Intraoral Scan Post Positioning Using Auxiliary Feature Points
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Solution Overview
Problem
Intraoral scanning data obtained by existing scanners is limited by cumulative errors, leading to inaccurate determination of scan post positions and poor scanning accuracy for implantation.
Innovation Solution
A method and system for intraoral scanning that includes installing intraoral scan posts with auxiliary feature points, using a single-lens reflex photogrammetry system to obtain true value coordinates, and performing three-dimensional reconstruction based on auxiliary feature points to determine precise positioning information of scan posts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-data stitching solution is used for intraoral scanning, then scanning range is extended, but measurement precision deteriorates due to cumulative errors
Solution Approach 1:
The patent introduces scan posts with auxiliary feature points as intermediary reference objects during the scanning process. These scan posts serve as mediators that provide known reference positions to establish coordinate transformations between different scanning segments, thereby eliminating cumulative errors while maintaining extended scanning range through multi-segment stitching.
2Ease of operation
If existing intraoral scanner is used, then scanning operation is simple, but manufacturing precision deteriorates due to inability to determine accurate scan post positions
Solution Approach 1:
The system performs self-calibration by automatically recognizing auxiliary feature points on scan posts and computing coordinate transformation relationships without requiring manual intervention. The scanner autonomously determines scan post positions by matching scanned feature points with pre-stored reference data, thereby maintaining operational simplicity while achieving high implantation accuracy.
3Measurement precision
If auxiliary feature points and photogrammetry system are introduced, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a digital copy of the physical scan posts by pre-storing three-dimensional coordinate data and auxiliary feature point information in a database. This digital replica allows the system to match scanned feature points against reference data for automatic position determination, thereby achieving high measurement precision without requiring complex additional hardware beyond the standard scanner.
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
Enhances scanning accuracy by accurately determining the positioning of scan posts, enabling precise dental prosthesis design and implantation.
Implementation Method 1
using a single-lens reflex photogrammetry system to obtain true value coordinates
Data Source
AI summary
Embodiments of the present disclosure relate to a method and system for processing intraoral scanning, an electronic device, and a medium. The method includes: obtaining a positioning mode of a scan post in response to a request for scanning an oral cavity including scan posts, scanning the oral cavity to obtain target scanning data, and performing processing based on the positioning mode of the scan post and the target scanning data to determine positioning information of the scan posts.