Polyether Dental Impression Material Manual Mixing
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Solution Overview
Problem
Existing dental impression materials require complex or high-force mixing processes, making them difficult to handle manually, which complicates the production of high-precision dental impressions.
Innovation Solution
A dental impression material comprising polymerizable polyethers with aziridino, olefinically unsaturated, or alkoxysilyl groups, combined with a random copolyether fluidity improver, allowing for manual mixing using common dispensers while maintaining high precision and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional polyether impression materials are used, then high-precision impressions are obtained, but complex or high-force mixing processes are required
Solution Approach 1:
The patent modifies the molecular structure of polyether by introducing cyclic ether units (1,3-dioxolane and/or 1,3-dioxane) with specific content ranges (0.1-10 mol% and 0.1-5 mol% respectively) to alter the material's viscosity and flow characteristics. This chemical parameter change enables the material to achieve both high precision and ease of manual mixing without requiring complex equipment
Solution Approach 2:
The invention creates a composite polyether structure combining linear polyether chains with cyclic ether units. This composite approach integrates the hydrophilic nature and flow properties of linear polyethers with the viscosity-modifying effects of cyclic structures, resulting in a material that maintains impression precision while improving mixability
2Ease of operation
If manual mixing is used, then operation simplicity is improved, but material handling behavior is insufficient
Solution Approach 1:
By controlling the molecular weight (Mw: 1,000-10,000) and the specific content of cyclic ether units, the patent optimizes the viscosity and thixotropic properties of the polyether. These parameter adjustments ensure the material remains stable during storage yet becomes sufficiently fluid during manual mixing, achieving both reliability and operational simplicity
3Ease of operation
If cyclic polyether content is reduced, then removability and demouldability are improved, but fluidity and precision are affected
Solution Approach 1:
The patent identifies and controls multiple parameters simultaneously: cyclic ether content (1,3-dioxolane: 0.1-10 mol%, 1,3-dioxane: 0.1-5 mol%), molecular weight (1,000-10,000), and hydroxyl value (30-200 mg KOH/g). This multi-parameter optimization allows the material to achieve low cyclic content for easy removal while maintaining sufficient fluidity and precision through the balanced composition
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
Enables easy manual mixing of dental impression materials with improved fluidity and mechanical properties, ensuring high-precision impressions and long-term stability without the need for complex equipment.
Implementation Method 1
about 0.1 to about 15% by weight of a random copolyether of ethyleneoxide and at least one more alkyleneoxide which is not ethylene oxide, the copolymer comprising at least about 50% of structural elements from ethylene oxide as a fluidity improver
Implementation Method 2
polymerizable polyether material which is selected from the group consisting of a) polyethers with at least one aziridino group, b) polyethers with at least one olefinically unsaturated group and a compound with at least one SiH group
Data Source
AI summary
The invention relates to preparations based on polymerizable polyether materials and a fluidity improver and to the use thereof in producing dental materials, especially impression materials.