3D Tooth Model Gum Line Extraction for Precise Dental Devices
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Solution Overview
Problem
Current methods for acquiring gum lines in tooth models are inaccurate and inefficient, making them unsuitable for precise and timely data processing in invisible orthodontic treatments.
Innovation Solution
A method for determining gum lines by categorizing edges of polygonal patches in three-dimensional tooth models, followed by converting the gum lines into cutting lines for precise dental device manufacturing, and utilizing seed point expansion and segmentation techniques for accurate tooth segmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual drawing or automatic identification methods are used to acquire gum lines, then the process is simple to implement, but the accuracy and efficiency of gum line extraction are low
Solution Approach 1:
The method segments the gum line extraction process into distinct phases: identifying candidate edges from the 3D tooth model, classifying edges as gum or non-gum edges based on geometric features, and reconstructing the gum line from classified edges. This segmentation enables automated processing while maintaining high accuracy.
Solution Approach 2:
The patent replaces manual drawing operations with an automated computer-based system that uses geometric feature analysis and classification algorithms to identify and extract gum lines from 3D tooth models, significantly improving both accuracy and efficiency.
2Manufacturing precision
If data pre-processing operations are performed on tooth models including placement, hollowing out and Boolean operations, then the dental device can be manufactured, but the processing time occupies most of the 3D tooth printing work time
Solution Approach 1:
The gum line extraction and tooth segmentation operations are performed as preliminary actions on the 3D tooth model before the main manufacturing process. By preparing the model with accurate gum lines and segmented teeth in advance, subsequent manufacturing steps can proceed more efficiently without reprocessing.
Solution Approach 2:
The method extracts critical geometric features (gum lines and tooth boundaries) from the complete 3D tooth model to create a simplified representation that retains essential information for manufacturing while reducing the complexity of subsequent processing operations.
3Ease of operation
If automatic identification methods are used for gum line acquisition, then operational simplicity is improved, but extraction accuracy remains insufficient for precise dental device manufacturing
Solution Approach 1:
The system automatically adjusts classification parameters and geometric thresholds based on the specific characteristics of each tooth model, enabling the automated identification process to achieve high accuracy without requiring manual intervention while adapting to different dental anatomies.
Data Source
AI summary
A gum line extraction method, a manufacturing method of a dental device, and an electronic device are provided. The gum line extraction method includes: obtaining a three-dimensional tooth model, the three-dimensional teeth model including a plurality of polygonal patches; determining an edge category of an edge of the plurality of polygonal patches, the edge category including a tooth edge and a gum edge; and determining a gum line of the three-dimensional tooth model according to the edge category of the edge of the plurality of polygonal patches.