Dental Capsule Protrusion Controls Mixing Sound
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Solution Overview
Problem
The existing capsules for tooth restorative materials generate a bursting sound when the partition wall between the powder and liquid components is pushed and broken, leading to inefficient mixing and administration of the restorative material.
Innovation Solution
A capsule design featuring a powder component storing cup, a liquid component storing cup, a plunger, and a nozzle, where a protrusion portion on the nozzle obstructs the breaking of the opening forming portion to prevent the bursting sound, allowing for secure and silent mixing and administration of the restorative material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the partition wall is pushed and broken to mix the powder and liquid components, then the mixing and administration of restorative material is achieved, but a bursting sound is generated
Solution Approach 1:
A protrusion portion is introduced as an intermediary element between the partition wall breaking mechanism and the mixing chamber. This protrusion portion serves as a mediator that controls the breaking process, preventing the partition wall from breaking all at once while still allowing the liquid component to flow into the powder component for mixing.
Solution Approach 2:
The protrusion portion is pre-positioned in the mixing chamber before the partition wall is broken. This preliminary positioning ensures that when the partition wall breaks, the liquid component flows in a controlled manner along the protrusion portion rather than causing a sudden burst, thus preventing the harmful sound while maintaining mixing efficiency.
2Reliability
If the liquid component is stored in a bag made of laminated resin film and aluminum foil, then the isolated state is maintained, but the aluminum foil dissolves when the bag is broken by acid liquid
Solution Approach 1:
The aluminum foil layer is extracted and removed from the bag structure. The patent replaces the laminated resin film and aluminum foil bag with a capsule structure made entirely of resin material, eliminating the aluminum foil component that would react with and dissolve in acid liquid, thus preventing contamination of the restorative material.
Solution Approach 2:
The patent uses composite resin materials to construct the capsule that replaces the previous laminated structure. The resin capsule provides both the necessary isolation properties and chemical resistance to acid liquid components, avoiding the dissolution problem associated with aluminum foil while maintaining structural integrity.
3Speed
If the partition wall breaks in a breath to allow liquid component flow, then mixing is achieved quickly, but the bursting sound is generated
Solution Approach 1:
The protrusion portion acts as a flow guide and mediator that channels the liquid component in a controlled path as the partition wall breaks. This intermediary structure allows the liquid to flow quickly into the mixing chamber without causing a sudden burst, thus maintaining high mixing speed while eliminating the bursting sound.
Data Source
AI summary
To prevent a bursting sound generated when a mixed and kneaded material obtained by mixing and kneading predetermined amounts of a powder component and a liquid component in a capsule for a tooth restorative material is administrated to a position to be restored in a patient's tooth, the capsule is structured such that a protrusion portion (4c) having its inner end positioned slightly inside an outer periphery of a circular hole of a first opening forming portion (1b) is provided on a rear end portion of a nozzle (4) in such a manner as to be positioned at a position which is in the vicinity of the first opening forming portion (1b) to form the circular hole for an outlet of a mixed and kneaded material (C) of a powder component storing cup (1) and is away from at least a hinge portion of the circular hole.