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Open AccessArticle

Accelerometry-Enhanced Magnetic Sensor for Intra-Oral Continuous Jaw Motion Tracking

Biomedical Engineering Institute, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
Investigo, UAB, Draugystės g. 17-1, LT-51229 Kaunas, Lithuania
Faculty of Electrical and Electronics Engineering, Kaunas University of Technology, Studentų g. 50, LT-51368 Kaunas, Lithuania
Author to whom correspondence should be addressed.
This mansucript is extension version of the conference paper: Jarm, T.; Cvetkoska, A.; Mahnič-Kalamiza, S.; Miklavcic, D. Investigation of Magnetic Sensor for Intra-oral Continuous Jaw Tracking. In Proceedings of the 8th European Medical and Biological Engineering Conference (EMBEC 2020), Portorož, Slovenia, 29 November–3 December 2017.
Academic Editor: Jason Friedman
Sensors 2021, 21(4), 1409;
Received: 17 December 2020 / Revised: 1 February 2021 / Accepted: 7 February 2021 / Published: 18 February 2021
(This article belongs to the Special Issue Biomedical Sensing for Human Motion Monitoring)
Currently available jaw motion tracking methods require large accessories mounted on a patient and are utilized in controlled environments, for short-time examinations only. In some cases, especially in the evaluation of bruxism, a non-restrictive, 24-h jaw tracking method is needed. Bruxism oriented, electromyography (EMG)-based devices and sensor-enhanced occlusal splints are able to continuously detect masticatory activity but are uninformative in regards to movement trajectories and kinematics. This study explores a possibility to use a permanent magnet and a 3-axial magnetometer to track the mandible’s spatial position in relation to the maxilla. An algorithm for determining the sensor’s coordinates from magnetic field values was developed, and it was verified via analytical and finite element modeling and by using a 3D positioning system. Coordinates of the cubic test trajectory (a = 10 mm) were determined with root-mean-square error (RMSE) of 0.328±0.005 mm. Possibility for teeth impact detection by accelerometry was verified. Test on a 6 degrees-of-freedom (DOF), hexapod-based jaw motion simulator moving at natural speed confirmed the system’s ability to simultaneously detect jaw position and the impacts of teeth. Small size of MEMS sensors is suitable for a wearable intra-oral system that could allow visualization of continuous jaw movement in 3D models and could enable new research on parafunctional jaw activities. View Full-Text
Keywords: 3D jaw tracker; mastication; trajectory; bruxism evaluation 3D jaw tracker; mastication; trajectory; bruxism evaluation
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MDPI and ACS Style

Jucevičius, M.; Ožiūnas, R.; Mažeika, M.; Marozas, V.; Jegelevičius, D. Accelerometry-Enhanced Magnetic Sensor for Intra-Oral Continuous Jaw Motion Tracking. Sensors 2021, 21, 1409.

AMA Style

Jucevičius M, Ožiūnas R, Mažeika M, Marozas V, Jegelevičius D. Accelerometry-Enhanced Magnetic Sensor for Intra-Oral Continuous Jaw Motion Tracking. Sensors. 2021; 21(4):1409.

Chicago/Turabian Style

Jucevičius, Mantas; Ožiūnas, Rimantas; Mažeika, Mindaugas; Marozas, Vaidotas; Jegelevičius, Darius. 2021. "Accelerometry-Enhanced Magnetic Sensor for Intra-Oral Continuous Jaw Motion Tracking" Sensors 21, no. 4: 1409.

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