Quick answer: A tongue retaining device (TRD) is an oral appliance with a soft bulb that holds the tip of your tongue forward by gentle suction, so the tongue can't fall back and narrow your airway while you sleep. "TRD" usually refers to the clinical, custom-made version that a dentist fits as part of sleep apnea treatment; the pre-made, over-the-counter versions sold for snoring (such as AVEOtsd and Good Morning Snore Solution) are usually called tongue stabilizing devices (TSDs). Both work the same way, but only a doctor can diagnose sleep apnea, and an apnea appliance should be prescribed and fitted through a dentist.
If you've searched for a "sleep apnea tongue device", a "tongue placement device" or even a "sleep apnea mouthpiece tongue depressor", you've almost certainly been looking for a tongue retaining device. This guide explains what TRDs are, how they differ from the tongue stabilizers you can buy online, what the research actually shows, who they suit, and when you need a dentist and a sleep doctor rather than a shopping cart.
If you want the basics on the over-the-counter category first, read our explainer What Is a Tongue Stabilizing Device? and our roundup of the best tongue stabilizing devices.
What Is a Tongue Retaining Device (TRD)?
A tongue retaining device is an intraoral appliance built around a hollow bulb (sometimes called a lingual compartment) that sits in front of your teeth. You squeeze the bulb, insert the tip of your tongue, and release. The light negative pressure keeps the tongue pulled forward all night.
Why does that matter? When you fall asleep, the muscles of the tongue and throat relax. In many people, the base of the tongue drops back toward the throat, partly blocking the airway. Air forced through that narrowed passage makes soft tissue vibrate, which is snoring. In obstructive sleep apnea (OSA), the airway narrows or closes repeatedly, interrupting breathing. Holding the tongue forward keeps more room at the back of the throat.
A short history
The TRD is not a new gadget. It was invented by Charles Samelson, MD, a psychiatrist who was trying to solve his own snoring, and studied with sleep researcher Rosalind Cartwright at Rush University. Their paper in JAMA in 1982 fitted the device to 20 men with diagnosed sleep apnea and reported significantly improved sleep and fewer, shorter apnea events on nights the device was worn (Cartwright & Samelson, JAMA 1982). That work helped open the door to oral appliances as a recognized treatment for sleep-disordered breathing.
TRD vs TSD: is there a difference?
The terms are often used interchangeably, including in research papers. In practice, this is the useful distinction:
- TRD (tongue retaining device): the clinical term. Traditionally a custom appliance made from impressions of your mouth, and in some designs it also includes trays that fit over the teeth. It is typically provided by a dentist trained in dental sleep medicine after a sleep apnea diagnosis.
- TSD (tongue stabilizing device): usually a one-piece, prefabricated silicone bulb with a flange that rests outside the lips. No impressions, no boiling, no fitting appointment. Sold over the counter for snoring.
Both rely on the same suction principle. The difference is mostly about customization, clinical supervision and what the device is cleared to treat.
Custom TRD vs Over-the-Counter TSD: Comparison
| Custom TRD (dentist-fitted) | Over-the-counter TSD | |
|---|---|---|
| Examples | Lab-made appliances ordered by a dentist | AVEOtsd, Good Morning Snore Solution |
| How you get it | Sleep evaluation, then a dentist takes impressions and fits it | Buy online, no appointment |
| Intended use | Part of a sleep apnea treatment plan (or snoring, after a medical evaluation) | Snoring in adults; the two products above are FDA-cleared as aids to reduce snoring, not as sleep apnea treatment |
| Fit | Shaped to your mouth; dentist can adjust suction and comfort | Standard sizes (some brands offer more than one size) |
| Follow-up | Dentist and sleep physician check results, often with a follow-up sleep test | None; you judge results yourself |
| Cost | Higher; depends on the practice and whether medical insurance covers it | Much lower; check our reviews for current pricing |
On the regulatory point: the FDA's 510(k) database lists AVEOtsd (K231663, cleared 2023) and the MPowRx Snoring Solution, also known as Good Morning Snore Solution (K193239, cleared 2020), as over-the-counter aids for reducing snoring in adults 18 and older (FDA K231663, FDA K193239). If you see an online listing promising to "cure sleep apnea" with an over-the-counter tongue device, treat that as marketing language, not the product's cleared use.
Do Tongue Retaining Devices Work for Sleep Apnea?
The evidence says TRDs can meaningfully reduce sleep apnea severity for some people, but they are not the first choice for most patients, and many people find them hard to keep using.
