Dental Model Cone Anti-Twist Alignment Mechanism
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Solution Overview
Problem
The existing methods for producing dental prosthetics, such as single crowns, are cumbersome and costly due to the need for precise alignment and positioning of tooth stumps, which often results in tilting and rotation issues during the modeling process, leading to inefficiencies and inaccuracies.
Innovation Solution
A method utilizing an intraoral scanner to create digital data for a tooth stump and adjacent teeth, separating the data to create complementary 3D printed models of the tooth stump on a cone and the row of teeth, with anti-twist protection features like lateral indentations and markings for precise axial and rotational alignment, ensuring a precise fit and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cone is used to mount the tooth stump model for positioning in the dental arch model, then the alignment precision with adjacent teeth is improved, but the risk of tilting and rotation during insertion increases
Solution Approach 1:
The patent introduces asymmetric features on the cone including a lateral recess and circumferential markings that create a unique orientation. The lateral recess engages with a corresponding protrusion in the recess, while the markings align with a control window, providing both anti-rotation and anti-tilting functionality through asymmetric geometry
Solution Approach 2:
The patent uses the cone as an intermediary component between the tooth stump model and the dental arch model. The cone's specific geometric features (lateral recess, markings) act as mediators that enable precise positioning while preventing unwanted movements during the insertion process
2Ease of manufacture
If conventional plaster modeling methods are used to create dental models, then the process is simple in terms of materials, but the work steps are numerous and time-consuming
Solution Approach 1:
The patent performs preliminary digital scanning and virtual model creation before physical production. The intraoral scan and virtual assembly allow for pre-planning and optimization of the positioning system, reducing the number of physical trial-and-error steps needed during actual model fabrication
Solution Approach 2:
The patent replaces traditional mechanical plaster-based positioning methods with a digitally-driven system. The cone with its precision-engineered features provides mechanical positioning, while the overall process is controlled and optimized through digital modeling rather than manual plaster manipulation
3Manufacturing precision
If the tooth stump is positioned in the impression using skilled technique, then the isotactic position can be achieved, but the process requires particularly skilled technique and is difficult to reproduce
Solution Approach 1:
The cone's geometric features (lateral recess, markings) enable the model to self-position correctly during insertion. The asymmetric features automatically guide the cone into the correct orientation without requiring external guidance or skilled manipulation, making the process self-correcting and easier to perform
Data Source
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AI summary
The present invention relates to a method for producing a working model for dental purposes from a digitized impression, in which a digital data set is created using an intraoral scanner to represent a model of an existing row of teeth (10) comprising a tooth stump (11) to be provided with a crown, --the digital data relating to the tooth stump (11) are separated from the data relating to the row of teeth (10) with the remaining teeth, --a real model of the row of teeth with the remaining teeth without the tooth stump (11) is created using the digital data in 3D printing, --the tooth stump (11) is first virtually placed on a cone using the digital data, --a real model of the tooth stump (11) placed on the cone is created using the digital data in 3D printing, which is complementary to the real model of the row of teeth (10) with the remaining teeth in the area of the extracted tooth stump.--The real model of the tooth stump (11) is fitted into the real model of the dental arch (10) with the other teeth using the cone. Subsequently, a model of the tooth crown to be created can be modeled on the tooth stump (11), from which the tooth crown is then manufactured, whereby the model of the tooth crown is modeled using the complementary models of the dental arch (10) and the tooth stump (11) in such a way that the model of the tooth crown fits into the model of the dental arch (10) in a precisely defined position.