An observational study in Sleep Bruxism, Adult, sponsored by Federal University of Pelotas. Completed at 1 site in Brazil. Open to participants aged 20 Years to 90 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-07-17.
Sponsored by Federal University of Pelotas · Observational
This cross-sectional study will evaluate the association between sociodemographic, occupational, clinical conditions, psychological (sense of coherence), sleep quality variables and SB diagnosed by PSG, the gold standard exam with audio-visual resources obtained at Pelotas Sleep Institute.
Sleep bruxism is defined as a masticatory muscle activity during sleep that is characterised as rhythmic (phasic) or non-rhythmic (tonic) and should be considered a risk factor rather than a disorder in otherwise healthy individuals.
The diagnosis of sleep bruxism often is challenging and despite the use of questionnaires, clinical exams and portable devices, based on current knowledge, the polysomnography with audio-video recordings emerges as the gold-standard criteria for a definite sleep bruxism diagnosis.
Included on the questionnaire there is a registration form, which contains: included: age at time of data collection , gender, marital status , and education level ; Occupational: individuals were asked about work outside home, and working hours; Clinical condition: body mass index, smoking; alcohol consumption; use of sleeping pills; respiratory allergy and Psychological: sense of coherence .
166 studies on the registry are indexed under Bruxism; 38 are open to participants now.
This study's enrollment of 240 is above the median of 90 across 59 observational studies indexed under Bruxism.
Browse Bruxism studies →Federal University of Pelotas is the lead sponsor of 52 studies on the registry; 4 are open to participants now.
Counted across the registry records on this site, refreshed daily.
All records obtained from adults (aged 20 to 60 years) and elderly (aged >60 years) who had undergone PSG at a private medical outpatients clinic from July 2017 to February 2018 were reviewed.
Exclusion Criteria:
The polysomnography (referred to as type I) allows assessing several sleep physiologic parameters (eg, EEG, electrooculogram, electromyogram, electrocardiogram, airflow, respiratory effort, oxygen saturation), whereas audio-video recording enables documenting tooth-grinding sounds and distinguishing between rhythmic masticatory muscle activity (RMMA) and orofacial (eg, swallowing) and other muscular activity (eg, head movements) during sleep. Based on the RMMA index (number of episodes per hour of sleep), sleep bruxism is diagnosed when RMMA episodes are greater than or equal to 2 (low-frequency SB, mild bruxism) or RMMA episodes are greater than or equal to 4 (high-frequency SB, severe bruxism)
Patients with Sleep Bruxism by Polysomnography exams
The data were obtained from polysomnography records in which masseter electromyography (EMG) burst was detected based on a predefined EMG threshold (20% of maximal voluntary tooth clenching task). Right masseter EMG bursts exceeding 0.25 second in duration were selected for oromotor activity scoring according to published criteria. Oromotor episodes separated by 3-second intervals were recognized as rhythmic masticatory muscle activity (RMMA) if they corresponded to 1 of the 3 following patterns: phasic (3 or more EMG bursts, each lasting 0.25 to 2 seconds), tonic (1 EMG burst lasting more than 2 seconds), or mixed (both burst types) episodes. EMG bursts were considered within the same RMMA episode if the interval between them was shorter than 2 seconds. Participants had SB diagnosed by polysomnography (PSG) if the RMMA index was greater than 2 episodes per hour of sleep.
Time frame: 4 months
Plan to share: Undecided
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This study is completed, as verified in Jul 2019. You cannot join it, but the record below documents what was studied.
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Federal University of Pelotas