Synchronized Dental Model and Video Views for Margin Marking
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Solution Overview
Problem
Current dental scanning technologies face challenges in accurately capturing three-dimensional data around the margin of a prepared tooth surface due to obstacles like tissue collapse, blood, and saliva, leading to ambiguities in digital models.
Innovation Solution
The method involves supplementing three-dimensional digital models with synchronized still images from video data acquired during scanning, allowing for improved visualization and interaction to disambiguate surface features, particularly for margin marking in dental restorations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If intra-oral scanning is performed to capture digital dental impressions, then three-dimensional data of dentition is obtained, but ambiguities occur in margin areas due to tissue collapse, blood, and saliva obscuring the margin
Solution Approach 1:
The patent transitions from relying solely on three-dimensional model data to incorporating two-dimensional video images captured during scanning. This multi-dimensional approach allows margin verification by comparing 3D model ambiguities with 2D video evidence, where the video provides complementary visual information about margin conditions that the 3D model cannot capture due to physical obstacles like tissue collapse and saliva.
2Loss of information
If video data is captured during scanning to supplement three-dimensional models, then margin disambiguation is improved, but data processing complexity increases
Solution Approach 1:
The patent merges video data acquisition and processing into the existing intra-oral scanning system. The video camera is integrated with the scanning probe, and video frames are captured simultaneously with three-dimensional data acquisition. This consolidation allows margin disambiguation without requiring separate imaging equipment or complex post-processing workflows, as the synchronized video and model data are processed together through a unified software interface.
3Ease of operation
If synchronized video and model views are implemented, then interactive margin marking is enhanced, but computational requirements increase
Solution Approach 1:
The patent performs preliminary synchronization of video frames with three-dimensional model views during the scanning process itself. Video data is captured and time-stamped concurrently with model acquisition, allowing the system to pre-align corresponding video frames with model perspectives before margin marking begins. This preliminary synchronization eliminates the need for complex real-time computational alignment during interactive margin marking, reducing energy consumption while maintaining ease of operation.
Data Source
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AI summary
Tools are described for preparing digital dental models for use in dental restoration production processes, along with associated systems and methods. Dental modeling is improved by supplementing views of three-dimensional models with still images of the modeled subject matter. Video data acquired during a scan of the model provides a source of still images that can be displayed alongside a rendered three-dimensional model, and the two views (model and still image) may be synchronized to provide a common perspective of the model's subject matter. This approach provides useful visual information for disambiguating surface features of the model during processing steps such as marking a margin of a prepared tooth surface for a restoration. Interactive modeling tools may be similarly enhanced. For example, tools for margin marking may synchronize display of margin lines between the still image and the model so that a user can interact with either or both of the visual representations, with changes to a margin reflected in both displays.