Masseter EMG Electrode Placement for Bruxism Training
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Solution Overview
Problem
Existing bruxism treatments, such as oral appliances, are limited in effectiveness and comfort, and internal sensors for bruxism detection are unsuitable for long-term use due to interference with daily activities and difficulty in accurate self-placement of electrodes.
Innovation Solution
A bruxism training device with a locator region, alignment edge, and electrode assembly for external electromyography (EMG) that facilitates easy and repeatable electrode placement on the masseter muscle, allowing for accurate detection and monitoring of bruxism events without interfering with daily activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oral appliances are worn during sleep to treat bruxism, then the forces leading to damage are absorbed, but the appliances are limited in effectiveness and may not train users against continued bruxism
Solution Approach 1:
The device incorporates EMG sensors that detect masseter muscle activation and provide real-time feedback to the user through a mobile application. This feedback mechanism enables users to become aware of their bruxism behavior and actively work to reduce it, transforming the passive protection of oral appliances into an active training process that addresses the root cause of bruxism.
2Reliability
If oral appliances are worn during the day, then continuous protection is provided, but the appliances interfere with other activities such as eating or speaking
Solution Approach 1:
The invention extracts the monitoring and feedback functions from the traditional oral appliance and places them in a separate wearable device with electrodes that contact the skin over the masseter muscle. This separation allows the protective function to remain with the oral appliance while the monitoring function can operate independently without interfering with eating or speaking activities.
3Measurement precision
If internal sensors are used for bruxism detection, then direct muscle activity is measured, but the sensors are unsuitable for long-term use due to interference with daily activities
Solution Approach 1:
The system uses skin surface electrodes as intermediaries to detect masseter muscle activity without requiring internal sensors. These electrodes measure the electrical signals generated by muscle contraction through the skin, providing accurate bruxism detection while allowing long-term wear during sleep and daily activities without the discomfort or interference of internal devices.
4Measurement precision
If electrodes are placed for EMG measurement, then accurate bruxism detection is achieved, but accurate self-placement of electrodes is difficult
Solution Approach 1:
The wearable device incorporates alignment features and positioning guides that enable users to correctly position the electrodes over the masseter muscle area without requiring specialized knowledge. The device is designed with intuitive placement markers and flexible electrode arrangements that automatically align with the underlying muscle during normal wear, eliminating the need for complex self-placement procedures.
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 provides reliable and continuous bruxism detection and training, reducing events through feedback and historical analysis, while being comfortable for extended wear and requiring minimal maintenance.
Implementation Method 1
external electromyography (EMG) that facilitates easy and repeatable electrode placement on the masseter muscle, allowing for accurate detection and monitoring of bruxism events
Data Source
AI summary
A bruxism training device is disclosed that is capable of detecting bruxism events (e.g., jaw clenching and teeth grinding) via external electromyography (EMG). The training device is shaped to be easily placed in a proper location and proper orientation over a masseter muscle of a user. A locator region is provided to facilitate easy locating of a reference electrode over the gonial angle of the mandible, while an alignment edge of the training device is provided to facilitate easy locating of end electrodes adjacent an end of the masseter muscle coupled to the mandible. With the locator region and alignment edge in place, an array of mid electrodes is automatically positioned over a bulk of the masseter muscle, allowing useful EMG measurement to be acquired of masseter activation.