EMG-CHARACTERISTICS OF MASTICATORY MUSCLES IN SUBJECTS WITH BRUXISM

Today, bruxism is a fairly common phenomenon. Bruxism often defined as the parafunctional activity of masticatory and facial muscles. Parafunction called increased inappropriate activity, tension or even spasm muscles, well muscles tongue. However, peculiarity work during day in patients with signs remains insufficiently studied.
 The aim our study was to determine features EMG-activity bruxism.
 Materials methods research. We performed clinical examination superficial electromyography (EMG) 13 subjects aged 25 43 years. There were 7 women (53.8%), 6 men (46.2%). All examined somatically healthy, had no bad habits defects dental arches. mean age 32.5 ± 5.4 In sample patients, there such pathological abrasion hard tissues teeth; point dentin exposure; cracks tooth enamel; hyperesthesia; pain feeling discomfort anterior temporal masseter using 4-channel computerized electromyograph, according recommendations by Ferrario V., Sforza C. Electrical biopotentials registered tests lasting 10 s each: maximum bilateral teeth clenching, clenching on left side; right side. data obtained EMG processed Synapsis software from Neurotech. analyzed indicators amplitude, amplitude (μV) each muscle every test. For objective evaluation results, we 15 comparable sex without (control group, 33.4 6.1 years).
 Research results. determined characteristics control group test clenching: symmetrical sides (p> 0.05), value contractions did not exceed 1200 μV. It found higher working side, compared balancing one unilateral that statistically confirmed (p<0,05).
 bruxism, differed group. Thus, all significantly (p <0.05) among people bruxism. majority cases (10 – 76.9%) greater than temporal. slightly but difference side 0.05). bruxism: presence rhythmic peaks resting phase. Differences between evaluated analyses Student’s paired t-test. hypotheses verified at level significance p<0,05.
 Conclusions. complex problem whole human body, characterized neuromuscular activity. study, some studied established. Patients values maximum, which are 2.3-3.5 times normal. most cases, Presence phase found. future, it planned individual changes different stages total rehabilitation.