A nightguard absorbs grinding force while you sleep. A sports mouthguard absorbs impact from a puck, an elbow or the floor. They’re built from different materials, cover different teeth, and swapping one for the other protects you badly.
Both are routine and both are custom-made from impressions of your own teeth. A nightguard is thin, hard and precise, because it has to sit comfortably for 8 hours without changing your bite.
A sports guard is the opposite. Thick, soft and shock-absorbing.
Nobody could sleep in one, and nobody should play hockey in a nightguard, which cracks under impact rather than cushioning it. Our custom sports mouthguards are made for that specific job.
Built for different forces
Grinding is slow, sustained and repetitive. Hours of sideways pressure, night after night. A guard for that needs to be rigid enough to spread the load across every tooth rather than compress under it.
Impact is the reverse: one enormous force arriving in milliseconds. That needs thickness and give, so the energy dissipates through the material instead of into your teeth and jaw.
Use a soft guard for grinding and you’ll chew through it, sometimes in months. Some people also clench harder against a soft surface, which makes the jaw ache worse.
Use a hard nightguard for sport and an impact can shatter it, turning a protective device into sharp fragments in your mouth.
Side by side
| Nightguard | Sports mouthguard | |
|---|---|---|
| Protects against | Grinding and clenching | Impact and trauma |
| Material | Hard or dual-layer acrylic | Soft EVA, thicker |
| Thickness | 1 to 3mm | 3 to 4mm or more |
| Usual arch | Upper or lower, dentist decides | Upper, unless you wear braces |
| Worn | Overnight | Training and games |
| Typical lifespan | 3 to 5 years | 1 to 2 seasons |
| Replaced because | Worn through by grinding | Compressed, or the athlete grew |
Children and teenagers need sports guards remade more often than the material wear suggests, simply because their jaws are still growing and teeth are still erupting.
Why the boil-and-bite version falls short
For sport, a pharmacy guard is better than nothing and noticeably worse than custom. It’s bulky, it interferes with breathing and speech, and players quietly stop wearing it by week 3.
Fit also drops off as the material relaxes, so a guard that gripped in October is loose by January.
For grinding, a shop-bought guard is a worse idea. It doesn’t cover every tooth evenly, which means a few teeth take all the force, and over months that can actually shift your bite.
Where grinding has already chipped front edges, dental bonding restores the shape once the guard is protecting against further damage.
How a custom guard gets made
- Examination first. Wear patterns, jaw joint comfort and bite are assessed, because the design follows what’s actually happening.
- Scan or impression of both arches.
- Bite registration, recording how your teeth meet.
- Laboratory fabrication to the thickness and material your case needs.
- Fitting appointment, where the guard is adjusted so contact is even across every tooth.
- Review after a few weeks to check comfort and wear marks.
Step 5 is the one that separates a custom guard from a mail-order one. Even contact is the whole point, and that needs articulating paper and a dentist’s hands.
Caring for either one
Rinse it in cool water straight after use, then brush it gently with a soft brush and plain soap. Toothpaste is abrasive and scratches the surface, which makes it collect bacteria.
Never use hot water. It warps both types permanently, and a warped guard is a new guard.
Store it dry in its vented case, not in a gym bag or a car. And bring it to every check-up so wear can be measured, since a guard worn through protects nothing.
Children’s sports guards in particular should be checked each season. You can read more about our practice and how we fit guards for families.
Getting fitted in Aurora
Dana Dental Aurora is at 15277 Yonge St., Suite 1 & 2, Aurora, ON, holding a 5.0 Google rating across more than 485 patient reviews. We’re accepting new patients and Canadian Dental Care Plan patients, and the New Patient Special introductory package is open to anyone joining the practice.
Both guard types are made here, alongside general dentistry, caps and crowns, implants, emergency care, wisdom teeth removal, fillings, pediatric dentistry, root canal therapy, sedation, cosmetic dentistry, bonding, veneers, whitening and bridges.
Evening and weekend appointments work well for sports guard fittings around training schedules. Call +1 (647) 494-5006 or email info@danadentalaurora.ca, and CareCredit financing is available for larger treatment plans.
Every dentist here is licensed and registered with the Royal College of Dental Surgeons of Ontario. If you grind heavily and also wake unrefreshed, mention it, because grinding is sometimes linked to disturbed breathing during sleep and that changes what’s recommended.
Frequently asked questions
Can I use my sports mouthguard at night?
Not advisable. Soft material compresses under sustained clenching, wears through quickly, and can encourage harder clenching. It’s also too bulky to sleep in comfortably, so most people stop wearing it within days.
Upper or lower guard for grinding?
Either works, and your dentist chooses based on your bite, jaw joint and gag reflex. Upper guards are more common, while lower ones suit people who find upper appliances uncomfortable or who have a strong gag reflex.
Do I need a mouthguard for non-contact sport?
Often yes. Basketball, skateboarding, gymnastics and cycling all produce dental injuries from falls and accidental contact. Any sport with a realistic chance of a knock to the face is worth protecting against.
What if I have braces?
You need an orthodontic sports guard designed to fit over brackets and accommodate tooth movement. A standard guard won’t fit and can damage the appliance, so tell your dentist you’re in treatment.
How do I know my nightguard is working?
Morning jaw soreness and headaches usually ease within a few weeks. You’ll also see wear marks on the guard itself, which is the point, since that’s damage the guard absorbed instead of your teeth.
Which one you need
Grinding needs a hard, thin, custom-fitted nightguard. Sport needs a thick, soft, impact-absorbing mouthguard. One guard cannot do both jobs, and using the wrong one leaves you less protected than you think. Have your bite assessed before either is made.
