Augmented 3D Tooth Root Model Generation
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Solution Overview
Problem
Current orthodontic treatment planning methods face challenges in accurately reconstructing tooth roots without requiring computationally expensive imaging techniques like CT or MR scans, which are not always readily available, and struggle to merge root and crown data effectively for precise 3D models.
Innovation Solution
A method and system for generating an augmented 3D digital model of a tooth by shifting and weighting root vertices based on a preliminary model derived from crown data, eliminating the need for root imaging data, and improving the accuracy of root representation in orthodontic planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CT or MR imaging techniques are used to obtain root portion data, then measurement precision of root parameters is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent creates a digital 3D copy of the root portion by merging crown image data with a library of root models. Instead of using complex CT or MR imaging to directly capture root data, the system generates a digital replica by combining available crown imagery with pre-stored root morphology data, achieving accurate root representation without expensive imaging equipment
Solution Approach 2:
The patent performs preliminary actions by pre-storing multiple root portion models in a library before the actual treatment planning process. These pre-prepared root models contain various anatomical configurations that can be selected and merged with crown data, eliminating the need for complex root imaging during the clinical procedure
2Manufacturing precision
If CT or MR imaging techniques are used to obtain root portion data, then manufacturing precision of 3D tooth model is improved, but loss of time and accessibility worsen
Solution Approach 1:
The system creates accurate 3D tooth models by digitally merging crown imagery with pre-stored root models from a library. This digital copying approach eliminates the time-consuming process of scheduling and performing CT or MR scans, providing complete 3D tooth representations immediately from routine optical scans
Solution Approach 2:
Root portion models are pre-prepared and stored in a library before clinical use. During treatment planning, the system selectively merges appropriate pre-existing root models with captured crown data, eliminating the need for time-consuming root imaging procedures during patient visits
3Ease of manufacture
If generic root portion models are used to reconstruct roots, then ease of manufacture is improved, but manufacturing precision of root representation deteriorates
Solution Approach 1:
The patent applies different quality levels to different parts of the tooth model. Crown portions use high-resolution optical scan data for precise representation, while root portions use selectively merged models from a library. This localized approach allows each region to be represented with appropriate detail based on its specific requirements
Solution Approach 2:
The system changes parameters by selectively choosing from multiple root models in the library based on specific anatomical parameters. Instead of using a single generic root model, the system selects and merges root models that match specific anatomical features, transforming the reconstruction from a one-size-fits-all approach to a parameter-driven selective merging process
Data Source
AI summary
A method, executable by a processor, of generating a 3D digital model associated with a given tooth is disclosed. The method includes obtaining a preliminary root 3D digital model of a root portion the given tooth, and then generating an augmented root 3D digital model therefrom by obtaining data of a longitudinal axis of the given tooth, and data indicative of a tooth gingiva segmentation contour between the crown and root portions; determining for each root vertex, a respective new position relative to the longitudinal axis in which the respective new position is defined by a shift distance value and a shift direction vector; moving each of the root vertices to their respective new position by applying their respective shift distance values along their respective shift direction vector; and storing the augmented root 3D digital model for determining an orthodontic treatment for the subject.