Oral Cavity 3D Scan Alignment Using an Impression Model
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Solution Overview
Problem
Three-dimensional scanners face difficulties in scanning specific parts of the oral cavity, such as the bore part of a root canal or margin line of a prep tooth, leading to incomplete scan data acquisition.
Innovation Solution
An electronic device that communicates with a three-dimensional scanner to acquire first and second scan data, inverts one of the datasets, determines overlapping areas, and aligns them to generate a comprehensive three-dimensional image model by combining the inverted and non-inverted scan data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-dimensional scanner is used to scan the oral cavity of a subject, then scan data for the oral cavity can be acquired, but scan data for specific parts (such as bore part of root canal or margin line of prep tooth) cannot be acquired
Solution Approach 1:
The patent creates a copy of the oral cavity by making an impression model from the subject's oral cavity. This impression model serves as a surrogate that can be scanned to obtain scan data for specific difficult-to-access areas like root canal bore parts and margin lines, which cannot be directly scanned in the actual oral cavity.
Solution Approach 2:
The impression model acts as an intermediary between the oral cavity and the three-dimensional scanner. Instead of attempting to scan difficult areas directly in the oral cavity, the impression model is used as a mediator that captures these difficult-to-access regions, allowing the scan data to be obtained indirectly.
2Measurement precision
If impression scan data is acquired to align with oral scan data, then complete scan data can be obtained, but the process complexity increases
Solution Approach 1:
The patent inverts the impression model to align it with the oral cavity scan data. By inverting the impression model, the scan data obtained from the impression model can be properly oriented and merged with the original oral cavity scan data, enabling accurate alignment and integration of the complete scan data.
Solution Approach 2:
The patent merges the oral cavity scan data and the impression model scan data into a single comprehensive three-dimensional image model. By combining these two data sources through inversion and alignment, the system achieves complete scan data coverage while integrating the information from both scanning processes.
Data Source
AI summary
An electronic device of the present disclosure is configured to acquire first scan data by a first scan performed by a three-dimensional scanner to scan an oral cavity of a subject, acquire second scan data by a second scan performed by the three-dimensional scanner to scan an impression model modeled on the oral cavity of the subject, invert one of the first scan data and the second scan data, determine whether an overlapping area exists between inverted scan data and non-inverted scan data, among the first scan data and the second scan data, and generate, if the overlapping area exists, a three-dimensional image model for the oral cavity of the subject by aligning the inverted scan data and the non-inverted scan data based on the overlapping area.