title: Bruxism and sleep efficiency measured at home with wireless devices.
abstract: The present study comprised 101 (48 men) employees of the Finnish Broadcasting Company with or without irregular shift work, but all with a work week of five shifts in a row followed by 2 days off. The mean age of the subjects was 41.0 years (SD = 9.9). The BiteStrip, a single-use disposable EMG device was used for one night during the work week to detect sleep bruxism. The Actiwatch Plus actigraph was worn on the non-dominant wrist for the entire week to evaluate sleep. Total sleep time and fragmentation index, the latter as a measure of sleep efficiency was calculated for the present study. The BiteStrip scores among the participants were: 0- no bruxism: 52.2% (according to the manufacturer, comparable to a sleep laboratory bruxism count of up to 39 over 5 h), 1- mild: 29.3% (40-74 counts), 2- moderate: 12.0%: (75-124 counts) and 3- severe: 6.5% (>125 counts). Severe bruxers slept less during the work week than non-bruxers (P = 0.009), but severe bruxers slept slightly more than non-bruxers during days off. The group means of the sleep fragmentation index decreased from start towards the middle of the work week and increased during days off (P = 0.016). The levels of the fragmentation indices were consistently higher in accordance with bruxism severity (P = 0.013). It was concluded that bruxism has a coherent relationship with sleep efficiency and it can be detected at home with a low cost device.
authors.affiliation: Department of Stomatognathic Physiology & Prosthetic Dentistry, Institute of Dentistry, University of Helsinki, Helsinki, Finland. jari.ahlberg@helsinki.fi
authors.forename: K
authors.initials: K
authors.lastname: Ahlberg
authors.forename: A
authors.initials: A
authors.lastname: Savolainen
authors.forename: S
authors.initials: S
authors.lastname: Paju
authors.forename: C
authors.initials: C
authors.lastname: Hublin
authors.forename: M
authors.initials: M
authors.lastname: Partinen
authors.forename: M
authors.initials: M
authors.lastname: Könönen
authors.forename: J
authors.initials: J
authors.lastname: Ahlberg
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002012:Bruxism / Q000175:diagnosis / Q000209:etiology; D016022:Case-Control Studies; D004576:Electromyography / Q000295:instrumentation* / Q000379:methods; D005260:Female; D018575:Home Care Services, Hospital-Based; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000503:physiopathology*; D017286:Polysomnography; D015203:Reproducibility of Results; D012890:Sleep / Q000502:physiology; D020186:Sleep Bruxism / Q000175:diagnosis* / Q000209:etiology; D012892:Sleep Deprivation / Q000150:complications* / Q000523:psychology; D011795:Surveys and Questionnaires; D014940:Work Schedule Tolerance / Q000502:physiology* / Q000523:psychology