How to Avoid Grinding Teeth While Sleeping

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You might not know you are doing it. Often a partner notices first, or a dentist points out the wear marks during a routine check-up. Teeth grinding at night, the clinical term is bruxism, affects somewhere between 8 and 31 percent of the population depending on which research you read, and the consequences range from mild morning jaw soreness to cracked teeth and chronic headaches.

The good news is that there are well-established solutions. This guide covers what actually works, starting with night guards and dental appliances, then covering the habits and sleep environment changes that make a real difference alongside any dental device.

What Is Bruxism and How Common Is It?

Bruxism is the involuntary clenching or grinding of teeth, most commonly during sleep (sleep bruxism) but also occurring in waking hours (awake bruxism). Sleep bruxism is classified as a sleep-related movement disorder, which puts it in the same category as restless legs syndrome. It tends to occur during lighter stages of sleep, particularly during transitions between sleep stages, rather than in deep slow-wave sleep.

The forces involved are significant. Conscious chewing generates roughly 20 to 40 pounds per square inch of bite force. Bruxism can generate up to 250 pounds per square inch. That difference explains why the effects accumulate so quickly: enamel that would normally last a lifetime wears away over years of nightly grinding. Jaw joints (the temporomandibular joints, commonly called TMJ) take repeated stress. Headaches develop from sustained muscle tension in the masseter and temporalis muscles on either side of the face.

Many people with bruxism are not aware of it until damage accumulates or a partner hears the grinding. Signs to watch for include: flattened, chipped, or worn tooth surfaces; tooth sensitivity that was not there before; morning jaw soreness or stiffness; dull headaches starting at the temples; pain or soreness in the face or neck; and indentations on the sides of the tongue from cheek biting or pressing the tongue against the teeth during sleep.

Night Guards and Dental Appliances

A night guard, also called an occlusal splint or bite splint, is a removable appliance worn over the upper or lower teeth during sleep. It does not stop the grinding behaviour itself, but it does three important things.

First, it absorbs and redistributes the grinding forces so teeth are not wearing against each other. Second, it prevents the specific tooth-to-tooth contact that produces the characteristic grinding sound and causes enamel wear. Third, depending on design, it can reduce muscle activity in the jaw by repositioning the jaw slightly and reducing proprioceptive feedback that triggers clenching.

For most people with moderate to severe bruxism, a properly fitted night guard is the single most effective protective measure available. It does not address the underlying cause, but it protects the teeth and joints while you work on the contributing factors.

Types of Night Guards: Which Is Right for You?

Night guards are not all the same, and the choice between types matters considerably for both effectiveness and comfort.

Custom-Fitted Dental Appliances

A custom night guard made by your dentist is the gold standard. Your dentist takes an impression of your teeth (or uses a digital scan) and sends it to a dental laboratory, which fabricates an appliance that fits your exact dental anatomy. These typically cover the upper teeth and are made from a hard acrylic material, though the specific design varies by dentist and patient need.

The main advantages of custom appliances are fit precision (which improves comfort and compliance), durability (typically 3-5 years with proper care), and the ability to be adjusted by the dentist if needed. The disadvantages are cost (typically $300-$800 in Canada depending on the provider and design, not typically covered by basic dental insurance) and the 2-3 week wait for fabrication.

Boil-and-Bite Guards (Semi-Custom)

Available at pharmacies without a prescription, boil-and-bite guards are thermoplastic appliances that you soften in hot water and bite into to create a rough impression. They offer more protection than no guard at all, and at $20-$60 they are considerably more accessible.

The limitations are real, however. The fit is imprecise, which can make them bulky and uncomfortable to wear through the night. Some people find them impossible to sleep with. Poorly fitting appliances can also shift teeth slightly over time if worn consistently with a poor fit. They are a reasonable short-term option while waiting for a custom appliance, but most dentists consider them a bridge solution rather than a long-term one.

Over-the-Counter Hard Guards

Some pharmacies stock hard acrylic guards in standard sizes. These offer better durability than boil-and-bite options but still lack the precise fit of a custom appliance. They are sometimes used by people who cannot afford custom devices and find standard boil-and-bite guards too uncomfortable.

Soft vs. Hard Appliances

This is an area of some debate in dentistry. Soft night guards feel more comfortable initially, which improves first-night compliance. However, some research suggests that soft materials may actually stimulate more grinding in some patients because the texture triggers chewing-like muscle activation. Hard acrylic appliances are less comfortable initially but are generally considered more effective for heavy grinders over the long term.

The honest answer is that individual response varies. Some patients do well with soft guards; others find their grinding worsens. Your dentist's recommendation should be based on the severity and nature of your grinding pattern, which they can assess from the wear marks on your teeth.

Getting Fitted and Using a Night Guard

Getting a custom night guard is a straightforward dental procedure. The appointment typically involves a dental examination to assess the extent of wear and the health of your jaw joints, a bite impression or digital scan, and possibly a discussion of whether any accompanying dental work is needed (severely worn teeth may need restoration before a guard is made).

The Fitting Appointment

When the appliance comes back from the lab, you will have a fitting appointment where the dentist checks the fit, makes any necessary adjustments to the bite surface, and explains how to insert and remove it. The first few nights wearing a night guard feel strange to most people; this is normal. Most people adapt within a week to two weeks.

Caring for Your Night Guard

Night guards require basic maintenance to stay effective and hygienic. Rinse under cool water before and after each use. Clean with a soft toothbrush and mild dish soap, not toothpaste, which is abrasive enough to scratch acrylic. Store in the ventilated case provided when not in use. Bring it to dental appointments so the dentist can check for wear and adjust if needed.

Hard acrylic guards can last 3-5 years with proper care. When the material starts to show significant wear or the fit changes (which can happen if teeth shift slightly), it is time for a replacement. A guard that no longer fits correctly does not protect effectively.

