Bruxism, restless sleep, morning pain
The connection here is more strongly documented 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 head or jaw pain, suspected sleep-related breathing disorders.
What has been measured
The figure
Poor subjective sleep quality is associated with CMD – odds ratio of around 4.45, strongest in the muscle, arthralgia and arthrosis groups. Association, not causality.
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 quantity.
What myofunctional therapy measurably achieves
In adult obstructive sleep apnoea, the AHI falls on average from 24.5 to 12.3 per hour; a further meta-analysis finds a difference of −10.2 per hour. Daytime sleepiness (ESS −3.54) and sleep quality (PSQI −2.24) improve, although the change in AHI was not significant there. In children there is no clear benefit.
Where the evidence ends
The evidence for the chain sleep disorder → hyperalgesia → CMD is insufficient overall; sleep fragmentation as the mechanism is a hypothesis. Bruxism itself is multifactorial, and wear patterns are not reliable markers of current bruxism activity – they indicate past parafunction, not ongoing parafunction.
When a referral is useful
First and without exception: red flags and unclear findings belong in a specialist work-up, before any functional diagnostics. The CMD perspective is complementary, not a substitute.
Useful
- sleep bruxism or morning jaw complaints
- unrefreshing sleep with jaw or masticatory muscle findings
- interdisciplinary coordination for airway-related questions
Not useful
- as a substitute for sleep medicine diagnostics or indicated positive airway pressure therapy
- for assessing wear as a measure of ongoing bruxism activity
Your patient remains yours. After the assessment, or after the regulation is complete, we always refer back to you. We take on any treatment beyond this exclusively at your express, written request.
Three routes – you choose
I want to know more
The sources in full text, our measurement protocols and the clinical explanatory model with the level of evidence disclosed.
I have a question about a case
A call back from the CMD specialist, not from reception.
I would like to refer
By phone, e-mail or letter – whichever suits you. The findings report comes back to you.