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Influence of nocturnal bruxism on the stomatognathic system. Part I: a new device for measuring mandibular movements during sleep
Author(s) -
Amemori Y.,
Yamashita S.,
Ai M.,
Shinoda H.,
Sato M.,
Takahashi J.
Publication year - 2001
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.2001.00757.x
Subject(s) - stomatognathic system , sleep bruxism , electromyography , polysomnography , medicine , nocturnal , electroencephalography , orthodontics , audiology , dentistry , physical medicine and rehabilitation , psychiatry
The purpose of this study was to investigate the influence of bruxism on the stomatognathic system. A new device for measuring nocturnal mandibular movements was developed using a PIN photodiode sensor, integrated with polysomnography including electromyography (EMG), electroencephalography (EEG) and electro oculography (EOG). One bruxing event was defined depending upon EMG activities above 5% maximum voluntary contraction (MVC), and mandibular movement for each event was classified into three patterns (clenching, grinding and mix). Three subjects were selected for this study. Two of these reported a bruxing habit and one subject had some symptoms of temporomandibular dysfunction (TMD). Mandibular movement was analysed for these subjects. Frequency and duration of the bruxism events were 4·5–10·9 and 47·8–174·9 s h –1 respectively. Clenching type bruxism was most frequently observed for all three subjects and EMG activities during clenching were stronger than grinding.