Most people know their dentist looks after their teeth. Fewer know their dentist can also help them breathe better at night, sleep more deeply, and wake up without the heavy, foggy exhaustion that millions of Canadians have quietly normalized as just the way things are.
Sleep apnea is one of the most common and most underdiagnosed chronic health conditions in Canada. And for a growing number of patients, the most effective, comfortable, and sustainable treatment does not come from a physician’s office or a hospital sleep clinic. It comes from a dental office.
Let us walk through what sleep apnea actually is, why so many people have it without knowing, what dentists can do about it, and how to find out whether this applies to you.
The Scale of the Problem in Canada
The numbers are striking. A 2024 study published in the Canadian Journal of Public Health, drawn from the Canadian Longitudinal Study on Aging and involving over 51,000 Canadians, found that 28.1% of adults aged 45 to 85 had moderate to severe obstructive sleep apnea. Of those at high risk, 92.9% were undiagnosed. A CBC report from February 2024 cited sleep physician Dr. Sachin Pendharkar, medical director of the Foothills Medical Centre Sleep Centre in Calgary, confirming that an estimated eight out of ten Canadians living with sleep apnea do not know they have it.
Statistics Canada data showed that 6.4% of Canadians reported a clinical diagnosis of sleep apnea as of 2018, double the rate recorded in 2009. The actual prevalence is almost certainly much higher. The gap between the number of people who have sleep apnea and the number who have been diagnosed and treated is one of the largest in Canadian medicine.
Why does this matter? Because untreated sleep apnea is not simply a sleep quality issue. It is a serious health condition with consequences that extend well beyond feeling tired. It is associated with hypertension, cardiovascular disease, type 2 diabetes, mood disorders, memory impairment, and significantly elevated risk of motor vehicle accidents. The exhaustion it produces is not ordinary tiredness. Some patients describe it as a weight that does not lift regardless of how many hours they spend in bed.
Why so many cases go undiagnosed
Sleep apnea does not always present the way most people expect. Not everyone snores loudly. Women in particular are more likely to report fatigue, headaches, and mood changes rather than the classic loud snoring associated with sleep apnea, which is one reason women are significantly underdiagnosed. Many patients have consulted multiple physicians over years and been told their symptoms were stress, perimenopause, depression, or simply poor sleep habits, before a sleep apnea diagnosis was eventually made.
What Is Obstructive Sleep Apnea?
Obstructive sleep apnea, the most common form, occurs when the soft tissues at the back of the throat collapse during sleep and partially or completely block the airway. When the airway closes, breathing pauses. These pauses typically last between ten and thirty seconds. The brain, registering a drop in blood oxygen, triggers a brief arousal to restart breathing. This cycle can repeat dozens or even hundreds of times per night.
The person with sleep apnea almost never becomes fully conscious during these episodes. They have no memory of them in the morning. What they notice instead are the downstream effects: waking unrefreshed no matter how long they slept, struggling to stay alert during the day, irritability that does not have an obvious cause, and in many cases, a partner who has retreated to another room because of the noise.
The factors that increase the likelihood of developing obstructive sleep apnea include excess weight, particularly when it accumulates around the neck and throat; male sex (men develop OSA at two to three times the rate of pre-menopausal women); age over 45; a naturally narrow airway or larger tongue and tonsils; alcohol consumption especially close to bedtime, which relaxes throat muscles further; and sleeping on your back, which allows the tongue and soft palate to fall backward and obstruct the airway more easily.
The Connection Between Your Dentist and Your Sleep
Here is what most Canadians do not know: dentists are often the first healthcare professionals to spot signs of obstructive sleep apnea, even in patients who have never mentioned sleep concerns.
During a routine dental examination, a dentist can observe several physical signs that are associated with sleep apnea. A small jaw or recessed chin affects the natural position of the tongue during sleep. Scalloping along the edges of the tongue, an impression left by the teeth, suggests the tongue is pressing forward in the mouth and may be obstructing the airway. Wear patterns consistent with teeth grinding at night, called bruxism, are strongly associated with sleep apnea. The jaw clenches as a reflex mechanism when the airway becomes partially blocked. Patients who grind their teeth heavily at night are at meaningfully elevated risk for sleep apnea.
