Evaluating muscle asymmetry from electromyographic signals for bruxism patients

Bruxism, characterized by the habitual grinding or clenching of teeth, has prompted a growing interest in assessing muscle asymmetry using electromyographic signals within the dental field. This study, conducted at Bahcesehir University, focuses on evaluating muscle asymmetry during periods of rest, maximal voluntary contraction (MVC), and teeth contact in individuals with bruxism. A participant pool of twenty-five individuals, identified through self-diagnosis questionnaires and clinical examinations, underwent surface electromyography (sEMG) measurements of the masseter and temporalis muscles. The analysis revealed significant differences in asymmetry and root mean square (RMS) during MVC, with bruxism individuals exhibiting higher asymmetry in the masseter muscle, indicating an imbalance in muscle activation. Notably, the Temporalis muscles displayed significant asymmetry during MVC in bruxism patients, suggesting potential differences in muscle behavior and motor control. During rest and teeth contact, bruxism patients exhibited higher activation in the temporalis muscles compared to the masseter muscles, indicating altered muscle activity patterns. Additionally, the asymmetry between the left and right sides of the masseter muscle during teeth contact was higher in bruxism patients. These findings might improve bruxism diagnosis and treatment. Addressing muscle asymmetry is vital for better outcomes. Further research is needed for personalized interventions in managing bruxism-related muscle alterations. Keywords: Bruxism, Surface Electromyography (sEMG), Bruxism Diagnosis, Bruxism Treatment