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Electromyographic Evaluation of Neuromuscular Coordination of Subject After Orthodontic Intervention

2009; Taylor & Francis; Volume: 27; Issue: 3 Linguagem: Inglês

10.1179/crn.2009.023

2151-0903

André Luís Botelho, Melissa de Oliveira Melchior, Ana Maria Bettoni Rodrigues da Silva, Marco Antônio Moreira Rodrigues da Silva,

Botulinum Toxin and Related Neurological Disorders

The aim of this work was to investigate the neuromuscular changes associated with the orthodontic post-treatment using surface electromyography. One hundred (100) young, healthy adults without signs and symptoms of temporomandibular dysfunction (TMD) were divided into two groups: 60 subjects who were undergoing orthodontic intervention (Ortho Group) and 40 subjects who had no orthodontic intervention (Control Group), aged 18-25 years. EMG activity of masseter and temporalis anterior muscle was recorded during two different tests: 1. maximum voluntary clench (MVC) with cotton rolls; and 2. MVC in intercuspal position. In all subjects, both tests were performed with symmetric muscular patterns (more than 85%) and with insignificant latero-deviating of the mandible (lower than 10%). There are no statistically significant differences between the subjects of both groups evaluated. Both groups showed medium index values calculated according to the normal standards established previously.