This study aimed to analyze the influence of temporomandibular joint disorder (TMD) on surface electromyography activity in the masseter muscles. Dolichofacial patients (n = 22) aged 15 to 35 years were examined: 11 with TMD and 11 control subjects without TMD. A standardized surface electromyography recording was performed on the masticatory muscle during 5 s of maximum voluntary contraction on cotton rolls. The root mean square value of each muscle was calculated and analyzed for differences using an unpaired Student’s t-test. Spearman’s correlation coefficients (r) were calculated for the determination of correlations between TMD and root mean square values. Surface electromyography revealed significant differences in the right and left masseter during maximum voluntary contraction. Both sides of the masseter muscles also showed a negative correlation with TMD. During maximum voluntary contraction, TMD patients had relatively lower elevator muscle activity. Electromyographic activities in the masseter muscles were lower in dolichofacial patients with TMD than non-TMD. Surface electromyography of masticatory muscles may assist the clinical assessment of TMD patients.
|Number of pages||4|
|Journal||Journal of International Dental and Medical Research|
|Publication status||Published - 2021|
- Temporomandibular Joint Disorder