Article thumbnail

Does masticatory muscle hyperactivity occur in individuals presenting temporomandibular disorders?

By Fausto Bérzin Anamaria Siriani de Oliveira Rosemary Berto Delaine Rodrigues-Bigaton

Abstract

verify whether patients with temporomandibular disorders (TMD) present masticatory muscle hyperactivity with the mandible in the rest position. Method: Forty-six women were selected (18-33 years-old, mean age = 22.7 ± 3.52 years), 31 with TMD (experimental group) and 15 without TMD (control group). Electromyography (EMG) was performed in two situations: 1) with the mandible in the rest position and 2) in maximal dental clenching. RMS (root mean square) was used for EMG signal analysis. Data were analyzed statistically by the Mann Whitney U-test. Result: The experimental groups presented increased EMG activity of the muscles evaluated with the mandible in the rest position compared to the control. In maximal dental clenching, no differences were observed between the groups. Analyzing the percentage of EMG activity at rest, the control group presented EMG activity around 1 to 6% of maximal dental clenching and the experimental group, around 1 to 12% of the same activity. Conclusion: The experimental group presented an increase in EMG activity at rest in the studied muscles, mainly in the anterior portion of the temporal muscle, bilaterally. However, this increase should not be called muscular hyperactivity, but should rather be considered as an important sign of TMD

Topics: Temporomandibular joint dysfunction syndrome, Electromyography, Masticatory muscles., Temporomandibular joint dysfunction syndrome, Electromyography, Masticatory muscles.
Publisher: Biblioteca Digital da Unicamp
OAI identifier: oai:unicamp.br:30365
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://www.bibliotecadigital.u... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.