Alginate Dental Impression Material Viscosity Control
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Solution Overview
Problem
The agar-alginate combined impression method in dentistry requires complex temperature control for the agar impression material, leading to low operability and potential adhesion to tooth surfaces.
Innovation Solution
A dental impression material comprising a base material paste with alginate and water, and a curing material paste containing a gelling reagent and a poorly water-soluble liquid compound, with specific viscosity ranges to enhance operability and prevent adhesion, including a base material paste with a viscosity of 10% alginate solution between 5 mPa·s and 90 mPa·s at 20°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If agar impression material is used with high fluidity, then impression accuracy is improved, but temperature control operations become complicated and operability decreases
Solution Approach 1:
The patent changes the viscosity parameter of the agar impression material to a specific range (5-90 mPa·s at 20°C) to resolve the contradiction. This parameter optimization allows the material to maintain high fluidity for accurate impressions while eliminating the need for complex temperature control operations, thereby improving operability.
2Measurement precision
If agar impression material with high fluidity is used, then impression accuracy is improved, but adhesion to tooth surfaces increases
Solution Approach 1:
The patent optimizes the viscosity parameter to the specific range of 5-90 mPa·s at 20°C, which prevents excessive adhesion to tooth surfaces while maintaining sufficient fluidity for accurate impressions. This parameter control ensures the material flows adequately to capture impression details without bonding to the teeth.
3Ease of operation
If alginate viscosity is increased to prevent adhesion, then operability is improved, but fluidity decreases and impression accuracy suffers
Solution Approach 1:
The patent establishes a specific viscosity range (5-90 mPa·s at 20°C) that balances operability and impression accuracy. This optimized parameter range prevents adhesion while maintaining sufficient fluidity for the material to flow into all oral cavity structures and capture accurate impressions.
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 solution provides improved operability and prevents adhesion to tooth surfaces while maintaining impression accuracy when combined with another alginate impression material.
Implementation Method 1
a base material paste that includes an alginate and water; and a curing material paste that includes a gelling reagent
Implementation Method 2
a curing material paste that includes a gelling reagent and a poorly water-soluble liquid compound
Data Source
AI summary
A dental impression material includes: a base material paste that includes an alginate and water; and a curing material paste that includes a gelling reagent and a poorly water-soluble liquid compound. A viscosity of 10% aqueous solution of the alginate at 20°C is 5 mPa·s or more and 90 mPa·s or less.