What the research shows
- Meta-analysis (2017): A systematic review in the American Journal of Otolaryngology pooled 16 studies with 242 patients. On average, the apnea-hypopnea index (AHI, the number of breathing interruptions per hour) fell from 33.6 to 15.8 events per hour, a 53% reduction. Lowest oxygen saturation rose by about 4 points and Epworth Sleepiness Scale scores fell by 2.8 points. The authors concluded TRDs are a statistically effective alternative treatment option for OSA (Chang et al., 2017). Note that the included studies were mostly small, and an average reduction to 15.8 still leaves many patients with residual apnea.
- Head-to-head with a jaw device (2009): A randomized crossover trial of 27 patients compared a mandibular advancement splint (MAS) with a tongue stabilizing device. Both lowered AHI by a similar amount (from about 27 to 11.7 with the MAS and 13.2 with the tongue device). But 68% of patients had a complete or partial response with the MAS versus 45% with the tongue device, compliance was poorer with the tongue device, and 91% of patients preferred the MAS (Deane et al., Sleep 2009).
- Long-term use: A follow-up of 39 tongue-device users from the University of British Columbia found only 35.9% were still using it at 12 months and 15.4% at 30 months. The most frequently reported side effects were mouth dryness and excessive salivation, and 3D analysis showed small tooth movements (Alshhrani et al., Cranio).
The takeaway: a tongue retaining device can work, sometimes about as well as a jaw-advancing appliance on a sleep test, but staying with it night after night is the hard part.
Where TRDs fit in official guidelines
The American Academy of Sleep Medicine (AASM) and the American Academy of Dental Sleep Medicine (AADSM) published a joint guideline in 2015 on oral appliance therapy. Key points (AASM summary):
- CPAP remains the first-line treatment for obstructive sleep apnea.
- Sleep physicians should consider an oral appliance for adults with OSA who can't tolerate CPAP or prefer an alternative.
- That appliance should be provided by a qualified dentist and should be a custom, titratable (adjustable) device.
- Even for snoring alone, a sleep physician (not a dentist and not you) should make the diagnosis, because snoring is a cardinal symptom of OSA.
Most custom oral appliances prescribed today are mandibular advancement devices, which move the lower jaw forward. TRDs tend to be used for specific situations, described below. For a deeper look at how mouthpieces compare with CPAP, see Sleep Apnea Mouthpiece vs CPAP and Can Snoring Mouthpieces Treat Sleep Apnea?
Who Is a Tongue Retaining Device Best For?
Because a TRD holds the tongue rather than gripping the teeth, it can be an option when a jaw device isn't. Situations where dentists commonly consider one:
- Few or no natural teeth, or full dentures. Jaw-advancing devices need healthy teeth to anchor to. A suction bulb doesn't.
- Jaw joint (TMJ/TMD) problems. Pushing the lower jaw forward can aggravate jaw pain. A tongue device leaves the jaw in its natural position. (If jaw pain is your issue with a current mouthpiece, see Jaw Pain From a Snoring Mouthpiece.)
- Dental work in progress. Braces, loose teeth or ongoing restorations can rule out a tooth-borne device.
- People who tried a jaw device and couldn't tolerate it.
Who should avoid one (or get checked first)
- Blocked nose or chronic congestion. TRDs depend on a lip seal around the device, so you have to breathe through your nose. If you can't breathe comfortably through your nose, a tongue device will feel suffocating.
- Anyone with possible sleep apnea who hasn't been diagnosed. Loud snoring with gasping, choking, witnessed pauses in breathing, morning headaches or heavy daytime sleepiness needs a sleep evaluation first. An over-the-counter device that quiets snoring can hide a condition that still needs treatment.
- Central sleep apnea. This is a breathing-control problem, not a blockage. Holding the tongue forward doesn't address it.
- Under 18. The over-the-counter tongue devices cleared by the FDA are for adults.
How Getting a Custom TRD Works
- Diagnosis. A physician orders a sleep study (in a lab or at home) to confirm whether you have obstructive sleep apnea and how severe it is.
- Referral to a dentist. If an oral appliance is appropriate, you're referred to a dentist with training in dental sleep medicine. They examine your teeth, jaw joints and airway.
- Choosing the appliance. For most people with teeth, the dentist will recommend a custom adjustable jaw device. A TRD is more likely when you have dentures, few teeth, or jaw problems.
- Impressions and fitting. The dentist takes impressions or scans, a lab fabricates the device, and you return for fitting and instructions.
- Follow-up. Your dentist checks comfort and side effects, and your physician may order a follow-up sleep test to confirm the device is working.
Costs vary widely by practice and region, and medical insurance sometimes covers oral appliances when they're prescribed for diagnosed sleep apnea. Ask your dentist's office to check your benefits before fabrication.
Common TRD and TSD Side Effects
Research and user experience point to the same handful of complaints:
- Excess saliva or drooling, especially in the first weeks.
