3D Tooth Modeling Using 2D X-Ray Alignment for Root Accuracy
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Solution Overview
Problem
Existing dental modeling techniques face challenges in creating accurate three-dimensional tooth models that include both crown and root information, as optical scanning methods are incomplete below the gum line, while three-dimensional x-ray techniques expose patients to excessive radiation and are costly and cumbersome.
Innovation Solution
A method combining three-dimensional optical scanning and two-dimensional x-ray imaging to create a three-dimensional tooth model, using a scan model to project and align 3D tooth models onto 2D x-ray images, adjusting crown and root components for accurate alignment and calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional x-ray techniques are used to obtain complete tooth information including roots, then measurement precision is improved, but radiation exposure to patients increases and device complexity and cost increase
Solution Approach 1:
The patent divides the tooth modeling process into two segments: (1) optical scanning to capture the crown portion above the gum line, and (2) conventional 2D x-ray imaging to capture the root portion below the gum line. These segmented approaches are then combined computationally to create a complete 3D tooth model, avoiding the need for full 3D x-ray scanning while maintaining comprehensive tooth information.
Solution Approach 2:
The patent merges data from two different imaging modalities (optical scanning and 2D x-ray) to achieve a complete tooth model. The system combines the crown information from optical scanning with root information from 2D x-ray images, integrating multiple data sources to create a comprehensive 3D representation without requiring full 3D x-ray imaging.
2Measurement precision
If three-dimensional x-ray techniques are used to obtain complete tooth information including roots, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the imaging process into two simpler, more accessible components: standard optical scanning equipment for the crown and conventional 2D x-ray machinery for the roots. This segmentation avoids the need for expensive, complex 3D x-ray imaging systems while still achieving complete tooth modeling through computational integration.
Solution Approach 2:
The patent introduces computational processing as an intermediary that bridges the gap between 2D x-ray images and 3D crown models. This computational mediator transforms and integrates data from two different imaging modalities into a unified 3D tooth model, eliminating the need for complex 3D x-ray hardware.
3Ease of operation
If optical scanning is used to model the tooth crown, then ease of operation is improved, but measurement precision deteriorates for root information below the gum line
Solution Approach 1:
The patent segments the tooth into two distinct regions (crown and root) and assigns different imaging modalities to each: optical scanning for the accessible crown portion and 2D x-ray for the hidden root portion. This segmentation allows each method to operate in its optimal range, with the crown scanned easily and the roots imaged through x-ray, then combined for a complete accurate model.
Solution Approach 2:
The patent uses computational algorithms as an intermediary to bridge the crown and root data. The system processes and integrates the 3D crown model with 2D root x-ray images, transforming them into a coordinated 3D tooth model that accurately represents both visible and hidden portions of the tooth structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach generates a precise three-dimensional tooth model that includes both crown and root information, reducing radiation exposure and costs, and improving the accuracy of dental prosthetics and orthodontic treatments.
Implementation Method 1
a two-dimensional x-ray image of a tooth is received
Data Source
AI summary
A three-dimensional (3D) model representing at least one tooth of a patient is received. A two-dimensional (2D) contour of the 3D model representing the at least one tooth of the patient is generated. The 2D contour with a 2D x-ray image of the at least one tooth of the patient to generate alignment data is aligned. The 3D model is updated based on the alignment data.