You can get a mouth guard three ways: buy one off the shelf at a pharmacy for under $30, order a custom-fit guard from an online retailer for $50 to $200, or have one professionally made by your dentist for $300 to $1,000. The right option depends on what you need it for and how much protection you’re after.
Figure Out Which Type You Need
Mouth guards aren’t one-size-fits-all in purpose. A sports guard absorbs impact to protect teeth during contact. A night guard prevents damage from grinding or clenching while you sleep. And a sleep apnea appliance repositions your jaw to keep your airway open. These are designed differently and aren’t interchangeable. A bulky sports guard won’t address grinding properly, and a thin night guard won’t protect against a hit to the face.
If you grind your teeth, you need a night guard. If you play a contact sport, you need an athletic mouth guard. If you snore heavily or have been diagnosed with sleep apnea, you’ll need a specific mandibular advancement device, which typically requires a prescription.
Stock Mouth Guards
Stock guards come pre-formed in small, medium, and large sizes. You buy them at pharmacies or sporting goods stores for roughly $20 to $30, tear open the package, and wear them. There’s no molding involved. The tradeoff is obvious: they fit loosely, feel bulky, and can make breathing and talking difficult. For casual recreational sports where the risk of dental injury is low, they work in a pinch. For serious athletes or people who grind their teeth at night, they’re not worth the savings.
Boil-and-Bite Guards
Boil-and-bite guards sit in the middle ground. They’re made from a thermoplastic material that softens in hot water, letting you mold the guard to your teeth at home. They cost about the same as stock guards, sometimes slightly more, and they’re widely available at drugstores and online.
To fit one properly, bring a pot of water to a boil and submerge the guard for about 20 seconds until it softens. Pull it out and dip it in cold water for no more than 2 seconds, just enough to make it safe to handle. Then press it firmly onto your upper teeth, biting down and using your fingers and tongue to push the material against your teeth and gums. Hold that position for 30 to 45 seconds. Let it cool for a minute and check the fit. If it’s off, most brands let you reheat and try again.
The fit is noticeably better than a stock guard, but the material thins significantly during the molding process. Research on these thermoplastic materials shows that boil-and-bite guards lose 70% to 99% of their original thickness during forming, compared to only 25% to 50% for professionally fabricated guards. That thinning matters because thicker material absorbs more force. So while a boil-and-bite guard feels more secure in your mouth, it may not protect as well as the fit suggests.
Custom Guards From Your Dentist
A custom mouth guard starts with a dental appointment. Your dentist captures the exact shape of your teeth using either a traditional putty impression or a digital intraoral scanner. Digital scanning has become increasingly common because it’s faster, more comfortable, and eliminates the gag-inducing trays of alginate paste that older methods require. The scan or impression gets sent to a dental lab, where your guard is fabricated on a model of your teeth.
For standard protection, the lab heats a thermoplastic sheet and vacuum-forms it over the model. For high-impact sports like football, hockey, or boxing, labs use a pressure-lamination process that layers multiple sheets of material under heat and high pressure, creating a thicker, more shock-absorbent guard. The whole process, from appointment to pickup, usually takes one to two weeks.
Custom guards fit precisely, stay in place without clenching, and allow normal breathing and speaking. They also cover the teeth and gums more completely than any store-bought option. The downside is cost: most run $300 to $500 from a dentist’s office, with dual-laminated versions reaching up to $1,000.
Custom Guards From Online Retailers
Online dental companies offer a middle path. They mail you an impression kit with putty trays. You take your own dental impression at home, send it back, and receive a custom-fabricated guard in the mail. Prices typically range from $50 to $200, significantly less than a dentist’s office.
The quality depends heavily on how well you take your impression. A sloppy mold produces a sloppy guard. There’s also no professional checking your bite alignment or screening for underlying issues like jaw joint disorders. For straightforward teeth grinding, these services work well for many people. For complex dental situations or high-impact sports, a dentist’s involvement is worth the extra cost.
What Insurance Covers
Dental insurance typically covers night guards at about 50% of the allowable amount, but restrictions apply. Some plans limit you to one guard every 36 months, while others only cover one every five years with a cap as low as $150. Coverage varies widely by plan, so check your specific benefits before assuming you’re covered.
If your insurance doesn’t cover a guard or your out-of-pocket cost is still high, mouth guards are eligible expenses under health savings accounts (HSAs) and flexible spending accounts (FSAs). This lets you pay with pre-tax dollars, effectively saving 20% to 30% depending on your tax bracket.
What to Look for When Buying
The American Dental Association evaluates mouth guards for safety. To earn the ADA Seal of Acceptance, a guard must be made from materials safe for oral use, free of sharp or jagged edges, and pass standardized tests for hardness, tear resistance, impact absorption, and water absorption. Looking for the ADA Seal on packaging is a quick way to filter out low-quality products, especially when shopping over the counter.
Regardless of type, a well-fitting guard should stay in place without you needing to clench, let you breathe and talk without major difficulty, and not irritate your gums or cheeks. If you have braces or other orthodontic appliances, a boil-and-bite or custom guard that accommodates the hardware is essential. Stock guards are generally not safe over braces.
How Long They Last
Custom night guards last between one and five years depending on how aggressively you grind and how well you maintain them. Over-the-counter guards wear out faster, often within a few months of nightly use.
Replace your guard when you notice any of these signs: visible cracks, tears, or deep scratches in the surface; thinning material, especially near the molars where grinding pressure is highest; a loose fit that shifts during sleep; persistent discoloration, calcium buildup, or a foul smell that doesn’t go away with cleaning; or waking up with jaw pain and headaches that had previously resolved. If you find small chips or pieces of plastic in your mouth when you wake up, stop using the guard immediately.
Caring for Your Guard
Rinse your guard with cool water after every use and brush it gently with a soft toothbrush. Avoid hot water, which can warp thermoplastic materials. Store it in a ventilated case so it dries between uses rather than sitting in moisture where bacteria thrive. Periodically soak it in a denture cleaner or a mild solution of hydrogen peroxide and water to prevent buildup. Bring it to dental checkups so your dentist can inspect the fit and condition alongside your teeth.