CPAP vs Oral Appliance Therapy: Which Treatment Is Right For You?

Side-by-Side Comparison

What Is CPAP?

Continuous Positive Airway Pressure (CPAP) is a therapy that delivers a constant stream of pressurized air through a mask worn during sleep. This air pressure acts as a splint, keeping the airway open and preventing apnea events. CPAP is highly effective when used consistently — but the mask, tubing, noise, and pressure can make adherence challenging for many patients.

What Is Oral Appliance Therapy?

Oral appliance therapy (OAT) uses a custom-fitted dental device worn only during sleep. The device repositions the lower jaw slightly forward, which tightens the soft tissues of the throat and prevents the airway from collapsing. At Houston Sleep Associates, Dr. Holly Boone custom-fabricates each appliance for precise fit and optimal effectiveness.

Oral appliances require no mask, no electricity, and produce no noise. They fit in a small case for easy travel. Many patients who previously struggled with CPAP report high satisfaction and consistent nightly use with an oral appliance.

Effectiveness Comparison

Multiple clinical studies and meta-analyses have found that oral appliance therapy achieves comparable outcomes to CPAP for mild to moderate sleep apnea when real-world compliance is factored in. While CPAP can achieve greater AHI reduction in lab settings, the advantage disappears when patients use CPAP only 4–5 hours per night versus oral appliances worn all night.

For severe sleep apnea, CPAP remains the first-line recommendation, but patients who cannot tolerate CPAP often benefit significantly from oral appliance therapy as a clinically validated alternative.

Compliance Comparison

Studies consistently show that oral appliance therapy achieves 75–90% nightly compliance compared to 40–60% for CPAP. Because untreated or under-treated sleep apnea carries significant health risks, higher compliance translates directly into better patient outcomes. This compliance advantage is a primary reason that oral appliance therapy is recommended by the American Academy of Sleep Medicine for CPAP-intolerant patients.

Comfort Comparison

CPAP masks can cause skin irritation, pressure marks, claustrophobia, and discomfort from dry air. Many patients struggle with mask leaks and the sensation of pressurized air. Custom oral appliances, by contrast, are precision-fitted to the patient's teeth — similar to a mouthguard — and most patients adapt quickly with minimal discomfort.

Travel Comparison

A CPAP machine requires a power source, distilled water for the humidifier, and a significant amount of carry-on space. Oral appliances fit in a compact case, require no power, and are easily packed with any luggage. For frequent travelers, this practical advantage is often a deciding factor.

Cost Considerations

CPAP therapy involves ongoing costs for mask replacements, filters, humidifier water, and equipment maintenance. Oral appliances involve a one-time custom fabrication cost — typically covered substantially by medical insurance and Medicare for diagnosed sleep apnea. Houston Sleep Associates works with most major insurance plans to maximize patient benefits.

Who Is a Candidate?

Oral appliance therapy is appropriate for patients with mild to moderate obstructive sleep apnea, patients who cannot tolerate CPAP, patients who travel frequently, patients who prefer a maskless treatment option, and patients seeking a quieter, more comfortable alternative to CPAP.

Dr. Holly Boone at Houston Sleep Associates evaluates each patient's sleep study results, dental and airway anatomy, and lifestyle preferences to determine whether oral appliance therapy is the right fit.

Frequently Asked Questions