Sleep Apnea Mouth Guard vs. CPAP: How to Choose the Right Treatment for You

Getting a sleep apnea diagnosis is an amazing step on your sleep health journey. You finally discovered the reason you wake up so exhausted, and it’s an established condition with multiple treatment options, such as CPAP or a mouth guard. When comparing a sleep apnea mouth guard vs CPAP therapy, which comes out the winner? 

Turns out, both can be great options. They simply suit different patient profiles. “The goal isn't to prove that CPAP is better than an oral appliance, or vice versa,” says Meghan Dassani, DMD, a dentist who specializes in sleep health, “The goal is to find an effective treatment that this particular patient can and will use consistently.”

Continue reading to learn the advantages and drawbacks of both treatments, personal indicators that one or the other may work for you, and how to discuss treatment options with a sleep specialist. 

Which treatment is right for your severity level?

Continuous positive airway pressure (CPAP) is typically referred to as the gold standard for treating sleep apnea, especially moderate to severe cases. Meanwhile, mouth guards for sleep apnea are often viewed as an alternative for mild cases or an add-on treatment for moderate to severe cases. 

A 2022 meta-review in Cureus reinforced that when used properly, a CPAP machine leads to a greater improvement in oxygen levels and apnea-hypopnea index (a measure of breathing interruptions) than oral devices like a mouth guard, though it found no significant difference between the two in reducing daytime sleepiness. A 2026 review in Frontiers in Neurology similarly found prescription mouth guards to be as effective as CPAP therapy in reducing daytime sleepiness.

The 2026 review also confirmed that CPAP outperformed mouth guards on oxygen levels and breathing interruptions, but found that mouth guards showed a modest edge over CPAP on daytime blood pressure reduction, and a meaningful edge in nightly adherence, meaning people wore them for longer stretches each night..

Together, these papers signal that the right choice may depend on the disease severity and what a patient can comfortably stick with. A clinician can help determine appropriate options for you.

*Note: Individual approaches depend on clinical evaluation. 

How each treatment works

When I think of a mouth guard, the image of a hockey player pops up. Dr. Dassani clarifies that sleep apnea mouth guards are a bit different than over-the-counter options or those used for contact sports. 

Instead, the term “sleep apnea mouth guard” refers to a prescription oral appliance therapy device that’s molded from impressions of your teeth.

These devices and CPAP therapy work a little differently:

• How sleep apnea mouth guards work: They stabilize the jaw. “By bringing the jaw forward, we can help maintain a more open upper airway and reduce its tendency to collapse while the patient sleeps,” Dr. Dassani explains.

• How a CPAP machine works: It delivers continuous airway pressure via a mask hooked up to a CPAP machine. The pressure “acts essentially as a pneumatic splint to help prevent the airway from collapsing during sleep,” says Dr. Dassani.

Oral appliance therapy, which includes mouth guards, also includes these specific types of sleep apnea treatment: 

• Mandibular advancement device (MAD): Stabilizes the position of the jaw when sleeping. A sleep apnea mouth guard is a type of MAD. 

• Tongue stabilizing device (TSD): Prevents tongue from falling back into the airway when someone sleeps.

Reading about the various treatment options can be overwhelming, but it’s also good news: Sleep apnea has many effective treatments. Finding the right one is just a matter of experimentation and time.

Mouth guard vs. CPAP: side-by-side comparison

When comparing mouth guard vs CPAP for sleep apnea, Dr. Dassani actually pushes back on promoting one as universally better. Instead the two treatments are appropriate under different circumstances.

CPAP therapy

• Typical use: Often a first-line treatment for moderate-to-severe sleep apnea. Some researchers even refer to it as the “gold standard” of sleep apnea treatment.

• Effectiveness: In a study detailed in the Journal of Clinical Medicine, the majority of patients saw an improvement in daytime alertness and oxygen saturation levels due to CPAP therapy. 

• Comfort: Patients report symptoms such as dry mouth, nasal congestion, and air leakage, per the Journal of Dental Research. Some people and/or their partners also find it hard to go to sleep with the noise of the CPAP machine. 

• Cost/Insurance: We’ll cover this more below, but CPAP therapy is often more expensive and has ongoing costs. Insurance often covers some of the price when CPAP therapy is deemed medically necessary.

• Portability: CPAP machines can be bulky and hard to travel with. 

• Compliance: Some studies estimate 50% of people are good users, defined as using the device four or more hours a night consistently. Biological females, people who have mild sleep apnea, people who are younger, or those who have fewer symptoms are less likely to continue with treatment, per a review in Internal and Emergency Medicine.

Prescription mouth guard

• Typical use: For mild cases or when CPAP therapy doesn’t work. 

• Effectiveness: While significant evidence suggests that CPAP therapy may be more effective at treating obstructive sleep apnea, prescription mouth guards may be easier for patients to adhere to and may improve overall quality of life, per a 2024 review in Cureus.

• Comfort: Generally considered more comfortable, though patients still report side effects like teeth discomfort and jaw pain, per the Journal of Dental Research.

• Cost/Insurance: Prescription mouth guards are typically more affordable and have fewer ongoing costs. Insurance may cover the price when deemed medically necessary.

• Portability: A mouth guard is easier to take with you, making it a solid option for people who travel.

• Compliance: In a 2025 article in the European Journal of Orthodontics, about 67.3% of people wore their oral appliance night after night after six months of use. This was a drop compared to the amount who wore it right after getting the device, though the researchers noted adherence at the 12 month mark was similar to the six month mark.

*Note: OTC mouth guards are not equal to custom-fitted prescription devices. This table compares the latter to CPAP therapy.