- Dry mouth, the other commonly reported side effect in long-term follow-up.
- Sore or tender tongue tip, often from too much suction. Squeezing less air out of the bulb before inserting your tongue usually helps.
- The device slipping out at night, which some people get used to and others don't.
- Small tooth movements over time have been measured in research, so keep your regular dental checkups and tell your dentist you use the device.
If you get persistent pain, sores, or a change in how your teeth meet, stop using the device and see your dentist. Our article Are Snoring Mouthpieces Bad for Your Teeth? covers bite changes in more detail.
TRD vs Mandibular Advancement Device (MAD)
The other big category of snoring and apnea mouthpiece is the mandibular advancement device, which snaps over your teeth and holds your lower jaw (and with it, the tongue) forward.
| Tongue retaining / stabilizing device | Mandibular advancement device | |
|---|---|---|
| What it moves | Tongue only, by suction | Lower jaw, which pulls the tongue forward too |
| Needs healthy teeth? | No | Yes |
| Needs nasal breathing? | Yes, effectively | Helpful but many designs allow mouth breathing |
| Main side effects | Drooling, dry mouth, tongue soreness | Jaw soreness, tooth tenderness, bite changes |
| Patient preference in head-to-head trial | Lower | Higher (91% preferred the MAS in Deane 2009) |
For a full breakdown, read TSD vs MAD. If you have healthy teeth and simple snoring, an adjustable MAD like SnoreRx Plus is usually easier to live with. If you'd rather start with a tongue device, the AVEOtsd review and Good Morning Snore Solution review are good places to compare.
Tips for Getting Used to a Tongue Device
- Practice while awake. Wear it for short periods while reading or watching TV for a few days before sleeping in it.
- Use the least suction that stays put. More suction isn't better; it's the main cause of tongue tip soreness.
- Clear your nose first. Saline rinse or a nasal strip can make nose breathing easier.
- Keep a towel on the pillow for the first couple of weeks while saliva settles down.
- Measure results. Ask your bed partner, or use a snore-recording app. If you've been diagnosed with apnea, only a follow-up sleep test tells you whether it's working.
The Bottom Line
A tongue retaining device is a legitimate, decades-old approach to keeping the airway open by holding the tongue forward. Custom TRDs are prescribed and fitted by dentists, usually for diagnosed sleep apnea when CPAP or a jaw device isn't suitable. Over-the-counter tongue stabilizers like AVEOtsd and Good Morning Snore Solution use the same idea and are cleared for snoring only. They are especially useful if you have dentures, few teeth or jaw problems, but they require nasal breathing and many people find them hard to stick with. If there's any chance you have sleep apnea, start with your doctor, not a mouthpiece.
Shopping for an over-the-counter device? See where to buy an anti-snoring mouthpiece, and if you're weighing a jaw device instead, our honest roundup of SnoreRx complaints and where to buy SnoreRx cover what to expect.
FAQ
What is a TRD for sleep apnea?
A TRD (tongue retaining device) is an oral appliance that holds the tongue forward with suction so it can't block the airway during sleep. For sleep apnea, it should be prescribed after a sleep study and fitted by a dentist trained in dental sleep medicine, as part of a plan that includes follow-up testing.
Is a tongue retaining device the same as a tongue stabilizing device?
They work the same way and the terms are often used interchangeably. "TRD" usually means the clinical, custom-made appliance from a dentist, while "TSD" usually means a prefabricated, over-the-counter device such as AVEOtsd or Good Morning Snore Solution sold for snoring.
Is there a "tongue depressor" mouthpiece for sleep apnea?
Not really. A tongue depressor pushes the tongue down, which isn't how these devices work. People searching for a "sleep apnea mouthpiece tongue depressor" are usually looking for a tongue retaining or tongue stabilizing device, which pulls the tongue forward instead.
How effective are tongue retaining devices?
A 2017 meta-analysis of 16 studies (242 patients) found TRDs cut the apnea-hypopnea index by 53% on average. In a randomized trial, a tongue device reduced AHI about as much as a jaw-advancing splint, but fewer patients responded fully, compliance was lower, and 91% preferred the jaw device.
Can I use a tongue retaining device with dentures?
Yes. Because the device holds the tongue rather than the teeth, TRDs and TSDs are among the few oral appliance options for people with full dentures or few natural teeth. Talk to your dentist about whether to wear dentures with it at night.
Do I need a prescription for a tongue retaining device?
Custom TRDs made for sleep apnea come through a dentist after a medical diagnosis. Some tongue stabilizing devices, including AVEOtsd and Good Morning Snore Solution, are FDA-cleared for over-the-counter sale in the US as aids to reduce snoring, so you can buy those without a prescription.
