Most people who grind their teeth at night don't know it. They find out because their partner hears it, or because they keep waking up with a tight jaw, a headache at the temples or teeth that ache for no clear reason. The usual fix is a night guard, and the first question is almost always the same: can I just buy one at the drugstore? Sometimes, yes. Here's how the two options actually compare.
Why grinding is worth taking seriously
Nighttime grinding (bruxism) puts far more force on teeth than normal chewing. Over months and years it can:
- Wear teeth flat and expose the softer layer underneath
- Crack teeth, fillings and crowns
- Make teeth sensitive to cold
- Strain the jaw muscles and joints, contributing to TMJ and jaw pain
A night guard doesn't stop grinding, but it puts a protective layer between the teeth and spreads the force out.
Store-bought guards
Over-the-counter guards come in two types: one-size-fits-all trays and "boil-and-bite" guards you soften in hot water and bite into.
Pros: cheap, available today, useful as a short-term test.
Cons:
- They are usually thick and bulky, which many people find hard to sleep with.
- The fit is approximate, so they can loosen or fall out during the night.
- Soft material can encourage some people to chew on the guard, which may increase muscle activity.
- They wear through faster.
- Nobody checks how your teeth meet with the guard in place.
Custom night guards
A custom guard is made from a scan or impression of your teeth, usually from a hard or dual-layer acrylic, and then adjusted in the office so your bite meets it evenly.
Pros:
- Thinner and more comfortable, so people actually keep wearing it
- Stays in place all night
- The bite is balanced, which matters if you have jaw pain
- Lasts years with care
Cons: it costs more and takes a couple of visits. Some dental insurance plans cover part of the cost when grinding is documented.
Which should you choose?
A store-bought guard can be a reasonable short-term option if you aren't sure you grind, or while you wait for a custom guard. A custom guard is usually the better choice if:
- You already have worn, chipped or cracked teeth
- You have crowns, veneers or implants to protect
- You have jaw pain, clicking or morning headaches
- A pharmacy guard felt too bulky or kept falling out
If you have jaw pain, avoid a guard that only covers some of your teeth unless a dentist designed it, because partial coverage can let teeth shift over time.
Caring for a night guard
- Rinse it after use and brush it gently with a soft brush and cool water.
- Keep it in its case, away from heat and pets.
- Bring it to your checkups so it can be inspected for wear and fit.
Grinding, snoring and sleep
Grinding sometimes goes together with snoring or disrupted breathing during sleep. If you also snore loudly or wake up tired, mention it; read about sleep apnea oral appliances.
Bring your drugstore guard to your next visit if you already have one. We can look at the wear marks on it, check your teeth and tell you whether grinding is likely behind your symptoms. Request an exam whenever you're ready.
