Dental Appliances for Sleep Apnoea

If you’ve been diagnosed with mild-to-moderate obstructive sleep apnoea and the words “you’ll need a CPAP machine” have given you pause, there’s a second-line option worth knowing about: the dental appliance, also called a mandibular advancement device or MAD. Jordan wrote this for the readers who want to understand the option before they commit.

What a dental sleep apnoea appliance does

The device is a custom-fitted oral appliance, worn at night, that holds your lower jaw slightly forward of its resting position. By advancing the mandible, it pulls the tongue and soft palate forward — opening the airway at the level where most obstructions occur during sleep.

It looks similar to two interlocked sports mouthguards. Modern versions are titratable — you (or your dentist) can adjust the amount of advancement in small increments to find the position that resolves the apnoea without causing jaw discomfort.

Who it works for

Mild to moderate obstructive sleep apnoea (AHI 5–30) — strong evidence base.
Severe OSA where the patient can’t tolerate CPAP — second-line option, often combined with positional therapy.
Heavy snorers without diagnosed apnoea — for partner-quality-of-life reasons. Worth confirming whether you actually have apnoea first via a sleep study.
Travellers who can’t carry a CPAP machine.

Who it doesn’t work for

Severe OSA (AHI > 30) as a sole treatment — CPAP remains the gold standard.
Patients with insufficient natural teeth to anchor the device (full denture wearers).
Significant TMJ dysfunction — the device increases load on the joint.
Active periodontal disease — need to stabilise first.
Patients with severe nasal obstruction — they need the nasal issue addressed first.

The fitting process

Confirmed sleep study diagnosis. Don’t make a clinical sleep-apnoea decision without one. GP referral usually needed.
Dental assessment — TMJ, bite, periodontal health, suitability of teeth.
Bite registration at the planned starting advancement (usually 60–70% of maximum protrusion).
Impressions or scan.
Fit appointment 2–3 weeks later.
Titration phase — gradually increase advancement over 2–8 weeks until symptoms resolve.
Follow-up sleep study to confirm the device is working.

What to expect in the first month

Increased saliva for the first few nights.
Mild jaw stiffness in the morning, easing within 30 minutes — improves over weeks as muscles adapt.
Tooth tenderness in the first hour after waking, easing.
Possibly some bite changes when you take the device out in the morning — your dentist will check for this and provide morning-bite repositioning exercises if needed.

Long-term considerations

Tooth movement can occur over years of nightly use. Annual dental review is essential.
TMJ load — minor in most patients, significant in some. Discontinue if pain develops.
Device lifespan — typically 3–5 years before replacement.
Annual sleep study review to confirm continued effectiveness.

Cost (Australia, 2026)

Custom-fitted titratable MAD: $1,800–$3,000 (most common range: $2,200–$2,500).
Health fund rebate: often $500–$1,000 under “occlusal splint” or “sleep appliance” item codes — check your policy.
Medicare: not covered for the device itself; the diagnostic sleep study is bulk-billable in many cases.

Cheap “boil and bite” devices are available online. Skip them — uncontrolled jaw position can cause TMJ damage and they don’t work for clinically significant apnoea.