Structured Light and OCT Intraoral Scanning for Subgingival Imaging
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Solution Overview
Problem
Existing scanning systems fail to accurately capture subgingival tooth structure, are painful for patients due to the need for gingiva manipulation, and lack the ability to detect caries, periodontitis, and cancers.
Innovation Solution
A multimodal scanning system combining structured light and OCT scanning to generate accurate three-dimensional models of intraoral structures, including both surface and subsurface data, which can be used for orthodontic and restorative treatment planning, and detect oral lesions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional intraoral scanning methods are used to capture subgingival tooth structure, then the margin line can be scanned, but the process is painful and time-consuming involving gingiva manipulation and local anesthetic
Solution Approach 1:
The patent replaces mechanical gingiva manipulation with optical imaging technology. The intraoral camera captures images of the tooth margin line and subgingival structures using light reflection and optical zoom, eliminating the need for physical retraction forces that cause patient pain and discomfort.
Solution Approach 2:
The patent introduces an intermediary optical system consisting of the intraoral camera, light source, and imaging processor. This intermediary captures and processes visual information of the subgingival margin line without requiring direct mechanical access, thereby avoiding harm to the patient while maintaining measurement precision.
2Loss of information
If existing scanning systems are used, then surface tooth structure can be captured, but subgingival tooth structure and internal structures cannot be accurately acquired
Solution Approach 1:
The patent creates a multi-functional intraoral scanning system that combines surface scanning, subgingival imaging, and internal structure visualization capabilities into a single device. The system uses an intraoral camera with optical zoom, light sources, and image processing to universally capture all required dental structures without requiring multiple separate devices.
3Adaptability or versatility
If conventional scanning methods are used, then basic tooth geometry can be obtained, but detection of caries, periodontitis, and cancers is not possible
Solution Approach 1:
The patent implements feedback through advanced image processing algorithms that analyze captured images for signs of caries, periodontitis, and oral cancers. The system processes optical images to provide diagnostic information, enabling the scanner to not only capture geometry but also assess oral health conditions with high precision.
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
Provides pain-free scanning of subgingival structures, enhances treatment planning accuracy, and enables early detection of oral health issues like caries and cancers.
Implementation Method 1
a structured light projector located at a proximal end of the probe and configured to project light out of a distal end of the probe
Implementation Method 2
generating volumetric scan data of an internal structure of the intraoral structure with OCT scanning, including subsurface volumetric scan data
Data Source
AI summary
A method of multimodal scanning may include generating surface scan data of an intraoral structured using structured light. The method may include generating volumetric scan data of an internal structure of the intraoral structure with OCT scanning. The OCT scan data may be aligned with the surface scan data. A three-dimensional volumetric model of the patient's dentition may be generated based on the aligned OCT scan data and the surface scan data.