Beyond what we observe in the mouth, dentists are also well positioned to ask about sleep quality as part of a complete picture of a patient’s health. Fatigue, morning headaches, and dry mouth in the morning, all things patients mention casually, can be early indicators worth investigating further.
Most importantly, dentists trained in dental sleep medicine can provide one of the most effective treatments available for mild to moderate obstructive sleep apnea, and increasingly, for patients with more severe sleep apnea who cannot tolerate the standard CPAP machine.
What Is an Oral Appliance and How Does It Work?
An oral appliance for sleep apnea, also called a mandibular advancement device or MAD, is a custom-fitted device worn in the mouth during sleep. It resembles a sports mouthguard but is precisely engineered and individually calibrated. The device holds the lower jaw, the mandible, in a slightly forward position relative to where it rests naturally during sleep. This forward positioning prevents the tongue and soft tissues at the back of the throat from collapsing into the airway, keeping the passage open throughout the night.
The forward positioning is adjustable. Once an appliance is fitted, there is a titration process where the jaw position is incrementally refined over several appointments to find the specific setting that keeps your airway open without causing jaw discomfort. This precision calibration is what makes a custom dental appliance significantly more effective than the boil-and-bite devices sold in pharmacies, which offer no adjustment capability and are not made from your specific anatomy.
Modern oral appliances have benefited considerably from digital dentistry. Many now use intraoral scanning rather than traditional impressions, producing a more precise fit. The materials are more durable, the designs more refined, and the adjustability mechanisms more reliable than earlier generations of devices.
Oral Appliance Therapy vs CPAP: What the Research Actually Shows
If you or someone you know has been diagnosed with sleep apnea, you are likely familiar with CPAP, Continuous Positive Airway Pressure. A CPAP machine delivers a continuous stream of pressurized air through a mask worn over the nose or mouth during sleep, physically preventing airway collapse. It is highly effective when used correctly and consistently.
The problem is consistency. CPAP intolerance is one of the most documented challenges in sleep medicine. Studies consistently show that a significant proportion of patients prescribed CPAP either stop using it entirely within the first year or use it for fewer than the four hours per night required for it to deliver full therapeutic benefit. Mask discomfort, noise, claustrophobia, dry mouth, pressure intolerance, and the inconvenience of travelling with a machine all contribute to abandonment rates that are genuinely high across the research literature.
This is where the clinical evidence for oral appliance therapy has strengthened considerably. A 2024 randomized trial published in the Journal of the American College of Cardiology found that mandibular advancement devices were non-inferior to CPAP in reducing 24-hour mean arterial blood pressure in patients with hypertension and elevated cardiovascular risk. This is a significant finding because blood pressure reduction is one of the primary health outcomes researchers use to measure sleep apnea treatment efficacy. An oral appliance worn consistently through the night was delivering cardiovascular benefit comparable to a CPAP machine in this patient population.
Research has also consistently shown that oral appliances, while typically producing somewhat less reduction in the number of breathing events per hour compared to CPAP under ideal conditions, achieve better real-world outcomes in many patients specifically because they are actually worn. A treatment that is used every night is more effective than a theoretically superior treatment that sits on the bedside table.
Current clinical guidelines from both Canadian and international dental and sleep medicine bodies support oral appliance therapy as a first-line treatment for mild to moderate obstructive sleep apnea and as an evidence-based alternative for patients with more severe sleep apnea who cannot tolerate CPAP. This is not a fringe or experimental approach. It is mainstream, evidence-backed dental sleep medicine.
Signs That You Might Have Sleep Apnea
Sleep apnea is heavily underdiagnosed, and many of the symptoms are ones people dismiss or attribute to other causes. Here are the signs worth paying attention to, especially if several apply to you simultaneously.
