Properties of tonic episodes of masseter muscle activity during waking hours and sleep in subjects with and without history of orofacial pain

Acing Habibie Mude, Shigehisa Kawakami, Seiya Kato, Shogo Minagi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Purpose: To provide a scientific data related to the tonic activity of masseter muscle in subjects with and without history of orofacial pain during their normal daily life. Methods: Thirty-three subjects were divided into two groups, a pain history group (PHG) and a non-pain history group (non-PHG), based on their responses to the Research Diagnostic Criteria for Temporomandibular Disorders questionnaire. After excluding four subjects with incomplete recordings, full-day masseter muscle surface EMGs of 29 subjects (10 men, 19 women; mean age 24.1 years) were analyzed. Tonic episode (TE) was defined as continuous EMG activity with a duration at least 2 s with intensities above twice the baseline noise level. TEs were classified into 6 strength categories (<7.5%, 7.5–10%, 10–15%, 15–25%, 25–40% and >40% of the maximum voluntary clenching (MVC)). The mean duration of activity observed in the non-PHG + 2 SD was adopted as a cutoff for identifying sustained TE. Results: During waking hours, the incidence of sustained TEs was significantly higher in the PHG than in the non-PHG (p < 0.05). The incidence and total duration of sustained TEs were significantly higher in the PHG than in the non-PHG at intensities of 7.5–10% MVC, 10–15% MVC, and 15–25% MVC (p < 0.05). No significant difference was observed during sleep. Conclusions: Within the limitations of this study, it would be concluded that sustained TEs may have a correlation with orofacial pain and the intensity range of 7.5–25% MVC would be an important range for future clenching studies

Original languageEnglish
Pages (from-to)234-238
Number of pages5
JournalJournal of Prosthodontic Research
Volume62
Issue number2
DOIs
Publication statusPublished - Apr 2018

Keywords

  • Clenching
  • Electromyography
  • Masseter muscle
  • Orofacial pain
  • Temporomandibular disorders

ASJC Scopus subject areas

  • Oral Surgery
  • Dentistry (miscellaneous)

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