What Happens If You Stop Wearing It

A night guard protects your teeth while you wear it. It does not reduce the grinding behaviour itself, so stopping use means resuming unprotected grinding. Many people wear night guards indefinitely as a protective measure, similar to wearing a sports mouthguard. Others combine the guard with stress management and find their grinding reduces to the point where they no longer need it nightly, but this takes consistent effort over months rather than days.

Non-Appliance Approaches to Reducing Grinding

A night guard is protective. If you want to actually reduce the bruxism behaviour, you need to address the factors driving it. These are well-researched and worth taking seriously alongside any dental appliance.

Stress Reduction and Psychological Approaches

The single strongest predictor of sleep bruxism severity is psychological stress and anxiety. Multiple studies have found that periods of high stress correlate with increased grinding activity, and that interventions reducing anxiety tend to reduce bruxism as a secondary effect.

Cognitive behavioural therapy (CBT) for anxiety and stress management has the best evidence base for sustained reduction in bruxism, though it requires time and access to a qualified therapist. Simpler habits that many people find helpful include: a consistent wind-down routine for the hour before bed, progressive muscle relaxation (specifically targeting the jaw muscles), and avoiding emotionally activating content like news or work email close to bedtime.

Jaw Exercises and Biofeedback

Physiotherapists sometimes work with bruxism patients on jaw exercises that stretch and relax the masseter muscle. A common recommendation is to practice consciously relaxing the jaw several times during the day: tongue resting on the roof of the mouth, teeth slightly apart, lips closed but not pressed together. This is the natural jaw rest position that many chronic clenchers have lost the habit of maintaining.

Biofeedback devices exist that detect jaw muscle activity during sleep and provide a mild stimulus to interrupt the grinding episode. Results from research on these devices are mixed; they work better for some patients than others, and the disruption to sleep quality from the feedback signal is a trade-off to consider.

Caffeine and Alcohol

Both caffeine and alcohol are associated with increased bruxism. Caffeine is a stimulant that increases muscle tension and disrupts sleep architecture, both of which can worsen grinding. Alcohol, despite being sedating, suppresses REM sleep and increases sleep disruption in the second half of the night, during which bruxism tends to be more active. Reducing or eliminating both, particularly after mid-afternoon, is worth trying before committing to more involved interventions.

Medications

If your bruxism is severe and significantly affecting quality of life, a conversation with your doctor about pharmacological options is reasonable. Muscle relaxants have been used in some cases. Botulinum toxin (Botox) injections into the masseter muscle reduce the muscle's ability to generate force, which can provide significant relief for some patients. This is a more involved and recurring intervention, but it has good research support for severe bruxism that does not respond to other measures.

Some medications worsen bruxism as a side effect, particularly SSRIs and stimulant medications used for ADHD. If you started experiencing grinding after beginning a new medication, discuss it with your prescribing doctor. Adjusting timing, dose, or medication class may help.

How Your Sleep Environment Affects Bruxism

This is the connection that is least obvious but worth understanding. Bruxism tends to occur during lighter, more fragmented sleep rather than during deep sleep stages. Anything that fragments your sleep, including noise, temperature discomfort, or a mattress that causes pressure-related micro-arousals, increases the time you spend in lighter sleep and therefore increases the opportunity for bruxism episodes.

Temperature and Sleep Depth

A bedroom that is too warm prevents the drop in core body temperature that the brain uses as a signal to deepen sleep. Most sleep researchers recommend a room temperature between 16 and 20 degrees Celsius. A mattress that traps heat compounds this problem. If you are frequently waking with a hot, sweaty feeling, your sleep is shallower than it should be, which can worsen bruxism frequency.

At Mattress Miracle, we carry mattress options with different temperature characteristics. Open-coil and individually wrapped coil systems with breathable comfort layers tend to sleep cooler than all-foam mattresses, which can trap heat around the body. Our mattress selection includes options that address this if heat retention is part of your sleep picture.

Pillow Support and Jaw Tension

An unsupported neck can contribute to jaw tension during sleep. When the cervical spine is misaligned, muscles from the neck up to the jaw compensate, and that chronic tension during sleep can worsen clenching. A pillow that keeps your neck in a neutral position (aligned with the rest of the spine) removes one source of muscular tension that can feed into bruxism.

Side sleepers typically need a firmer, thicker pillow to fill the gap between shoulder and head. Back sleepers need a lower, more contoured pillow that supports the natural cervical curve without pushing the head too far forward. Stomach sleepers, if there are any reading this, really should consider a position change; stomach sleeping creates both neck and jaw tension that is hard to manage with any pillow design.

The quality of your overall sleep matters for bruxism management. Better sleep means more time in deep, restorative stages where grinding is less likely to occur, and less time in the lighter stages where bruxism clusters. A mattress that is appropriate for your body weight and sleeping position, and bedding that keeps you at a comfortable temperature, are part of getting that sleep quality right.

If you are in Brantford or anywhere in the surrounding area, including Paris, Cambridge, Hamilton, or Kitchener, our team is glad to walk you through options. Talia, our showroom specialist, is particularly good at asking the right questions to figure out what is actually causing disrupted sleep for a given customer.

Visit Our Brantford Showroom

We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.

Mattress Miracle — 441½ West Street, Brantford, ON — (519) 770-0001

Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.

If grinding teeth at night is disrupting your sleep, we can help with the sleep surface and pillow side of the equation. Come in and tell us what is waking you up, and we will point you toward options that make a genuine difference.

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• Neck Support While Sleeping: Pillows and Positions That Help
• How to Sleep Better at Night Naturally
• Proven Sleeping Techniques for Better Rest
• Falling Sensation While Sleeping: The Science Behind Hypnic Jerks