/or activators for polymerization.