What Is a Sleep Apnea Mouth Guard?
When people search for a sleep apnea mouth guard, they usually mean an oral appliance. It looks a bit like a sports mouth guard, but it does a different job. It is worn only during sleep and is designed to keep the airway from closing.[7]
Obstructive sleep apnea (OSA) happens when the tissues in the throat relax and block the airway again and again during sleep. Over time, untreated OSA is linked to daytime sleepiness, high blood pressure, and other health problems.[2] You can read more in our guide to obstructive sleep apnea.
A sleep apnea oral appliance is different from a night guard. A night guard covers your teeth to protect them from grinding. It does not treat sleep apnea. If you grind your teeth, see our page on the dental night guard.
One point matters before anything else. A dentist cannot diagnose sleep apnea. A physician diagnoses it with a sleep study, either in a sleep lab or with a home test. The dentist then makes and adjusts the device on the physician's prescription.[1]
How Oral Appliances Work
The National Heart, Lung, and Blood Institute describes two main types of oral device for sleep apnea.[7]
- Mandibular advancement devices (MADs). These fit over the upper and lower teeth and hold the lower jaw slightly forward. Moving the jaw forward also pulls the tongue and nearby tissue forward, which widens the space behind them.[2][7]
- Tongue-retaining devices. These hold the tongue in a forward position so it cannot fall back and block the airway. They are less common than MADs.[7]
One-piece and two-piece designs
Some MADs are a single piece with a fixed jaw position. Others are two pieces that let the dentist, or sometimes the patient, move the jaw forward in small steps. A 2023 review by dental sleep medicine researchers notes that two-piece designs allow gradual adjustment, which may improve comfort and adherence.[2]
No one brand or design has been proven better than the others for everyone. The review says little evidence exists that separates individual designs, so the fit and the follow-up matter as much as the model.[2]
Custom vs. Boil-and-Bite Devices
Boil-and-bite devices are sold online and in stores. You soften the plastic in hot water and bite into it to shape it. They cost less and are easy to get, but they are a different product from a custom device.[2]
The 2015 guideline from the American Academy of Sleep Medicine (AASM) and the American Academy of Dental Sleep Medicine (AADSM) suggests that a qualified dentist use a custom, adjustable appliance rather than a non-custom device.[1] The 2023 review reports that custom devices were more effective in a meta-analysis and were better tolerated and preferred by patients.[2]
Medicare draws the same line. Its coverage policy pays for a custom-made mandibular advancement device provided by a licensed dentist. It does not cover prefabricated devices, citing too little evidence that they work.[6]
An over-the-counter product that makes snoring quieter can also hide a problem. If you snore, you may have sleep apnea and need a test. For more on this, see our guide to custom vs. over-the-counter snoring mouthpieces.
Who Is a Candidate for a Sleep Apnea Mouth Guard?
The AASM and AADSM guideline suggests that sleep physicians consider an oral appliance for adults with OSA who cannot tolerate CPAP or who prefer another treatment.[1] CPAP is a machine that blows air through a mask to keep the airway open. The American Academy of Sleep Medicine's own review finds that CPAP lowers disease severity, sleepiness, and blood pressure compared with no treatment.[5]
A 2023 meta-analysis found that oral appliances may work better for people with mild to moderate OSA, including those who do not respond to CPAP.[3] Researchers have also studied who tends to respond well. People who are younger, have a lower body weight, or have a shorter neck are more likely to respond, but this does not predict any one person's result.[2]
Your mouth matters too. The device needs healthy teeth to hold it in place, and one review suggests at least six teeth per jaw as a guide.[2] Gum disease, loose teeth, or jaw joint problems may limit your options. The dentist checks for these during your exam.
- Often a fit: adults with a sleep-study diagnosis who cannot use CPAP, do not want CPAP, or travel often.
- Talk with your physician first: people with severe OSA, since CPAP usually lowers events more.[2]
- Different path: children with sleep apnea need a pediatric evaluation. Studies of dental appliances in children are limited and small.[9] See our pediatric airway guide.