Adherence and comfort: the real-world tradeoff

To experience improvement, both CPAP and oral appliances need to be used consistently. However, neither has a perfect 100% compliance rate. A 2025 study in Sleep and Breathing found 33.5% of patients discontinued CPAP within a three year span, with higher rates for patients under 45 or over 65. 

Additionally, a 2022 review in Internal and Emergency Medicine about 50% of users consistently use their CPAP machine for four or more hours year after year. The review’s authors note that compliance tends to be higher in the first year using CPAP therapy and for those with moderate or severe sleep apnea.

Meanwhile, 80% of patients were classified as “adherent” to an oral appliance one month after starting, per research in the European Journal of Orthodontics. That fell to 67.3% at the six month mark, though adherence was similar at six and twelve months. People who did wear their mouth guard wore it for 5.98 hours a night on average.

In these studies, the majority of those who discontinued either did so because they did not experience the expected benefits or due to side effects. 

Research published in the Journal of Dental Research recorded the most common side effects for CPAP therapy and oral appliance devices:

CPAP therapy side effects:

• 50.8% experienced dry mouth

• 23% reported nasal congestion

• 29.5% experienced air leakage

Prescription mouth guard side effects:

• 14.8% experienced jaw pain

• 8.2% reported teeth discomfort

These percentages suggest more people experience side effects from CPAP therapy, though both options may cause side effects. 

Cost and insurance: what to expect for each treatment

The American Academy of Sleep Medicine reports that it costs about $2,105 per person to treat sleep apnea per year. This includes surgery costs. For patients who don’t require surgery, the average cost drops to $1,190 annually. The report notes that CPAP machines often have higher costs than a sleep apnea mouth guard, though exact figures are not provided.

That’s because neither treatment has one set price that applies in all scenarios. What you pay depends on your insurance provider, the cost for a consultation with a sleep specialist, and more. For a mouth guard, you may have to pay for the dental consultation, teeth impressions, and the guard itself could run from $100 to over $4,000.

CPAP therapy has more costs, some of which are ongoing:

• CPAP masks (one-time at setup)

• Machine (either rented or one-time at setup)

• Tubing (ongoing) 

• Air filters (ongoing) 

• Water chambers (ongoing) 

• Any accessories to make it more comfortable (one-time or ongoing, depending on the accessory)

Some insurance providers may have more stipulations around when they’ll cover CPAP therapy. Medicare, for example, will only cover the costs of renting the equipment for 13 months. If someone uses the machine consistently during that time, then Medicare may cover the cost to purchase a CPAP machine. 

To understand the total cost, check with your insurance provider before purchasing either. Alternatively, work with a sleep clinic like Dreem Health, which verifies coverage upfront and handles prior authorization paperwork.

When you've already tried CPAP and stopped

If you’ve tried (and stopped) CPAP therapy, you’re not out of options; an oral appliance device like a mouthguard may help. Dr. Dassani reports that some of her patients have to try multiple treatment approaches before finding the one that works. 

“If CPAP isn't working for you, that shouldn't automatically mean, ‘I can't treat my sleep apnea,’” explains Dr. Dassani, “It should mean, ‘Let's have another conversation about my options.’"

That conversation should take place with a sleep specialist. A primary care provider can refer you to a sleep medicine specialist in your local area. Alternatively, you could use a telehealth consultation platform, such as Dreem Health. An online consultation offers access to sleep specialists without the long wait time or a commute to their office.

Can you use both? When combination therapy makes sense

For many years, CPAP therapy and mouth guards were viewed as an either/or situation, but the two can be effective together, especially in cases of severe sleep apnea. A 2020 research article in the Journal of Applied Physiology found that combining the two helped in cases where someone could not tolerate a high CPAP level or for patients who had incomplete responses to CPAP therapy alone. 

It’s also possible to switch back and forth. “CPAP can be extraordinarily effective. Oral appliance therapy can also be an excellent treatment for appropriately selected patients,” says Dr. Dassani, “And for some people, treatment may involve more than one strategy over the course of their lives.”

Questions to ask your provider before choosing

Choosing a sleep apnea treatment isn’t a decision you have to make on your own. A sleep specialist can help. To get the most out of a sleep health consultation, here are some questions to ask:

• Based on my sleep apnea severity, what is the best treatment approach?

• Do you have any advice on how to consistently use CPAP therapy or a MAD? Which one do you think I might be better able to continuously use?

• Are there any concerns about fit or comfort I should know about between the two options?

• What are the costs of CPAP therapy vs mouth guard? Which is my insurance more likely to cover?

• What type of lifestyle better suits a mouth guard or CPAP therapy?

The bottom line

Neither CPAP therapy or a mouth guard are “better” in all cases. In fact, sometimes the two are prescribed together. The appropriate treatment depends on various factors, such as sleep apnea severity, if someone can consistently use a CPAP machine, and what their insurance may cover. A sleep specialist, such as the team at Dreem Health, can help you navigate different treatment options and choose a suitable approach for your case.

Frequently asked questions (FAQs) 

Can a mouth guard replace CPAP for sleep apnea?

A mouth guard isn’t a replacement for CPAP therapy. The two are both viable, effective treatment options that work for different patients. That said, if someone has trouble consistently using their CPAP machine, they may want to consider a mouth guard.

Are sleep apnea mouth guards covered by insurance?

When medically necessary, sleep apnea mouth guards are often covered by insurance. Refer to your specific policy to see if this is the case. 

How do I know which sleep apnea treatment is right for me?

Answering the oral appliance vs CPAP debate on your own is tricky. Instead, consult a sleep specialist who can talk you through the pros and cons of both and help determine which is appropriate for your situation.