Abstract
Background: Temporomandibular disorder (TMD) is a collective term covering acute or chronic musculoskeletal and neuromuscular pain associated with the masticatory muscles, temporomandibular joint, and the associated structures. The surface electromyography (sEMG) test represents clinical potential as an additional diagnostic tool. The purpose of this study was to evaluate differences in masseter and temporalis muscle activity (in sEMG) in subjects with TMD compared to a control group. Methods: The TMD group included 45 people qualified according to the diagnostic criteria for temporomandibular disorder (DC/TMD). In the control group, there were 30 subjects. All participants underwent detailed examinations including sEMG diagnosis of the masseter and temporalis muscles. The sEMG was measured both at rest and during maximal voluntary contraction (MVC). Amplitude root mean square (ARMS) values for the analysis were determined. Results: No differences were shown in the value of the results between TMD and control group in RS ARMS transformed data values (p = 0.086) and in the MVC ARMS transformed data values (p = 0.536). The presence of TMD has no significant effect on the symmetry index value for the temporalis (p = 0.42) and masseter muscles (p = 0.379). Conclusions: Analysis of both raw and normalized sEMG signals is insufficient to differentiate TMD patients from healthy individuals.
Published Version
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