- Waking unrefreshed despite a full night in bed, consistently and not just occasionally
- Loud or irregular snoring, particularly snoring that involves gasping, choking, or brief silences followed by a sharp sound as breathing restarts
- Excessive daytime sleepiness that is not explained by a short night; falling asleep easily during quiet moments, in meetings, or while watching television
- Morning headaches that are present before you have had any coffee and resolve within an hour or two of waking
- Waking with a dry mouth or very dry throat, which can indicate mouth breathing triggered by partial airway obstruction
- Difficulty concentrating or memory complaints that feel out of proportion to your age or lifestyle
- Mood changes, irritability, or depression that does not have a clear external cause
- Nighttime teeth grinding which your dentist has observed signs of at your checkups, or which a partner has mentioned
- Needing to wake to urinate frequently, which is more commonly associated with sleep apnea than most people realise; the body’s response to oxygen drops during sleep affects fluid regulation
You do not need to have all of these. If several are consistently present, it is genuinely worth investigating further, starting with a conversation at your next dental or medical appointment.
A note on women and sleep apnea
Women with sleep apnea are significantly more likely than men to present with fatigue, headaches, and mood changes rather than loud snoring. This different symptom pattern means women are often misdiagnosed with depression, insomnia, or hormonal issues for years before sleep apnea is identified. If you are a woman who has been managing persistent fatigue or morning headaches without a clear explanation, sleep apnea is worth raising with your dentist or physician.
What Happens If Sleep Apnea Goes Untreated?
This is important to understand clearly because the stakes are higher than most people realize when they first hear a sleep apnea diagnosis.
Every apnea event, every time breathing stops and restarts, triggers a stress response in the body. Cortisol and adrenaline release. Heart rate fluctuates. Blood pressure spikes briefly. When this happens dozens of times every night for years, the cumulative strain on the cardiovascular system is significant. Sleep apnea is independently associated with hypertension, atrial fibrillation, coronary artery disease, and increased stroke risk. The association is not coincidental. The repeated oxygen drops and stress hormone surges that characterize untreated sleep apnea are a genuine physiological stressor on the heart and blood vessels over time.
Beyond cardiovascular health, untreated sleep apnea affects cognitive function, emotional regulation, and metabolic health. It is associated with higher rates of type 2 diabetes and with worsening of existing mental health conditions. The impaired alertness it produces also carries real safety consequences: research has found that the risk of motor vehicle accidents is significantly elevated in people with untreated sleep apnea.
None of this is meant to alarm you. It is meant to make clear that this is a condition worth taking seriously and worth treating, because the treatment options available today, including dental oral appliances, are genuinely effective and far more comfortable than most people expect.
How the Dental Oral Appliance Process Works at Chiu Dental
If you come to us with sleep concerns, here is what the process looks like from start to finish.
Initial screening. At your regular appointment or a dedicated consultation, we ask about sleep quality, daytime fatigue, snoring, and any symptoms that might suggest sleep-disordered breathing. We also examine your mouth for physical signs associated with sleep apnea, including jaw position, tongue size, tooth wear patterns, and airway anatomy.
Referral for diagnosis. Oral appliance therapy for sleep apnea requires a diagnosis from a physician or sleep specialist. We do not diagnose sleep apnea ourselves; that requires a sleep study, either an in-laboratory polysomnography or a validated home sleep test. If we have concerns after our screening, we will refer you to the appropriate specialist and can recommend resources in the Kitchener-Waterloo area. If you already have a sleep apnea diagnosis and are looking for an alternative to CPAP, or an additional treatment option, we can move more directly into the appliance fitting process.
Impressions and fitting. Once a diagnosis is confirmed and oral appliance therapy is appropriate for your case, we take precise measurements of your teeth and jaw. Modern appliances are designed using digital scans for an accurate, comfortable fit specific to your anatomy.
Titration and adjustment. The initial jaw position set in the appliance is a starting point, not a final setting. Over a series of follow-up appointments, we adjust the forward positioning incrementally until we find the specific jaw position that keeps your airway open throughout the night without causing discomfort. This titration process is what distinguishes a professionally fitted dental appliance from anything available over the counter.
