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Related Experiment Videos

Variability in sleep bruxism activity over time.

G J Lavigne1, F Guitard, P H Rompré

  • 1Centre d'étude du sommeil et des rythmes biologiques, Hôpital du Sacré-Coeur de Montréal, Canada. gilles.lavigne@umontreal.ca

Journal of Sleep Research
|November 7, 2001
PubMed
Summary

Sleep bruxism (SB) diagnosis remains stable over time in moderate to severe patients. However, the night-to-night variability in sleep bruxism episodes and grinding noise can be significant for some individuals.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Oral Health

Background:

  • Sleep bruxism (SB) is characterized by jaw movements and tooth grinding during sleep.
  • SB exhibits significant night-to-night variability, impacting clinical trial assessments.
  • Understanding individual SB variability is crucial for evaluating management strategies.

Purpose of the Study:

  • To analyze the night-to-night variability of sleep bruxism over time in patients with moderate to severe SB.
  • To assess the consistency of SB diagnostic criteria over extended periods.
  • To identify factors contributing to SB variability.

Main Methods:

  • Nine patients with moderate to severe SB were monitored over multiple nights (2-8 nights per subject).
  • Recordings spanned intervals from 2 months to 7.5 years.

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  • Key outcomes included SB episodes per hour, SB bursts per hour, and SB episodes with grinding noise, analyzed using standard deviation and coefficient of variation.

    • Main Results:

    • The mean coefficient of variation for SB outcomes ranged from 25.3% (episodes per hour) to 53.5% (episodes with noise).
    • Linear regression indicated that sleep stages 1 and 2 significantly influenced the variability of SB episodes per hour.
    • SB diagnosis remained consistent over time for most subjects, with 35 out of 37 nights meeting diagnostic criteria.

    Conclusions:

    • While the diagnosis of sleep bruxism is generally stable in moderate to severe cases, significant individual night-to-night variability exists.
    • This variability may influence the interpretation of SB management strategies in clinical trials.
    • Further research into the factors driving SB variability is warranted.