Self-Curing Endodontic Sealer Composition for Root Canal Filling
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Solution Overview
Problem
Traditional gutta-percha and sealer compositions used in root canal procedures have high viscosity and tackiness when heated, limiting their ability to penetrate all tubules and openings, resulting in incomplete sealing of the root canal system, and require separate application steps.
Innovation Solution
A two-in-one sealer and root canal filling material composition that is self-curable at room temperature, using a liquid gutta-percha polymerizable system with components such as methacrylated polyisoprene, epoxy modified polyisoprene, and amine modified polyisoprene, which reacts to form a durable seal without the need for heat, allowing for improved adhesion to dentin and other filling materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If gutta-percha is heated above its melt temperature to improve flow, then it becomes more fluid and can fill the canal, but it develops very high viscosity and becomes tacky, preventing complete penetration into all tubules
Solution Approach 1:
The patent changes the chemical composition parameters of the sealer material, specifically using a silane-based polymer with controlled molecular weight and cross-linking density. This allows the material to maintain low viscosity at room temperature without requiring thermal heating, thereby avoiding the tackiness and high viscosity problems that occur with heated gutta-percha while still achieving complete tubule penetration
Solution Approach 2:
The patent creates a composite sealer system combining silane polymer base, radiopacifier particles, and coupling agents. This composite formulation achieves the desired balance of low viscosity for penetration, adequate radiopacity for detection, and proper adhesion properties without the drawbacks of traditional heated gutta-percha systems
2Speed
If the polymer portion of the sealer composite is made with very low viscosity to flow into small gaps, then sealing penetration improves, but the material lacks structural integrity and adhesion strength
Solution Approach 1:
The patent carefully controls the molecular weight and functional group content of the silane polymer to achieve optimal viscosity-strength balance. The polymer is designed with specific silane coupling agent concentrations that enable low initial viscosity for penetration while providing cross-linking capability for subsequent strength development
Solution Approach 2:
The patent replaces mechanical interlocking (reliance on viscosity alone) with chemical bonding mechanisms. The silane functional groups form covalent bonds with both the dentin substrate and the filler particles, creating a chemically bonded network that provides strength independent of the initial viscosity state
3Reliability
If traditional gutta-percha and sealer are used as separate materials, then each can be optimized for its specific function, but the procedure requires multiple application steps and increases treatment complexity
Solution Approach 1:
The patent merges the sealer and filling material into a single integrated composition. The silane-based material simultaneously provides sealing properties (penetration into tubules), filling properties (canal occupation), and adhesion properties (bonding to dentin and gutta-percha), eliminating the need for separate sealer and filling material application steps
Solution Approach 2:
The patent creates a universal endodontic material that performs multiple functions: it seals the canal system by penetrating tubules, fills the canal space, adheres to dentin and gutta-percha surfaces, and provides radiopacity. This multi-functional material simplifies the clinical procedure while maintaining or improving each individual function compared to traditional separate materials
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 effectively fills and seals the root canal system at room temperature, providing improved penetration and adhesion, reducing the need for separate heating steps and enhancing the overall sealing efficacy.
Implementation Method 1
uses liquid GP that polymerizes
Implementation Method 2
self-curable at room temperature
Data Source
AI summary
The present invention is directed to a dental composition, and specifically to an improved composition for endodontic instruments useful for filling root canals or sealing.