Caries Detection Device Using Segmented Fluorescence and Raman Spectroscopy
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Solution Overview
Problem
Conventional Raman spectroscopy-based caries detection techniques require extended integration times due to weak Raman scattered light intensity, leading to prolonged diagnosis times and patient discomfort.
Innovation Solution
A caries detection device incorporating a screening optical system for near-infrared light transmission and fluorescence detection, combined with a Raman scattered light detection system that selectively irradiates and detects Raman scattered light from identified caries candidate areas, allowing for quicker signal acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Raman spectroscopy is used for caries detection, then measurement precision is improved, but measurement time increases due to weak signal intensity
Solution Approach 1:
The tooth surface is divided into multiple regions, with candidate caries areas identified through fluorescence imaging. Raman spectroscopy is then selectively applied only to these identified candidate regions rather than the entire tooth surface, reducing total measurement time while maintaining detection accuracy
Solution Approach 2:
Fluorescence imaging is performed as a preliminary screening step to identify candidate caries areas before conducting Raman spectroscopy. This preliminary action narrows down the measurement locations, allowing subsequent Raman measurements to be focused only on suspicious regions, thereby reducing overall diagnosis time
2Measurement precision
If integration time is extended to obtain sufficient signal intensity, then measurement precision is improved, but patient comfort deteriorates due to prolonged mouth opening
Solution Approach 1:
The measurement process is segmented into two phases: rapid fluorescence screening to identify candidate areas, followed by focused Raman spectroscopy only on these small candidate regions. This segmentation reduces the total measurement time required to achieve sufficient signal intensity, thereby improving patient comfort
Solution Approach 2:
Raman spectroscopy is applied locally only to identified candidate caries areas rather than the entire tooth surface. This localized approach concentrates measurement resources on suspicious regions, achieving sufficient signal intensity faster and reducing the time patients need to keep their mouths open
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
Enables caries detection in a shorter period by focusing Raman spectroscopy on specific candidate areas, reducing overall measurement time and minimizing the risk of erroneous diagnoses.
Implementation Method 1
a screening optical system that irradiates a tooth with first inspection light from a light source and detects transmitted light through the tooth or fluorescence generated from the tooth
Implementation Method 2
a Raman scattered light detection optical system that irradiates a caries candidate area, which is identified from information of the transmitted light or the fluorescence detected by the screening optical system, in the tooth with second inspection light from the light source and detects Raman scattered light generated from the caries candidate area
Data Source
AI summary
A caries detection device includes: a screening optical system that irradiates a tooth with a near-infrared ray from a light source to detect transmitted light through the tooth; and a Raman scattered light detection optical system that irradiates a caries candidate area of the tooth detected from information of the transmitted light with a near-infrared ray from the light source to detect Raman scattered light generated from the caries candidate area.