Dental Root Cap Keeper Tray With Removal Opening
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Solution Overview
Problem
Existing methods for attaching and detaching a keeper in dental magnetic attachments, such as those used in MRI-compatible root caps, often damage the root cap or require cumbersome procedures, leading to inefficiencies and economic burdens during MRI diagnostics.
Innovation Solution
A keeper tray with a specifically designed opening on its back surface allows for the secure formation of an insertion path for a thin rod-shaped tool, enabling easy removal and reattachment of the keeper without damaging the root cap, using a lost wax method that maintains magnetic attractive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the keeper is adhered in the space (cavity portion) by an adhesive, then the keeper can be fixed on the root cap, but the adhesive part must be grinded out and the edge of the space may be damaged during removal
Solution Approach 1:
The root cap is segmented into two functional zones: the space (cavity portion) for adhesive bonding and the rim (edge portion) for structural integrity. The opening in the rim provides a separate access path for removal tools, allowing the adhesive bond to remain intact while enabling tool insertion from the outer side to retrieve the keeper without damaging the space edge.
Solution Approach 2:
The opening in the rim acts as an intermediary access channel. Instead of directly accessing the adhesive from inside the space (which risks edge damage), the opening provides an alternative pathway for insertion tools to reach the keeper through the rim, mediating the removal process safely.
2Ease of operation
If the keeper is removed by breaking with an air turbine, then the keeper can be detached, but the root cap and keeper are damaged and economic burden increases
Solution Approach 1:
The root cap design provides its own built-in removal mechanism through the opening in the rim. This self-service feature eliminates the need for external breaking methods (air turbine), allowing the keeper to be retrieved intact through the opening using simple insertion tools, thus preserving both the root cap and keeper.
3Ease of operation
If the edge of the space is damaged during keeper removal, then the keeper can be removed, but the adhesive strength is not enough and the attached keeper may be dropped out
Solution Approach 1:
The root cap is segmented into two functional zones: the space (cavity portion) for adhesive bonding and the rim (edge portion) for structural integrity. The opening in the rim provides a separate access path for removal tools, allowing the adhesive bond to remain intact while enabling tool insertion from the outer side to retrieve the keeper without damaging the space edge.
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
Facilitates the easy and damage-free removal and reattachment of the keeper during MRI diagnostics, ensuring the root cap's integrity and maintaining the magnetic attachment's functionality.
Implementation Method 1
a method utilizing magnetic attractive force between a permanent magnet structure made of a permanent magnet covered surrounding and a keeper made of a soft magnetic material
Data Source
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AI summary
To provide a keeper tray corresponding to the removable keeper for easily casting a root cap by a lost wax method. The root cap is capable of attaching a conventional shaped keeper without losing magnetic attractive force, does not damage an edge of a space in which the keeper is inserted and adherently fixed when the keeper is removed at a time of MRI diagnosis, and is capable of detaching the keeper and attaching the keeper after the diagnosis. The keeper tray corresponding to the removable keeper is used at a time of casting a root cap for a dental magnetic attachment having a space S, in which the keeper is inserted and adherently fixed, by a lost wax method. The keeper tray corresponding to the removable keeper is made of a synthetic resin or a metal and has the formed space S thereon. The keeper tray corresponding to the removable keeper has a shape in which an opening 2 is formed on the bottom surface 1 by cutting out from an outer peripheral portion 1 a of the bottom surface 1 to a center portion and opens to a space S.