Variability of sleep bruxism—findings from consecutive nights of monitoring

Brigitte Ohlmann1, Wolfgang Bömicke1, Rouven Behnisch2, Peter Rammelsberg2,1, Marc Schmitter2,3
1Department of Prosthodontics, University of Heidelberg, Heidelberg, Germany
2Institute of Medical Biometry and Informatics (IMBI), University of Heidelberg, Heidelberg, Germany
3Department of Prosthodontics, University of Würzburg, Würzburg, Germany

Tóm tắt

To determine sleep bruxism (SB) behavior during five consecutive nights and to identify correlations between SB episodes per hour (SB index) and sleep-time masseter-muscle activity (sMMA). Thirty-one participants were included in the study. Of these, 10 were classified as sleep bruxers (group SB-1) and nine as non-sleep bruxers (group non-SB). The bruxism status of these 19 patients was identified by means of questionnaires, an assessment of clinical symptoms, and electromyographic/electrocardiographic data (Bruxoff® device). The remaining 12 participants were also identified as bruxers, but based exclusively on data from the Bruxoff device (group SB-2). Data analysis included descriptive statistics and Spearman’s correlation to assess the relationship between the SB index and sMMA. Participants in group SB-1 showed an overall mean SB index of 3.1 ± 1.6 and a mean total sMMA per night of 62.9 ± 38.3. Participants in group SB-2 had an overall mean SB index of 2.7 ± 1.5 and a mean total sMMA of 56.0 ± 29.3. In the non-SB group, participants showed an overall mean SB index of 0.8 ± 0.5 and a mean total sMMA of 56.8 ± 30.3. Spearman’s correlation yielded values of − 0.27 to 0.71 for the correlation between sMMA and SB index. The data revealed variable SB activity and the absence of a reliable correlation between sMMA and the SB index. The high variation in SB activity and lack of correlation between sMMA and the SB index should be considered when diagnosing SB. Clinical Trials [NIH], clinical trial no. NCT03039985.

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