Repeatability of the calibration protocol for EMG evaluation of the occlusion with the Teethan device
DOI:
https://doi.org/10.2478/AMB-2024-0059Keywords:
surface EMG, Teethan, calibration, standardization of EMG signalAbstract
Objective. The aim of the study was to investigate the repeatability of the calibration protocol performed by the Teethan® device (Teethan S.p.A. Italy) for surface electromyography (sEMG) when biting on cotton rolls to eliminate the effect of occlusal contacts. Materials and methods. Thirty-three fully dentate subjects aged 13-43 years (mean 21.33 years) of which 15 men and 18 women were enrolled in the study. All subjects had a good state of dental and periodontal health without temporomandibular disorders (TMDs).
Each examined participant performed two distinct maximal voluntary clenches on cotton rolls: the first one for calibration of the device and the second one for recording of the signals. The results were presented as the indices: Percentage overlapping coefficient
(POC), Barycenter (BAR), Torsion (TORS), Impact (IMPACT), Global index and Asymmetry (ASIM). Results. All the examined indices showed good repeatability during the test, compared with the normal values, determined by the manufacturer of the device. Some of
the recorded indices were insignificantly lower than the norm (POC TA, POC MM, BAR and TORS). Global index and IMPACT were within the reference values and showed highest repeatability in this study. Conclusion. Instrument calibration is an important prerequisite
for exact testing. The indices, recorded by this device are rather repeatable, with Global index and Impact found to be the most repeatable ones. The values of the measured indices show that the process of calibration is highly reliable.
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