Monitoring and ongoing care. We track how the appliance is performing, check for any changes in your bite or jaw joint over time, and coordinate with your physician or sleep specialist as needed. Long-term follow-up is part of the process, not an afterthought.
Who Is a Good Candidate for an Oral Appliance?
Oral appliance therapy is generally most suitable for adults with mild to moderate obstructive sleep apnea. It is also appropriate for patients with severe sleep apnea who have tried CPAP and find it intolerable, where the evidence supports oral appliance therapy as a meaningful alternative to no treatment.
Candidates typically need to have enough healthy teeth to support the appliance and should not have significant temporomandibular joint problems that would be aggravated by the forward jaw positioning. Patients with central sleep apnea, a different form of the condition where the brain fails to send proper signals to the breathing muscles rather than a physical airway obstruction, are not typically candidates for oral appliance therapy.
The honest answer is that candidacy is individual and requires a proper assessment. If you are curious whether an oral appliance might work for your specific situation, the best starting point is a conversation with our team.
Frequently Asked Questions About Dental Sleep Medicine
I already have a CPAP machine. Can I use an oral appliance instead? Possibly, yes. Many patients with sleep apnea who struggle with CPAP adherence switch to or add oral appliance therapy. This requires discussion with both your dentist and the physician managing your sleep apnea to ensure the appliance provides adequate treatment for your severity of disease. Some patients also use both, alternating based on the situation.
Will an oral appliance be covered by my insurance? Many extended health benefit plans in Ontario include coverage for oral appliances for sleep apnea under their dental or medical benefits, particularly when accompanied by a physician’s diagnosis and prescription. Coverage varies significantly by plan. Our team can help you understand your specific benefits before proceeding with treatment.
Does it take time to get used to? Yes, most patients require an adjustment period of a few weeks. The appliance may feel unusual at first, and some patients experience temporary mild jaw stiffness in the mornings during the adjustment phase. This typically settles once the titration reaches the optimal position and the muscles adapt.
Can an oral appliance completely cure sleep apnea? No. Oral appliance therapy manages and controls obstructive sleep apnea by mechanically keeping the airway open during sleep. It does not change the underlying anatomy or physiology. Sleep apnea typically returns if the appliance is not worn.
My partner says I snore but I feel fine. Should I still be concerned? Snoring is the most common outward sign of airway resistance during sleep and is worth taking seriously even if you personally feel reasonably well. Many people adapt to the fatigue of poor sleep quality to the point where they no longer recognize it as abnormal. A screening conversation with your dentist or physician costs nothing and can clarify whether further investigation is warranted.
One thing worth knowing before your next appointment
At your next regular cleaning at Chiu Dental, mention if you wake unrefreshed most mornings, if a partner has commented on snoring or gasping during your sleep, or if you have been told you grind your teeth. These are the kinds of details that help us see the full picture of your oral and overall health, and they may be the starting point for a conversation that genuinely changes how you feel every day.
Chiu Dental: Comprehensive Dental Care in Kitchener Waterloo
Chiu Dental is Kitchener-Waterloo’s friendly dental home, and dental sleep medicine is a growing part of the comprehensive care we provide to patients across this community. We understand that most people have never associated their dentist with sleep health, and we are all about changing that one conversation at a time.
If you have been waking up tired, if your partner is losing sleep over your snoring, or if you have a sleep apnea diagnosis and are looking for an alternative to CPAP, we would genuinely love to talk. You do not have to live with the exhaustion, and the solution may be simpler and closer than you think.
We are currently accepting new patients at our Waterloo office. Your first step is a consultation where we can assess your situation, answer your questions honestly, and help you understand what the path forward looks like for you specifically.
Our office is located at 113-5 Father David Bauer Dr, Waterloo, ON N2L 6M2. Call us at (519) 884-0887 to book your appointment, or schedule online at hellochiu.com. For dental emergencies, reach us at 1-888-757-9361.
After your visit, we would love to hear about your experience. Leaving us a review helps others in the Kitchener-Waterloo community find the kind of dental care that takes their whole health seriously, not just their teeth.
Chiu Dental. Complete care. Honest answers. Right here in Waterloo.