Behavior analysis of electromyographic activity of the masseter muscle in sleep bruxers.
The effects of occlusal splint on the electric activity of masseter were studied in 15 women who presented sleep bruxism using surface electromyography. Sleep bruxism was defined by its clinical characteristics. The signal acquisition was done during mandible occlusion without clenching and maximum voluntary contraction in two situations. The first was after a workday without using the occlusal splint; and the second, after a sleeping night using occlusal splints. Evaluating masseter muscles during mandible occlusion without clenching, it could be observed that lower values were noticed after splint wearing in both sides. The same results were verified in maximum voluntary contraction (MVC). These results confirmed that the use of occlusal splints reduced the electromyographic activity of the right and left masseters, showing its myorelaxing effect.
Department of Mechanical Engineering (FEG), São Paulo State University - UNESP, Guaratingueta - SP, Brazil. cesar@emgsystem.com.br
César Ferreira
CF
Amorim
Lilian Chrystiane
LC
Giannasi
Luciano Maia Alves
LM
Ferreira
Márcio
M
Magini
Claudia S
CS
Oliveira
Luis Vicente Franco
LV
de Oliveira
Tamotsu
T
Hirata
Fabiano
F
Politti
D000223:Adaptation, Psychological; D000328:Adult; D004576:Electromyography / Q000295:instrumentation / Q000379:methods; D005260:Female; D006801:Humans; D008334:Mandible / Q000502:physiology / Q000503:physiopathology; D008406:Masseter Muscle / Q000294:innervation* / Q000503:physiopathology; D009119:Muscle Contraction; D018482:Muscle, Skeletal / Q000294:innervation / Q000503:physiopathology; D017090:Occlusal Splints; D020186:Sleep Bruxism / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D012893:Sleep Wake Disorders / Q000503:physiopathology / Q000523:psychology; D013223:Statistics as Topic; D013315:Stress, Psychological