Masseteric electromyographic silent period duration in patients with temporomandibular joint dysfunction
Braz. j. med. biol. res
;
24(3): 261-6, mar. 1991. tab
Artigo
em Inglês
| LILACS
| ID: lil-99561
RESUMO
The present study compared the duration of the electromyographic silent period (SP) of the masseter muscles elicited by chin-tapping in normal asymptomatic adults (N=39) and in a group with sympstoms of temporomandibular joint dysfunction (TMJD)(N=3).EMG activity was recorded from right (RM) and left (LM) masseter muscles using bipolar surface electrodes coupled to a DISA 1500 EMG-system.During maximal clenching, ten taps were applied downwards to the chin with a reflex hammer. The mean SP durations obtained for the normal group were 25.45ñ4.20 ms (RM) and 25.33ñ4.18ms (LM), whereas the TMJD group presented significantly greater values (P<0.01,Student t-test) of 41.89ñ12.94ms (RM) and 42.40ñ12.99ms (LM).The upper limits of normality calculated for RM and LM were 32.36 ms and 31.21 ms, respectively. Eighty-four percent of patients with TMJD showed SP durations above these limits. The results indicate that the measurement of masseteric SP duration may be used as an objective diagnostic method of TMJ disorders, provided that borderline values are interpreted with caution along with clinical impressions
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Índice:
LILACS (Américas)
Assunto principal:
Síndrome da Disfunção da Articulação Temporomandibular
/
Músculo Masseter
Tipo de estudo:
Estudo diagnóstico
Limite:
Adolescente
/
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
1991
Tipo de documento:
Artigo
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