Relationships among nocturnal jaw muscle activities, decreased esophageal pH, and sleep positions

Shouichi Miyawaki, Yuko Tanimoto, Yoshiko Araki, Akira Katayama, Mikako Imai, Teruko Takano-Yamamoto

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

The purpose of this study was to examine the relationships among nocturnal jaw muscle activities, decreased esophageal pH, and sleep positions. Twelve adult volunteers, including 4 bruxism patients, participated in this study. Portable pH monitoring, electromyography of the temporal muscle, and audio-video recordings were conducted during the night in the subjects' homes. Rhythmic masticatory muscle activity (RMMA) episodes were observed most frequently, with single short-burst episodes the second most frequent. The frequencies of RMMA, single short-burst, and clenching episodes were significantly higher during decreased esophageal pH episodes than those during other times. Both the electromyography and the decreased esophageal pH episodes were most frequently observed in the supine position. These results suggest that most jaw muscle activities, ie, RMMA, single short-burst, and clenching episodes, occur in relation to gastroesophageal reflux mainly in the supine position.

Original languageEnglish
Pages (from-to)615-619
Number of pages5
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume126
Issue number5
DOIs
Publication statusPublished - 2004 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Orthodontics

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