What to Expect: From Diagnosis to Follow-Up
Most people go through the same steps. The number of visits and the timeline vary by dentist and by case.[1][2]
1. Physician diagnosis
A physician reviews your symptoms and orders a sleep test. The test measures how many times per hour your breathing pauses or gets shallow. If you have OSA, the physician discusses treatment options and, if an oral appliance fits, writes a prescription or referral.[1][6]
2. Dental exam
The dentist checks your teeth, gums, bite, and jaw joints, and may take X-rays. This exam finds problems that could rule out a device or need care first.[2]
3. Impressions and fitting
The dentist takes molds or a digital scan of your teeth and records your bite. A lab makes the device. At the fitting visit, the dentist checks that it is snug and comfortable.[2]
4. Titration (gradual adjustment)
Titration means moving the jaw forward a little at a time until your symptoms improve without too much discomfort. The 2023 review says this phase can last up to a few months, and that gradual adjustment may lower the risk of tooth movement.[2] You may feel no benefit right away. That is normal.
5. Follow-up sleep test and long-term visits
The guideline suggests a follow-up sleep test with the device in place, to confirm that it works. It also suggests regular visits with both the dentist and the physician.[1] How you feel is not enough. People can feel better and still have apnea events.[2]
How Well Do Oral Appliances Work Compared With CPAP?
CPAP works better at reducing apnea events. A 2023 meta-analysis of six trials found that CPAP lowered the apnea-hypopnea index (AHI, the number of events per hour) by about 8 more events than an oral appliance.[3] The 2023 review puts the gap at about six to seven events per hour.[2]
Still, oral appliances do help. The same meta-analysis found that they lowered the AHI compared with no device.[3] The review also reports that CPAP and oral appliances give similar improvements in daytime sleepiness and quality of life in many trials.[2]
Adherence is part of the picture. A machine you do not wear cannot help you. Several crossover trials found that more people preferred the oral appliance to CPAP.[2] Still, use tends to drop over time, from about 83 percent at one year to about 62 to 64 percent after four to six years in some studies.[2] For a closer comparison, see our guide on oral appliance vs. CPAP, or explore CPAP alternatives.
Side Effects and Risks
Most side effects are mild and go away as you adjust.[2] A scoping review of patient reports found that oral appliance therapy in adults generally does not cause major problems, though some people report mild discomfort and bite changes.[4]
Common short-term effects include the following.[2]
- Extra saliva or a dry mouth
- Soreness in the teeth, gums, or jaw
- A bite that feels off in the morning
- Trouble chewing for a short time after waking
Long-term changes
Long-term effects are different. The 2023 review says they build slowly and do not reverse. Studies show small shifts in tooth position and bite. After about 11 years of use, one study found the front teeth overlapped less, by about 2 millimeters.[2] Follow-up with your dentist is how these changes get caught early.[1]
If you have jaw pain, stop wearing the device and call your dentist. Do not adjust it on your own beyond what your dentist showed you.
How Much Does a Sleep Apnea Mouth Guard Cost?
Costs vary widely by location, dentist, device type, and case. Our guide to oral appliance cost and insurance explains what affects the price. Some offices include adjustments and follow-up in one fee, and others bill each visit.
Because sleep apnea is a medical condition, medical insurance is usually the payer, not dental insurance. Medicare covers a custom mandibular advancement device when several conditions are met. These include an in-person exam by the treating physician or other practitioner, a qualifying sleep test, a practitioner's order, and a licensed dentist providing the device.[6] Private plans set their own rules, so call your plan before you start.
For a detailed breakdown, see our guide to sleep apnea oral appliance cost and insurance.
How to Find a Dentist Who Provides Oral Appliance Therapy
Start with the diagnosis. If you snore loudly, wake up tired, or stop breathing at night, talk to your physician about a sleep test. Do not buy a device first. If you already have a diagnosis and want an oral appliance, ask your physician for a referral, or search for a dentist who provides this care.
Dental sleep medicine is not a recognized dental specialty in the United States. A dentist who provides oral appliance therapy is a general dentist or a dental specialist who has taken extra training. The AADSM offers a directory of dentists who meet its qualification standards.[8] Ask any dentist how many patients they have treated, whether they work with your physician, and whether they arrange a follow-up sleep test.
Some dental specialists, such as prosthodontists, make many kinds of dental devices, and some of them also provide sleep appliances. You can browse dentists in our provider directory. When you call, ask each office directly how it handles oral appliance therapy. Browse our list of dentists who provide oral appliance therapy, grouped by state.
