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For sleep medicine

Bruxism, restless sleep, morning pain

The connection is better documented here than in most other specialties – and it runs in both directions, which makes it difficult to assign cause and effect. That is stated here too.

You know these patients

Sleep bruxism, unrefreshing sleep, morning headaches or jaw pain, suspected breathing-related disorders.

The connection

What has been measured

  1. 01Measured / described

    The figure

    Poor subjective sleep quality is associated with CMD – odds ratio of about 4.45, strongest in the muscle, arthralgia and arthrosis groups. Association, not causation.

  2. 02Measured / described

    The functional pathway is described

    The genioglossus muscle originates on the inner surface of the mandible and is the most important dilator of the upper airway; it works phasically with inspiration. The position of the lower jaw is therefore not a purely dental matter.

  3. 03Measured / described

    What myofunctional therapy measurably achieves

    In adult obstructive sleep apnoea, the AHI falls on average from 24.5 to 12.3 per hour; another meta-analysis finds a difference of −10.2 per hour. Daytime sleepiness (ESS −3.54) and sleep quality (PSQI −2.24) improve, although the AHI change there was not significant. No clear benefit is seen in children.

  4. 04Where the evidence ends

    Where the evidence ends

    Overall, the evidence for the chain sleep disorder → hyperalgesia → CMD is insufficient; sleep fragmentation as a mechanism is hypothesis. Bruxism itself is multifactorial, and wear patterns are not reliable markers of current bruxism activity – they indicate past parafunction, not ongoing.

Indication

When a referral is worthwhile

First, and without exception: red flags and unclear findings belong in specialist work-up, before any functional diagnostics. The CMD perspective complements, it does not replace.

Worthwhile

  • Sleep bruxism or morning jaw complaints
  • Unrefreshing sleep with jaw or masticatory muscle findings
  • Interdisciplinary coordination for airway-related questions

Not worthwhile

  • As a replacement for sleep medicine diagnostics or indicated positive airway pressure therapy
  • To assess tooth wear as a measure of ongoing bruxism activity

Your patient remains yours.

After the assessment or after regulation is complete, we always refer back to you. We only provide further treatment at your explicit written request.

Next steps

Three routes – your choice

  • 01

    I want to know more

    The full-text sources, our measurement protocols and the clinical explanatory model with its level of evidence disclosed.

    Request documents
  • 02

    I have a question about a case

    Call-back from the CMD specialist, not from reception.

    Ask a question
  • 03

    I would like to refer

    By phone, email or letter – whatever suits you. The findings report comes back to you.

    Referral

Other specialties

To the overview