Teeth Grinding (Bruxism): Causes, Damage, and Treatment Options

Bruxism — the involuntary grinding or clenching of teeth — affects an estimated 8% to 31% of adults, depending on how it's defined and measured. Most grinding happens at night during sleep, making sufferers unaware of it until their dentist points out the damage or a sleeping partner mentions the sound. Left unaddressed, bruxism is one of the most destructive forces in dentistry, wearing away enamel, cracking teeth, fracturing fillings and crowns, and causing chronic jaw and neck pain.

How to Know If You Grind Your Teeth

Common signs of bruxism include: waking up with jaw soreness, headaches (especially at the temples), or neck and shoulder tension; a sleeping partner reporting grinding sounds at night; teeth that appear shorter, flatter, or more translucent than they used to be; increased tooth sensitivity; chipped or cracked teeth that don't have a clear trauma cause; indentations on the sides of your tongue or cheek ridges along your inner cheeks (from clenching); and your dentist noting unusual wear patterns on your teeth. Any combination of these signs warrants a conversation with your dentist.

Causes and Risk Factors

Bruxism's causes are multifactorial. Stress and anxiety are the most commonly cited triggers — grinding is essentially a physical outlet for psychological tension during sleep. Sleep disorders, particularly sleep apnea, are strongly associated with bruxism; the repetitive arousal events during apneic episodes can trigger grinding episodes. Certain medications — particularly SSRIs, stimulants like Adderall, and some antipsychotics — increase bruxism risk as a side effect. Caffeine consumption, alcohol, and recreational drug use (particularly stimulants) can worsen grinding. There's also a genetic component — bruxism runs in families.

What Bruxism Does to Your Teeth Over Time

The forces generated by grinding can exceed 200 pounds per square inch — far greater than normal chewing forces, which average 20 to 40 PSI. This sustained excessive force: wears down enamel (which does not regenerate); causes teeth to become shorter, flatter, and more sensitive; creates hairline cracks in teeth that can deepen into fractures; cracks and fractures existing dental restorations (fillings, crowns); contributes to TMJ (temporomandibular joint) dysfunction; and can accelerate bone loss around teeth in patients who also have gum disease.

Nightguards: The Primary Treatment

A custom-fabricated nightguard — a plastic appliance worn over the upper or lower teeth during sleep — is the primary protective treatment for bruxism. The nightguard creates a physical barrier that prevents tooth-on-tooth contact, absorbs grinding forces, and protects restorations. Custom nightguards made by a dentist from impressions or digital scans fit precisely and are far more effective and comfortable than over-the-counter versions from pharmacies. They typically cost $300 to $800 and last 3 to 7 years with proper care. Nightguards do not stop grinding — they protect your teeth while you continue to grind.

Treating the Underlying Cause

To actually reduce grinding, addressing the underlying drivers is important. Stress management — through therapy, exercise, meditation, or other approaches — is consistently associated with reduced bruxism severity. Cognitive behavioral therapy has the strongest evidence base for bruxism reduction among psychological interventions. If sleep apnea is contributing, treating it (often with a CPAP or oral appliance) often dramatically reduces associated grinding. If an SSRI or stimulant medication is a suspected trigger, discuss alternative medications with your prescribing physician — never stop a psychiatric medication without guidance.

Botox for Bruxism

Botulinum toxin (Botox) injections into the masseter muscles — the large jaw muscles that generate grinding force — have gained traction as a bruxism treatment. By partially reducing masseter muscle strength, Botox injections can reduce the force of grinding and relieve jaw muscle soreness. Effects last 3 to 6 months and require repeat treatment. This approach is particularly helpful for patients with severe, refractory bruxism who haven't found relief with nightguards and behavioral approaches. It is not a first-line treatment, but an effective option when others fall short.

Repairing Bruxism Damage

Once bruxism damage is controlled with a nightguard and behavioral approaches, restorative dentistry can address what's been lost. Severely worn teeth can be restored with composite bonding, porcelain veneers, or crowns — but restoring without controlling the bruxism first will quickly damage the restorations. The grinding must be managed before restorative work is done.

Final Thoughts

Bruxism is a condition that patients often aren't aware of until significant damage has occurred. If your dentist raises it, take it seriously — a nightguard is a small investment compared to the restorative work that uncontrolled grinding eventually necessitates. Address stress, evaluate for sleep apnea, and protect your teeth before the damage accumulates.