Nylon Denture Engagement Piece Elastic Deformation
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Solution Overview
Problem
Conventional denture systems require a labor-intensive and costly process of filling the denture base with resin, which increases the physical and economic burden on patients and dentists, and can lead to fit issues due to material shrinkage and external forces on fixtures.
Innovation Solution
A denture system featuring a nylon-based thermoplastic resin denture base and engagement piece members that deform elastically to fit over abutments, reducing the need for precise positioning and eliminating the need for a metal piece attachment, thereby simplifying the attachment and detachment process and reducing physical and economic burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a semi-finished denture is filled with resin to create the denture base, then the denture can be attached to the abutment, but the process increases physical and time burden on patient and dentist and increases cost
Solution Approach 1:
The denture base is pre-formed with an integrated engagement piece member that has a fitting hole matching the abutment shape before the denture is delivered to the patient. This preliminary preparation eliminates the need for on-site resin filling and complex attachment procedures, reducing the time and physical burden on both patient and dentist while maintaining manufacturing efficiency
Solution Approach 2:
The engagement piece member is merged with the denture base as a single integrated component made from the same nylon-based thermoplastic resin. This integration eliminates the need for separate attachment mechanisms and reduces the number of steps required for denture fabrication and fitting, directly addressing the time and complexity burdens
2Strength
If a hook is firmly fitted to the abutment with no gap, then secure attachment is achieved, but external forces are applied onto multiple abutments causing deterioration of fit and increased load on fixture
Solution Approach 1:
The engagement piece member is designed with a fitting hole that allows controlled elastic deformation when engaging with the abutment. This parameter change enables the engagement piece to adapt to minor variations in abutment positioning while distributing forces more evenly across the abutment structure, reducing harmful external forces on individual abutments compared to rigid hook attachments
Solution Approach 2:
The engagement piece member is positioned at specific locations on the denture base where it can engage with abutments, creating localized attachment points that distribute the load. This local quality approach ensures secure attachment while preventing excessive force concentration on any single abutment, thereby reducing deterioration of fit
3Ease of manufacture
If impression materials and plasters are used for molding, then the denture can be formed, but material shrinkage causes fit issues
Solution Approach 1:
The patent uses nylon-based thermoplastic resin for the denture base and engagement piece member, which has different shrinkage characteristics compared to traditional impression materials and plasters. This material parameter change helps compensate for shrinkage effects and maintains better fit accuracy throughout the denture structure
Solution Approach 2:
The engagement piece member with its precisely formed fitting hole is created during the initial molding process using the nylon-based resin. This preliminary formation ensures that the fit accuracy is built into the structure from the beginning, accounting for material shrinkage characteristics and eliminating subsequent adjustment needs
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 system provides a more efficient and cost-effective method for attaching and detaching dentures, improving fit and reducing the physical burden on patients and dentists by utilizing elastic deformation of engagement piece members made from nylon-based thermoplastic resin, which can be easily restored and maintains durability.
Implementation Method 1
the engagement piece member 13 is deformed to flare out, as if by pivoting about an end portion 13a thereof in a vertical direction Z, when attaching/detaching the denture 1
Implementation Method 2
the engagement piece member 13 is formed by a nylon-based thermoplastic resin
Data Source
AI summary
A denture system comprising: abutments coupled to the fixtures; and a denture to be detachably attached to the abutments, the denture including: a denture base; an artificial tooth supported by the denture base; a plurality of engagement piece members defining slits extending in the up-down direction; and a lid portion connecting end portions of the engagement piece members as well as closing one end of fitting hole in the up-down direction and covering an entire surface of the tip of the abutment, wherein the lid portion configures a part of the denture base, the piece member has a first surface and a second surface, and a grooved allowance portion is provided allowing the piece member to deform and spread in direction from the first surface toward the second surface.