3D Dental Scan Motion Compensation for Distortion Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dental scanning technologies face challenges in accurately capturing three-dimensional data due to motion artifacts caused by scanner movement and patient jaw movements, leading to geometric distortions and inaccuracies in tooth reconstructions.
Innovation Solution
A system and method for motion compensation in three-dimensional scanning using a combination of a 3D scanner, a 2D imager, and position tracking devices to estimate and correct for motion trajectories, employing optical flow and rigid body transformations to align and correct scan data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional 3D scanning is used without motion compensation, then the scanning process is simple and fast, but motion artifacts and geometric distortions occur due to scanner movement and patient jaw movements
Solution Approach 1:
The patent introduces position tracking devices as intermediaries that monitor scanner movement and patient jaw position independently, providing motion data that is then used to compensate for artifacts in the 3D scan. This mediator approach allows the system to maintain simple scanning operations while adding precision through separate motion monitoring and compensation processes.
Solution Approach 2:
The system implements feedback by continuously monitoring scanner position and patient jaw movement through position tracking devices, then using this feedback information to dynamically adjust and compensate for motion artifacts in the scan data. This closed-loop approach improves measurement precision without requiring the scanner itself to become more complex.
2Manufacturing precision
If motion compensation using position tracking devices and optical flow is implemented, then geometric distortions are reduced and scan accuracy improves, but the system complexity and processing requirements increase
Solution Approach 1:
The system performs preliminary motion tracking and trajectory estimation before final tooth reconstruction. By pre-capturing position data from tracking devices and estimating motion trajectories in advance, the system prepares compensation data that simplifies the subsequent reconstruction process, reducing overall processing complexity while maintaining high precision.
Solution Approach 2:
The motion compensation process is segmented into distinct components: position tracking, motion trajectory estimation, optical flow analysis, and final scan compensation. This segmentation allows each component to be processed independently and optimized separately, reducing the complexity of the overall system while achieving high reconstruction precision.
Data Source
AI summary
Systems and computer implemented methods that include motion compensation in a three-dimensional (3D) scan. Motion compensation can include receiving 3D scans of a dentition, registering a distorted scan of the 3D scans with a previous scan and a subsequent scan of the 3D scans, estimating a motion trajectory from the previous scan to the subsequent scan, and calculating a corrected scan for the distorted scan by compensating for the motion trajectory from the previous scan to the subsequent scan.