Toothbrush with Fluorescent Plaque and Calculus Detection
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Solution Overview
Problem
Conventional dental plaque detection methods cannot distinguish between dental plaque and dental calculus, leading to excessive brushing that may cause gum damage and periodontal disease, as they collectively detect the presence of both based on fluorescent light intensity.
Innovation Solution
A toothbrush with a light emission and reception unit that emits light to the tooth surface, a detection unit to identify the presence of dental plaque or calculus, and a determination unit to differentiate between the two by determining if dental calculus remains after a predetermined period of brushing, reducing excessive brushing through vibration control and notification systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fluorescent light intensity detection is used to detect biological deposits, then dental plaque and dental calculus can be collectively detected, but they cannot be distinguished from each other
Solution Approach 1:
The detection process is segmented into two stages: initial detection of biological deposits using fluorescent light intensity, followed by a predetermined period observation to detect changes in fluorescence characteristics. This segmentation allows the system to first identify the presence of any biological deposit collectively, then differentiate between plaque and calculus based on how the fluorescence changes over the observation period.
Solution Approach 2:
The system performs preliminary detection of biological deposits using fluorescent light intensity before proceeding to the differentiation stage. By establishing the initial fluorescence baseline and then observing changes over a predetermined period, the system prepares the data necessary for accurate distinction between plaque and calculus without requiring complex additional sensors from the start.
2Reliability
If users continue toothbrushing based on detection results, then dental plaque can be removed, but excessive brushing may occur after plaque is removed and only dental calculus remains
Solution Approach 1:
The system provides continuous feedback to the user during the predetermined observation period by monitoring changes in fluorescent light intensity. When the fluorescence characteristics indicate that only dental calculus remains (i.e., no significant change over the observation period), the system signals the user to stop brushing that region, preventing excessive brushing and potential gum damage while ensuring plaque is thoroughly removed.
Solution Approach 2:
The brushing guidance is dynamically adjusted based on real-time detection results during the predetermined period. The system transitions from a static brushing recommendation to a dynamic, adaptive guidance system that modifies brushing instructions based on the observed changes in fluorescence, allowing users to respond appropriately to the actual state of their teeth and gums.
3Measurement precision
If light emission and reception units are added to the toothbrush, then dental plaque and calculus can be differentiated, but device complexity increases
Solution Approach 1:
The toothbrush integrates multiple functions into a single device: mechanical brushing, fluorescent light emission, light intensity detection, and time-based observation. By making the toothbrush multi-functional, the system achieves accurate differentiation between plaque and calculus without requiring separate standalone devices, thereby managing complexity through functional integration rather than proliferation of components.
Solution Approach 2:
The toothbrush performs self-detection and self-guidance functions by incorporating the light emission and reception units directly into the brush head. The device autonomously monitors its own performance and provides real-time feedback to the user, eliminating the need for external detection equipment or complex manual assessment procedures, thus achieving high measurement precision with relatively simple added components.
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
The toothbrush effectively determines when dental plaque is removed and only dental calculus remains, reducing the risk of gum damage and periodontal disease by adjusting brushing intensity and notifying the user to change brushing regions.
Implementation Method 1
a light emission unit configured to emit light through a specific region of the bristle raising surface to a tooth surface, and a light reception unit configured to receive radiated light from the tooth surface resulting from the light through the specific region
Data Source
AI summary
A toothbrush of the present invention includes: a main body including a head portion having a bristle raising surface on which bristles are provided in a standing manner; a light emission unit configured to emit light through a specific region of the bristle raising surface to a tooth surface; and a light reception unit configured to receive radiated light from the tooth surface resulting from the light through the specific region, the light emission unit and the light reception unit being provided in the main body. The toothbrush also includes a detection unit configured to collectively detect whether or not dental plaque or dental calculus is present on the tooth surface based on an output from the light reception unit. The toothbrush further includes a determination unit configured to determine that dental calculus is present on the tooth surface.