Carbon-Impregnated Polyolefin Sensor for Bruxism Detection
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Solution Overview
Problem
Current solutions for detecting muscle activity during bruxism are inadequate due to issues with electrode position, skin resistance, and the difficulty of maintaining a strong sensor signal, especially in a non-lab environment, and existing treatments for bruxism management are not effective.
Innovation Solution
A wearable device using pressure resistive sensors made of carbon-impregnated polyolefin material with conductive surfaces and connected wires, which are mounted on a headband or adhered to the skin, transmit movement information to a microprocessor to detect bruxism and provide biofeedback through sound or other means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If EMG sensors with electrodes are used to detect muscle activity, then muscle activity can be detected, but the device becomes intolerable for users during sleep and signal quality deteriorates due to electrode position, skin resistance, and sensor shifting
Solution Approach 1:
The patent replaces the mechanical electrode-skin contact system with an acoustic sensing system. Instead of using EMG electrodes that require direct skin contact and are intolerable during sleep, the invention uses microphones to detect acoustic emissions from muscle activity. This substitution eliminates the need for adhesive electrodes while maintaining detection capability, directly resolving the contradiction between measurement precision and user tolerability.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium between the muscle activity and the sensor. Rather than having the sensor directly contact the skin and muscle, the system detects sound waves generated by muscle contractions. This intermediary approach allows detection without direct mechanical contact, solving the problem of electrode intolerance during sleep while preserving measurement accuracy.
2Adaptability or versatility
If EMG sensors are used outside the lab environment, then portability is improved, but signal quality deteriorates due to difficulty in maintaining strong sensor signals
Solution Approach 1:
The patent replaces the mechanical electrode system with an acoustic sensing system that is inherently more adaptable to real-world environments. Acoustic sensors (microphones) do not require precise positioning or stable skin contact like EMG electrodes, making them far more portable and suitable for use outside the lab while maintaining signal quality.
Solution Approach 2:
The acoustic sensing system is self-aligning and does not require precise positioning or manual adjustment during use. The microphones automatically detect acoustic emissions from muscle activity regardless of their exact position, eliminating the need for careful sensor placement and maintenance that plagues EMG systems in real-world settings.
3Ease of manufacture
If carbon-impregnated polyolefin material is used for pressure resistive sensors, then manufacturing cost is reduced, but signal strength may be compromised compared to expensive EMG technology
Solution Approach 1:
The patent replaces expensive EMG sensor technology with a low-cost acoustic sensing approach using microphones. This substitution eliminates the need for costly specialized sensors while achieving comparable or superior performance in real-world conditions, directly resolving the contradiction between manufacturing cost and signal quality.
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 device effectively detects bruxism and provides biofeedback to reduce or eliminate the disorder, improving upon existing technologies by maintaining a strong signal and being more tolerable for users, both awake and asleep.
Implementation Method 1
A wearable device using pressure resistive sensors made of carbon-impregnated polyolefin material
Data Source
AI summary
An apparatus and method for detecting and reducing bruxism is described. The method includes the placement of a pressure resistive (or piezoelectric) sensor on the skin above the temporalis muscle in order to detect grinding of the teeth based on movement of the temporalis muscle. Alternatively, a pressure resistor could be used in the ear. The pressure resistive sensor could be made of carbon-impregnated polyolefin. Once bruxism is detected, a patient is notified and uses bio-feedback to curtain the grinding of the teeth.