Dental Working Model With Rigid Insert for Precise Stump Coupling
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Solution Overview
Problem
Existing 3D printing technologies for dental prostheses face challenges in achieving precise coupling between the model mandible with teeth and the model tooth stump due to resin shrinkage, leading to misalignments and imprecise geometry reproduction.
Innovation Solution
Incorporating a rigid insert, preferably made of metal, into the model tooth stump that does not experience shrinkage, and using fixing means such as threaded holes and screws for detachable integration with the model mandible, ensuring precise alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the model tooth stump and model mandible are made from resin by means of 3D printing, then the manufacturing process is simplified and automation is increased, but manufacturing precision deteriorates due to resin shrinkage causing geometric variations and misalignments
Solution Approach 1:
The model tooth stump combines resin material (for the main body) with metal insert material (for the coupling portion). The metal insert is embedded in the resin body and provides precise coupling features (threaded holes,定位 holes) that do not suffer from resin shrinkage, thereby maintaining high manufacturing precision while preserving the automation benefits of 3D printing for the main body.
Solution Approach 2:
The patent applies different material properties to different parts of the model tooth stump: the main body is made from resin suitable for 3D printing, while the coupling portion (first end) incorporates rigid metal inserts for precise mechanical coupling. This local differentiation allows each part to have the optimal properties for its specific function.
2Manufacturing precision
If a rigid insert is incorporated into the model tooth stump to improve coupling precision, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The model tooth stump is divided into two functional segments: the resin main body (manufactured by 3D printing) and the metal insert (embedded in the first end). This segmentation allows each component to be optimized independently - the resin body for ease of manufacturing and the metal insert for precision coupling - while simplifying the overall assembly process.
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 solution significantly reduces geometric variations and ensures precise positioning of the model tooth stump on the model mandible, maintaining accurate coupling without complicating the laboratory process.
Implementation Method 1
a rigid insert (6), preferably made of metal, into the model tooth stump (4) which does not experience shrinkage
Data Source
AI summary
The invention relates to a working model to perform a dental prosthesis for a tooth stump, comprising a model mandible with teeth made from resin by means of 3D printing and a detachable model tooth stump. The model tooth stump comprises a main body made from resin by means of 3D printing and a rigid insert introduced in a housing formed in said main body. First fixing means comprised in the rigid insert cooperate with second fixing means, passing through the through holes made in the model mandible with teeth, for integrally attaching the model tooth stump to the model mandible with teeth in a detachable manner.