Gingiva Deformation in 3D Digital Dental Models
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Solution Overview
Problem
Conventional methods for generating 3D digital models of jaws for orthodontic treatments fail to accurately depict gingiva deformation during tooth movement, leading to non-fit or over-fit issues with shell-shaped tooth repositioners and inability to show gingiva changes to patients.
Innovation Solution
A computer-implemented method that deforms a 3D digital model of gingiva based on deformation control points from both the gingiva and crown models in different states, using techniques like TPS deformation, to create a more accurate representation of gingiva changes, enabling the generation of a 3D digital model of the jaw that reflects actual gingiva conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gingiva parts of 3D digital models are kept consistent with the initial state, then the manufacturing process is simple, but the shell-shaped tooth repositioners do not fit well with the actual gingiva during treatment
Solution Approach 1:
The patent applies dynamics by transitioning from static gingiva models (consistent initial state) to dynamic gingiva models that deform and change shape according to tooth movement. The deformation process makes the gingiva model adaptive to different treatment stages, resolving the fit accuracy issue while maintaining manageable complexity through automated deformation algorithms.
Solution Approach 2:
The patent changes the parameters of the gingiva model by applying deformation based on control points and deformation amounts. This allows the gingiva model to transform from its initial state to match the actual gingiva condition at different treatment stages, improving fit accuracy without requiring complete remodelling.
2Loss of information
If the gingiva model remains unchanged in initial state, then the model generation is straightforward, but it cannot show the actual gingiva changes during orthodontic treatment
Solution Approach 1:
The patent applies preliminary action by pre-defining deformation control points and establishing deformation relationships before treatment. This allows the system to predict and visualize gingiva changes at different treatment stages without requiring complex real-time measurements, preserving deformation information while keeping the process manageable.
Solution Approach 2:
The patent creates a copied and transformed version of the initial gingiva model through deformation. This copied model retains the structural information of the original while adding deformation characteristics, allowing visualization of gingiva changes without losing the baseline reference.
3Reliability
If conventional 3D digital models are used with consistent gingiva, then the production efficiency is high, but the tooth repositioners cause pressure or non-fit issues on gingiva
Solution Approach 1:
The patent introduces dynamics to the gingiva model generation process, making it adaptive to tooth movement rather than static. This improves fit reliability by ensuring the repositioner matches actual gingiva conditions, while the automated deformation process maintains reasonable production efficiency.
Solution Approach 2:
The patent implements feedback by using tooth position information to drive gingiva deformation. The deformation control points and amounts are determined based on tooth movement, creating a feedback loop that ensures the gingiva model accurately reflects actual conditions, thereby improving fit reliability.
Data Source
AI summary
One aspect of the present application provides a computer-implemented method for generating a 3D digital model of gingiva, comprising: obtaining a 3D digital model of gingiva in a first state; and performing deformation process on the 3D digital model of the gingiva in the first state based on its deformation control points and deformation control points of a 3D digital model of crowns in a second state, to obtain a 3D digital model of the gingiva in the second state, wherein corresponding deformation control points of 3D digital models of the crowns and the gingiva in the same state coincide.