Dental Arch Transformation Matrix Generation via Digital Impressions
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Solution Overview
Problem
Current methods for obtaining transformation matrices in orthognathic operations are inefficient and inaccurate, relying on uncomfortable and time-consuming plaster cast impressions that can break easily and require storage, while also lacking precision.
Innovation Solution
A digital impression-based method where intraoral scanning data is used to create three-dimensional models of upper and lower dental arches, allowing for the determination of transformation matrices without traditional plaster casts, enabling accurate and efficient target occlusion planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional plaster cast impression taking process is used, then transformation matrices can be obtained for orthognathic operations, but the process is time-consuming, uncomfortable for patients, and requires storage of physical casts
Solution Approach 1:
The patent replaces the mechanical impression-taking process with optical scanning technology. Instead of using physical plaster casts and manual manipulation, the system uses intraoral scanners to capture digital impressions and generate three-dimensional models, which are then processed computationally to obtain transformation matrices. This substitution eliminates the time-consuming physical cast preparation while maintaining accuracy.
Solution Approach 2:
The patent creates digital copies (three-dimensional models) of the dental arches instead of physical plaster casts. These digital models can be manipulated virtually to determine target occlusion and transformation matrices, eliminating the need for physical cast storage and manipulation while preserving all necessary information.
2Reliability
If plaster casts are used for target occlusion determination, then transformation matrices can be obtained, but the casts can break easily and require storage space
Solution Approach 1:
The patent uses digital three-dimensional models as copies of the dental arches, which are inherently more durable than physical plaster casts. These digital models can be stored, manipulated, and reproduced without risk of breaking, while maintaining the accuracy needed for determining transformation matrices and target occlusion.
3Measurement precision
If complete buccal scan of physical models is performed, then accurate transformation matrices can be determined, but the scanning process becomes more time-consuming
Solution Approach 1:
The patent extracts only the essential information needed for determining transformation matrices from the complete buccal scan. By identifying and scanning only the critical regions or features that contribute to transformation matrix calculation, the system reduces scanning time while maintaining the precision required for accurate surgical planning.
Solution Approach 2:
The patent applies partial scanning by focusing only on the necessary portions of the dental models rather than performing complete scans. This selective approach captures sufficient data for transformation matrix determination without the time cost of comprehensive scanning, achieving adequate precision with reduced effort.
Data Source
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AI summary
The invention discloses a solution for generating transformation matrices associated with upper and lower: dental arches. A digital impression of the upper and lower dental arches, or a first digital impression of the upper dental arch and a second digital impression of the lower dental arch is obtained, and a digital three-dimensional model comprising the upper and lower dental arches, or a first digital three-dimensional model comprising the upper dental arch and a second digital three-dimensional model comprising the lower dental arch is/are generated based on the digital impression(s). The digital three-dimensional model(s) is/are output to produce separate physical three-dimensional models of the upper and lower dental arches. Scanning data associated with a desired target occlusion is obtained, the desired target occlusion being obtained based on a desired mutual position of the physical three-dimensional models of the upper and lower dental arches. The transformation matrices of the upper and lower dental arches to the desired target occlusion are determined based on the scanning data and the digital impression(s).