Light-Curable Dental Impression Material with Polysiloxane Resin
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Solution Overview
Problem
Conventional dental impression materials have limited working and setting times, require immediate mixing chairside, are sensitive to moisture, and lack tear resistance, making them inconvenient and less effective for detailed impressions.
Innovation Solution
A light-curable dental impression material composed of radically polymerizable polysiloxane compounds with a polymerizable carbon-carbon double bond and a polysiloxane group, allowing for a one-component, ready-to-use formulation that is highly stable, resistant to moisture, and provides excellent tear resistance and dimensional stability without shrinkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dental impression materials are used, then good detail reproduction is achieved, but the materials require immediate mixing and have limited working time
Solution Approach 1:
The invention divides the curing process into two independent stages: storage stability is maintained through separate components, and curing is initiated only when needed. The light-curable composition remains stable during storage and can be dispensed without immediate mixing, allowing extended working time while maintaining the ability to achieve good detail reproduction when cured.
Solution Approach 2:
The material is prepared in advance as a stable, single-component light-curable composition that does not require immediate mixing before use. The photoinitiator system is pre-incorporated, allowing the material to be dispensed and then cured on demand with light exposure, thereby extending working time while preserving detail reproduction capability.
2Manufacturing precision
If conventional addition silicone impression materials are used, then good detail reproduction is achieved, but the materials have poor tear resistance
Solution Approach 1:
The invention uses a composite light-curable composition containing polysiloxane resin, photoinitiator, and filler in a single phase. This composite structure combines the detail reproduction properties of silicone-based materials with the tear resistance of cross-linked polymer networks, achieving both good detail reproduction and excellent tear resistance simultaneously.
3Reliability
If conventional dental impression materials are used, then the materials can be cured, but they require separation of reactive components and immediate mixing
Solution Approach 1:
The invention merges all necessary components (polysiloxane resin, photoinitiator, filler, and other additives) into a single stable composition that does not require separation or mixing before use. The light-curable composition can be dispensed directly from a cartridge and cured with light exposure, eliminating the complexity of multi-component mixing systems while maintaining reliable curing.
4Reliability
If conventional dental impression materials are used, then the materials can set, but they have limited storage stability without separation of components
Solution Approach 1:
The invention replaces the chemical mixing system with a light-activated curing system. The composition remains stable during storage because no chemical reaction occurs without light exposure. When needed, light exposure initiates the curing reaction, providing both long-term storage stability and reliable setting when required.
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 material offers improved storage stability, adjustable working and setting times, and superior mechanical properties, ensuring precise and durable dental impressions without the need for immediate mixing, while maintaining excellent detail reproduction and reduced adhesion to dental structures.
Implementation Method 1
a light-curable dental impression material which comprises a polymerizable polysiloxane resin composition comprising compounds of formula (I)
Data Source
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AI summary
A light-curable dental impression material comprising (a) a polymerizable polysiloxane resin composition comprising compounds of formula (I) : E-(L1-Z)n- L2-E; (b) a particulate filler; and (c) a photoinitiator.