3D Tooth Row Synthesis Using IOS-CT Crown Replacement
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Solution Overview
Problem
Existing methods fail to accurately synthesize intra oral scanner (IOS) data and CT data to generate three-dimensional data of a tooth row, with IOS data lacking complete tooth shape and CT data lacking soft tissue details.
Innovation Solution
A data processing apparatus and method that converts and synthesizes IOS data and CT data, replacing matching crowns and arranging gingiva near the IOS crown, using processing circuitry to align and interpolate gaps for accurate three-dimensional data generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If IOS data and CT data are synthesized without replacement and alignment, then the synthesis process is simple, but the accuracy of three-dimensional tooth row data is poor
Solution Approach 1:
The patent segments the tooth row data into crown portions and gingiva portions, processing each segment separately before synthesis. The crown portion from IOS data is replaced with the corresponding crown portion from CT data, while the gingiva portion is retained from IOS data, allowing accurate integration of both data types without overwhelming complexity
Solution Approach 2:
The patent introduces coordinate transformation and data format conversion as intermediary steps to bridge the IOS data and CT data. By converting both data types into a common coordinate system and format before synthesis, the system achieves accurate integration while managing complexity through standardized transformation processes
2Loss of information
If IOS data is used alone, then soft tissue details are captured, but complete tooth shape information is missing
Solution Approach 1:
The patent merges IOS data (which contains soft tissue details) with CT data (which contains complete tooth shape information) by replacing the crown portion in IOS data with the corresponding crown portion from CT data, while retaining the gingiva portion from IOS data, thus achieving both completeness and precision
Solution Approach 2:
The patent extracts the crown portion and gingiva portion as separate elements from the tooth row data, allowing the crown to be replaced with more accurate CT data while keeping the gingiva from IOS data, thereby addressing the information loss without sacrificing soft tissue detail accuracy
3Loss of information
If CT data is used alone, then complete tooth shape is obtained, but soft tissue details are missing
Solution Approach 1:
The patent combines CT data (providing complete tooth shape) with IOS data (providing soft tissue details) by retaining the gingiva portion from IOS data while using the crown portion from CT data, achieving both completeness of soft tissue information and accuracy of tooth shape
4Measurement precision
If data synthesis is performed without coordinate conversion, then the process is faster, but data alignment accuracy is poor
Solution Approach 1:
The patent performs coordinate transformation and data format conversion as preliminary actions before the actual synthesis operation. By pre-aligning the coordinate systems and converting data formats in advance, the subsequent synthesis process benefits from accurate alignment without requiring complex real-time calculations, thus balancing speed and precision
Data Source
AI summary
A data processing apparatus includes: an input portion configured to receive IOS data and CT data as an input, the IOS data being obtained by performing scanning by an intra oral scanner and including coordinate data of a point group indicating a surface shape of a tooth row including an IOS crown and an IOS gingiva, the CT data being obtained by performing capturing by a CT imaging device and including volume data of a CT crown; and processing circuitry. The processing circuitry 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 matches, with the IOS crown included in the IOS data, and performs synthesis in such a way that the IOS gingiva is arranged near the IOS crown after replacement.