Denture Mold Vent Holes and Permeable Holder for Bubble Discharge
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Solution Overview
Problem
Conventional methods for manufacturing plate dentures often result in cracked or bubbly denture bases due to material shrinkage during polymerization, leading to low strength and variability in quality depending on the technician's skills.
Innovation Solution
A method involving a denture mold with vent holes and a holder of higher gas permeability to discharge bubbles during curing, ensuring intimate contact between the mold and the denture base material, thereby reducing shrinkage and preventing cracks or bubbles in the cured product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polymerization proceeds with bubbles present in the denture base material, then the denture base material may shrink to a relatively great degree, but the resulting cured product may crack and be low in strength
Solution Approach 1:
The invention converts the harmful effect of bubbles during polymerization into a beneficial outcome by providing vent holes that allow bubbles to escape. The vent holes transform the harmful bubble accumulation into a controlled release mechanism, preventing cracks while managing the shrinkage that occurs during curing.
Solution Approach 2:
The denture mold incorporates vent holes (porous structure) that allow gas bubbles to escape during polymerization. This porous feature in the mold design enables controlled gas release, preventing bubble accumulation that would otherwise cause cracking in the cured denture base.
2Manufacturing precision
If manual bonding of artificial teeth to denture bases is performed one at a time, then positioning can be done with sophisticated skills, but the process requires considerable time and effort
Solution Approach 1:
The invention performs preliminary action by pre-arranging artificial teeth in the desired positions within the denture base material before complete curing. The vent holes allow bubble escape during this preliminary setting phase, enabling efficient positioning without requiring time-consuming manual adjustment after bonding.
Solution Approach 2:
The invention merges the positioning and bonding operations into a single integrated process. Artificial teeth are positioned and bonded simultaneously during the polymerization process, eliminating the need for separate positioning and bonding steps that characterize traditional manual methods.
3Object-generated harmful factors
If the holder is higher in gas permeability than the denture mold, then bubbles can be discharged during curing, but the denture base material must not flow out through the vent holes
Solution Approach 1:
The invention applies local quality by making the holder more gas permeable than the denture mold specifically at the vent hole locations. This localized difference in permeability allows bubbles to escape through the holder while the denture mold structure elsewhere maintains its integrity to prevent material leakage.
Solution Approach 2:
The holder acts as an intermediary component between the denture mold and the external environment. It mediates the bubble escape process by providing a controlled path for gas release while preventing denture base material from flowing out, thus protecting the molding process from harmful effects.
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 method effectively reduces or eliminates cracks and bubbles in the denture base, enhancing the strength and consistency of the manufactured plate dentures, independent of the technician's skill level.
Implementation Method 1
the holder being higher in gas permeability than the denture mold
Implementation Method 2
a plurality of vent holes defined in the bottom wall, passing through the bottom wall in an up-down direction, and in communication with the forming space
Data Source
AI summary
A plate denture manufacturing method includes preparing three-dimensional data for an artificial tooth impression and a plate denture, preparing a denture mold including a bottom wall, a side wall, a forming space which is surrounded by the bottom wall and the side wall and into which a denture base material is to be poured, a cutting target region to be cut by a cutting apparatus, and vent holes passing through the bottom wall, cutting a groove in the cutting target region using the cutting apparatus, placing the denture mold on a holder, placing an artificial tooth in the groove, pouring the denture base material into the forming space and curing the denture base material so as to fabricate a one-piece product including the denture mold, the artificial tooth, and a cured product of the denture base material that are integral with each other, and machining the cured product.