3D Tooth Row Reconstruction by Aligning IOS and CT Data
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Solution Overview
Problem
Existing methods fail to effectively integrate intraoral scan and dental cone-beam computerized tomography images into a single image, lacking clear guidance on how to accurately generate three-dimensional data of a tooth row using IOS and CT data.
Innovation Solution
The data processing apparatus and method that integrates IOS and CT data by aligning IOS data with CT data, correcting IOS data errors, and interpolating gaps in IOS data to generate accurate three-dimensional tooth row data by using an arithmetic unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If IOS data and CT data are synthesized without clear guidance on alignment and error correction, then the synthesis process is simple, but the accuracy of three-dimensional tooth row data generation deteriorates
Solution Approach 1:
The patent segments the data synthesis process into distinct stages: (1) aligning IOS crown data with CT crown data, (2) correcting IOS data errors through comparison with CT data, and (3) interpolating gaps in the IOS data. This segmentation allows each stage to be optimized independently while achieving high overall accuracy.
Solution Approach 2:
The patent uses CT data as an intermediary reference to correct and validate IOS data. The CT scan serves as a mediator that provides ground truth information about tooth structure, allowing the system to identify and correct errors in the IOS data without requiring direct self-validation.
2Reliability
If IOS data errors are not corrected and gaps are not interpolated, then the data processing is fast, but the reliability of the generated three-dimensional data deteriorates
Solution Approach 1:
The patent performs preliminary alignment of IOS and CT crown data before proceeding to error correction and gap interpolation. This preliminary action establishes a reference framework that enables subsequent corrections to be applied systematically, improving reliability without requiring exhaustive processing.
Solution Approach 2:
The system uses CT data as feedback to validate and correct IOS data. By continuously comparing IOS measurements against the CT reference standard, the system can identify and correct errors, ensuring high reliability while maintaining efficient processing through targeted corrections rather than complete reprocessing.
3Ease of operation
If individual tooth segmentation and identification is not performed, then the data processing is simple, but the ability to correct stitching errors deteriorates
Solution Approach 1:
The patent segments the tooth row data into individual tooth units, enabling independent alignment and correction of each tooth's crown data. This segmentation allows stitching errors between adjacent teeth to be identified and corrected locally without affecting the entire dataset, improving precision while maintaining operational simplicity through automated per-tooth processing.
Data Source
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AI summary
A data processing apparatus (10) includes: an input portion (13, 14) configured to receive IOS data and CT data as an input, the IOS data being obtained by performing scanning by an intra oral scanner (20) and including coordinate data of a point group indicating a surface shape of a tooth row including an IOS crown (21) and an IOS gingiva (22), the CT data being obtained by performing capturing by a CT imaging device (30) and including volume data of a CT crown; and processing circuitry (11). The processing circuitry (11) replaces, in the CT data, a crown part of a CT tooth included in the CT data with which a shape of the IOS crown (21) matches, with the IOS crown (21) included in the IOS data, and performs synthesis in such a way that the IOS gingiva (22) is arranged near the IOS crown (21) after replacement.