What an oral appliance is
An oral appliance is a custom mouthpiece worn during sleep. The most common type — a mandibular advancement device (MAD) — gently holds the lower jaw forward, which mechanically widens the airway behind the tongue. A separate type — the tongue retaining device — works on the tongue rather than the jaw.
Who is a good candidate
- Mild to moderate obstructive sleep apnea (AHI 5–30)
- Habitual snoring without significant apnea
- Patients who have tried CPAP and find it intolerable
- Frequent travelers who need a portable option
- Adequate dentition to hold the appliance (a key dental requirement)
- No active temporomandibular joint (TMJ) disorder
Who is not
- Severe sleep apnea (AHI ≥ 30) — CPAP is preferred first
- Significant tooth loss without restorative work
- Severe gum disease, untreated dental caries, or active TMJ pain
- Children — appliances are not used as a first-line in pediatric care
How the fitting works
Sleep medicine evaluation
We confirm the diagnosis, severity, and suitability for oral appliance therapy. A baseline polysomnogram is required before fitting.
Dental consultation
Our partner dental specialist evaluates dentition, periodontal status, and TMJ. Impressions or digital scans are taken.
Fabrication and delivery
The custom appliance is fabricated to your bite. At delivery, we set the initial advancement position conservatively.
Titration period
Over weeks, we gradually advance the device based on symptom response and partner feedback, balancing efficacy against jaw comfort.
Confirmatory study
A follow-up polysomnogram while wearing the appliance verifies that residual events are within target.
What to expect in the first month
- Mild jaw soreness — usually subsides within one to two weeks
- Increased salivation, particularly the first few nights
- Some patients notice mild bite changes that resolve within 30 minutes of waking
- Snoring volume typically drops within the first week, often before titration is complete
Long-term care
Oral appliances last several years with proper care. Daily cleaning, periodic dental review for fit and bite stability, and annual sleep medicine follow-up are required. A small subset of long-term users develop bite changes that warrant orthodontic review.
Combination therapy
For some patients, combining an oral appliance with positional therapy or weight management produces better outcomes than either alone. We design the combination based on the polysomnogram and lifestyle pattern.
For the right candidate, an oral appliance is a quiet, portable, and effective alternative to CPAP. The wrong candidate will not benefit — and that is why the workup matters. — Seoul Sleep Center clinical principle