Water-Soluble Supporting Paste for Dental Sintering
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Solution Overview
Problem
Existing dental supporting pastes adhere to molded parts, causing mechanical surface damage and strength reduction during high-temperature sintering or crystallization processes, and require complex removal methods like grinding or sandblasting, which can lead to geometric instability and surface disruptions.
Innovation Solution
A thermally stable supporting paste composed of water-insoluble inorganic substances that release water between 110° C and 1100° C, such as aluminum hydroxide, and geometrically stable fillers like glass or ceramic powders, which do not adhere to the molded parts and can be easily removed, ensuring geometrical stability and preventing mechanical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat protection pastes containing glass fibers, glass powders, ceramic powders, and thickening agents are used during high-temperature sintering, then the molded part is protected from thermal damage, but the paste adheres to the molded part surface and requires mechanical removal (grinding or sandblasting) which causes surface damage and strength reduction
Solution Approach 1:
The patent changes the chemical composition parameters of the supporting paste by using water-soluble polymers instead of traditional glass fibers and ceramic powders. This parameter change allows the paste to be removed by simple water rinsing rather than mechanical grinding or sandblasting, thereby preventing surface damage and maintaining mechanical strength while still providing thermal protection during sintering.
2Stability of the object's composition
If supporting pastes are used to prevent warpage during high-temperature treatment, then geometrical stability is improved, but the paste residues must be removed mechanically which causes surface damage
Solution Approach 1:
The patent employs a water-soluble polymer-based supporting paste that serves its protective function during sintering and is then easily removed by water rinsing. This disposable-like approach eliminates the need for mechanical removal methods (grinding or sandblasting) that cause surface damage, while still ensuring geometrical stability during the high-temperature treatment process.
3Reliability
If traditional heat protection pastes are used, then thermal protection is provided, but the paste adheres to the molded part and requires complex removal processes
Solution Approach 1:
The patent fundamentally changes the solubility parameter of the supporting paste by using water-soluble polymers as the binding agent. This parameter change transforms the removal process from complex mechanical operations (grinding or sandblasting) to a simple water rinsing process, making paste removal easy while maintaining thermal protection functionality.
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 paste provides reliable support during thermal treatment, prevents mechanical surface damage, and allows for easy residue removal without discoloration or strength loss, ensuring accurate fit and stability of dental restoration parts.
Implementation Method 1
a component (A), which loses water in a temperature range between 110° C. and 1100° C.
Data Source
AI summary
A supporting paste containing a component (A) which loses water in a temperature range between 110° C. and 1100° C., a component (B) which is geometrically stable at temperatures between 110° C. and 1100° C., solvent and auxiliary agents. Also, the preparation of such a supporting paste and to its use in particular in the field of dental technology.