Short answer: In obstructive sleep apnea, the throat muscles relax so much during sleep that the airway repeatedly narrows or closes completely — with brief pauses in breathing that interrupt sleep over and over, often without the person waking enough to notice. The diagnosis is made by a sleep physician, not a dentist. What dentistry can contribute: for mild to moderate apnea, a custom-made mandibular advancement splint as a treatment option, medically prescribed and monitored by sleep medicine.
We cover this topic because it sits at the intersection of sleep medicine and dentistry — and because many patients first come to us about snoring, not about sleep apnea. The distinction matters, so we set it out clearly here.
What happens in sleep apnea
In obstructive sleep apnea (OSA), the throat muscles relax during sleep to the point that the upper airway partially or fully collapses. Breathing stops for at least ten seconds — sometimes multiple times an hour, in severe cases more than 30 times. Each episode ends with a brief, usually unconscious arousal so breathing restarts. Deep sleep is fragmented as a result, without the person remembering waking up in the morning.
Severity is measured by the apnea-hypopnea index (AHI) — the number of breathing pauses per hour of sleep: mild at 5 to 15, moderate at 15 to 30, severe above 30. Only a sleep lab or an at-home polygraphy test can provide this number, not a questionnaire or an app.
Warning signs that justify getting checked
- Loud, irregular snoring with observed breathing pauses — usually noticed by a partner
- Marked daytime tiredness despite adequate sleep time, dozing off during monotonous tasks
- Morning headache or a dry mouth on waking
- Waking at night gasping or feeling like you are choking
- Difficulty concentrating, irritability, frequent night-time urination
- High blood pressure that responds poorly to medication — a common indirect clue
Left untreated, obstructive sleep apnea is linked to a higher risk of high blood pressure, heart rhythm disorders, stroke and accidents from falling asleep at the wheel. That makes getting checked urgent, not optional.
How diagnosis works — and where it does not belong
A sleep physician or pulmonologist makes the diagnosis, usually in two steps: first an at-home polygraphy device for one night, and if the result is unclear, a full polysomnography night in a sleep lab. We do not make this diagnosis as dentists — what we do is refer to sleep medicine when there is reasonable suspicion, and assess the dental treatment option once a diagnosis has already been made.
Treatment options at a glance
CPAP therapy
A positive-pressure mask keeps the airway open pneumatically — the gold standard, especially for moderate to severe apnea. Effective, but not tolerated long-term by every patient.
Mandibular advancement splint
For mild to moderate apnea, a recognised alternative or adjunct, custom-made by a dentist. More detail in our guide to the snoring splint.
Weight & sleep position
Weight loss noticeably improves the AHI for many overweight patients. Sleeping on the back often worsens the narrowing further — positional therapy encouraging side-sleeping can help with position-dependent apnea.
ENT or maxillofacial surgical procedures
For anatomical narrowing — such as significantly enlarged tonsils or a pronounced retruded lower jaw — surgical procedures may be considered in selected cases, in close coordination between ENT and maxillofacial surgery.
What we specifically contribute as dentists
For medically diagnosed mild to moderate apnea, we make a custom advancement splint on prescription, adjust the advancement step by step, and check teeth, jaw joint and bite regularly. Where apnea is reasonably suspected — for example a patient who comes to us about snoring and also reports warning signs — we actively refer to sleep medicine rather than making a splint without prior diagnosis.
IMPORTANT
This text does not replace a medical diagnosis. If sleep apnea is suspected — especially with observed breathing pauses or strong daytime tiredness — the first step is a sleep medicine assessment, not a self-test and not an over-the-counter splint.
Frequently asked questions
Can a dentist diagnose sleep apnea?
No. The diagnosis is made by a sleep physician or pulmonologist using polygraphy or polysomnography. If we have reasonable suspicion we can flag it and refer, and once a diagnosis has been made we can offer a dental treatment option.
Is all snoring a sign of sleep apnea?
No. Most snorers do not have sleep apnea. What matters is whether breathing repeatedly stops — that cannot be reliably told apart by listening alone, only by a sleep medicine measurement.
Is a splint enough instead of a breathing mask?
For mild to moderate apnea, a splint can be a suitable alternative, especially if CPAP is not tolerated. For severe apnea, CPAP is usually the more effective option. The decision is made by the sleep physician together with you.
Does insurance cover the cost?
For medically diagnosed mild to moderate obstructive sleep apnea, German statutory insurance may cover the cost of an advancement splint after prescription and approval. For plain snoring without an apnea diagnosis it is a private fee.