Sleep Apnea and Your Dentist: How Oral Appliances Work

By Lovik Mirzaeian, DDS. Updated October 2026.

A dental oral appliance treats sleep apnea by holding your lower jaw slightly forward while you sleep, which pulls the tongue and soft tissue at the back of the throat forward too and keeps the airway from collapsing. It looks like a sports mouthguard in two pieces, it is made from molds or scans of your teeth, and it is a well-established option for mild to moderate obstructive sleep apnea and for people who cannot tolerate a CPAP machine. It is not a substitute for a diagnosis. A sleep study has to come first.

Dentists have become a regular part of sleep apnea care, and I fit these appliances in my office. Here is how they work, who they help, and where their limits are.

What Happens in the Airway During Apnea

When you fall asleep, the muscles of the throat and tongue relax. In some people, that relaxation lets the tongue fall back and the soft walls of the throat sag inward until the airway narrows or closes. Breathing stops for ten seconds or longer, oxygen drops, and the brain jolts you just far enough awake to reopen the airway, usually with a snort you do not remember. This can happen dozens of times an hour. The result is unrefreshing sleep, morning headaches, daytime drowsiness, and over years, higher risks for blood pressure and heart problems. Our post on the warning signs of sleep apnea lists what to watch for.

How a Mandibular Advancement Device Works

The most common dental appliance is a mandibular advancement device. Mandibular means lower jaw, and advancement means forward. Two custom trays fit over your upper and lower teeth, connected by small hinges, straps, or a screw mechanism that holds the lower tray a few millimeters ahead of where your jaw would naturally rest. Because the tongue is attached to the lower jaw, moving the jaw forward moves the base of the tongue forward and tightens the soft tissue of the throat. The airway stays open by mechanics rather than by air pressure.

Most devices are adjustable. We start with a small amount of advancement and increase it gradually over weeks until snoring stops and symptoms improve, or until the jaw says enough.

Who Is a Good Candidate

Oral appliances work best for people with mild to moderate obstructive sleep apnea, for loud snorers without apnea, and for people with more severe apnea who have tried CPAP and cannot use it. They are a poor fit for someone with very few teeth, active gum disease, or jaw joint problems that make forward positioning painful, and they are not the right tool for central sleep apnea, where the problem is in the brain’s signaling rather than the airway.

Weight, neck size, and the shape of the throat all affect how well an appliance works, and nobody can predict with certainty who will respond fully. That is why a follow-up sleep test with the appliance in place matters.

Oral Appliance vs CPAP

CPAP is a mask connected to a small pump that blows air into the airway to hold it open. When it is used consistently, it is the more powerful treatment, particularly for severe apnea. The problem is consistency. A large share of people prescribed CPAP stop using it or use it only part of the night because of the mask, the noise, dry nose, or the hose.

An oral appliance is quieter, smaller, needs no electricity, and travels in a pocket. It is generally less effective than CPAP at eliminating every breathing pause, but a treatment you actually use every night beats a stronger treatment sitting in a closet. For many patients with mild to moderate apnea, the results are comparable in practice. Some people use both: CPAP at home and the appliance on trips.

Why a Sleep Study Comes First

I cannot diagnose sleep apnea, and neither can any dentist. Snoring alone does not tell us how often breathing stops or how far oxygen drops. A sleep study, either overnight in a lab or with a home testing kit, measures those things, and a sleep physician makes the diagnosis and decides whether an appliance is appropriate. Then I build and fit it, and we send you back for a follow-up test to confirm it is working. A person who feels better on an appliance can still have significant apnea, and the only way to know is to measure.

If you have symptoms and no diagnosis, start with your physician or ask me for a referral. If you already have a diagnosis and a CPAP you hate, bring your sleep study report to a consultation and we will look at whether an appliance is an option.

Side Effects and Care

The first couple of weeks bring some drooling, a bit of jaw or tooth soreness in the morning, and an odd feeling that your bite is off for a few minutes after removing the device. Those usually settle. Over years, a small number of people notice a lasting shift in how their teeth meet, which is why I check your bite at follow-ups. Clenching and grinding often go hand in hand with apnea, and the appliance can double as protection; our post on signs you grind your teeth at night explains that overlap.

Clean the device every morning with a soft brush and cool water, let it dry, and bring it to dental visits so I can check for wear. A well-made appliance typically lasts several years. The American Dental Association has an overview of the dentist’s role in sleep apnea.

When to See a Dentist

If you snore loudly, wake unrefreshed, or a partner has seen you stop breathing during sleep, mention it at your next routine exam. I look for signs in the mouth, such as a scalloped tongue, worn teeth, and a crowded throat, and I can point you toward testing. Our post on when snoring is more than just noise covers the clues. And if you already have a diagnosis and cannot live with CPAP, an oral appliance consultation is the next conversation to have.

Frequently Asked Questions

Can a dentist treat sleep apnea?

A dentist can make and fit a custom oral appliance that holds the lower jaw forward to keep the airway open, but only after a sleep physician has diagnosed the apnea with a sleep study. The dentist and physician work together, with a follow-up sleep test to confirm the appliance is working.

Is an oral appliance as effective as CPAP for sleep apnea?

CPAP is more powerful at eliminating breathing pauses, especially in severe cases. Oral appliances are close in practical results for mild to moderate apnea because people tend to use them more consistently. Which is better depends on your severity and what you will actually wear every night.

How much does a sleep apnea mouth guard from the dentist cost?

Costs vary with the type of device and the follow-up involved, and a custom appliance is considerably more than a store-bought snoring guard because it is fitted, adjusted, and monitored. Many medical insurance plans cover part of the cost when there is a sleep apnea diagnosis, so check with your plan.

Do sleep apnea oral appliances have side effects?

Early on, most people notice drooling, mild jaw or tooth soreness, and a temporary sense that the bite feels off in the morning. These usually fade within weeks. Over years, a small number of users see a lasting change in how their teeth meet, which regular dental check-ups monitor.

Cannot Tolerate CPAP? Dr. Mirzaeian Can Help

A custom oral appliance may be an option, and we work alongside your sleep physician to fit and adjust it. Please contact us to set up a consultation and bring your sleep study results if you have them.

Lovik Mirzaeian, DDS has achieved extensive training in multidisciplinary dental treatments. His credentials include Dental Implants, Cosmetic Dentistry, Full Mouth Reconstruction, Endodontics, Oral Surgery, Orthodontics, and Sleep Sedation. Our office puts your comfort and smile first, and we are dedicated to giving you top-notch dental care. Get ready to show off your perfect smile!

Looking for a trusted family dentist in Clovis? Dr. Mirzaeian welcomes new patients of all ages.