"Mouth guard" is one phrase doing three very different jobs, and mixing them up is how people end up with the wrong appliance in their mouth. Here's the plain-English sort: night guards protect teeth from grinding and clenching, sports guards protect smiles from flying elbows, and snoring/sleep appliances are a different animal entirely — a medical device we handle through our sleep program, not a guard at all. This guide covers all three honestly.
Signs you grind or clench (most people don't know they do)
Grinding (bruxism) mostly happens in your sleep, so the evidence shows up secondhand: waking with a sore or tired jaw, dull morning headaches around the temples, teeth that look flattened or chipped at the edges, cold sensitivity that creeps in for no clear reason, cracked fillings or crowns, scalloped edges on your tongue — or a bed partner who can hear it (it's a distinctive squeak-crunch, and it's louder than people expect). Stress, caffeine, and certain medications all turn the dial up. We also spot it at checkups before you feel a thing — wear patterns on enamel tell the story plainly.
What a night guard actually does
A night guard is a custom-fitted appliance, usually worn on one arch while you sleep, that puts a durable cushion between your upper and lower teeth. Your jaw muscles can generate remarkable force at night — with nothing in the way, tooth grinds directly on tooth, and enamel loses. The guard absorbs and spreads that force, so the appliance takes the wear instead of your teeth, your crowns, and your fillings. Many clenchers also find their morning jaw soreness and tension headaches ease considerably. One honest note: for true jaw-joint (TMJ-type) problems, a night guard is often a genuinely helpful part of the plan — it protects teeth and can calm overworked muscles — but it isn't a cure-all, and persistent jaw pain deserves a proper exam rather than a guessed-at appliance.
Custom vs. boil-and-bite vs. drugstore
Here's the honest comparison. A drugstore or boil-and-bite guard is inexpensive and better than nothing for short-term use — but it's bulky, fits approximately, tends to fall out or get chewed through, and an uneven fit can put your bite in an awkward position all night. A custom night guard is made from a precise scan or impression of your teeth: slimmer, balanced so your bite meets it evenly, comfortable enough that you'll actually wear it, and built from professional materials that survive years of grinding instead of months. Since the whole value of a night guard is nightly use over years, fit and durability are the entire game — which is why we're straightforward in recommending custom for anyone who genuinely grinds.
Sports guards: for kids' leagues and grown-up hobbies alike
If there's a ball, a bat, a board, or another human being moving fast nearby, a sports guard belongs in the mouth — football and hockey, sure, but basketball, baseball, soccer, martial arts, and skateboarding chip plenty of teeth too. A well-fitted guard protects teeth, lips, and cheeks and helps cushion blows to the jaw. We'll be honest where the old marketing wasn't: claims that mouth guards prevent concussions aren't well supported by evidence — what a guard reliably protects is your smile and the soft tissue around it, which is reason enough. For kids, custom guards can be remade as they grow, and for teens with braces or aligners, tell us — the guard needs to account for that.
The snoring question — read this before buying anything
A night guard does not treat snoring or sleep apnea — it's a cushion, not an airway device. Appliances that help snoring work completely differently (they gently hold the lower jaw forward to keep the airway open), and because snoring can be the loudest symptom of sleep apnea — a medical condition — that path runs through a physician's diagnosis, coordinated with our sleep program, not through a drugstore aisle. A store-bought "snore guard" can quiet the noise while hiding an untreated problem. If snoring is the issue in your house, start with when snoring is worth worrying about or visit Old Betsy Dental Sleep Medicine.
How long guards last — and how to make yours last longer
It depends almost entirely on how hard you grind: a custom night guard commonly serves for several years, while a heavy grinder can chew through one faster — which, remember, is the guard doing its job in your teeth's place. To stretch its life: rinse it with cool water (hot water warps them), brush it gently with a soft brush, let it dry in its ventilated case — and keep that case far from your dog. We are not joking about the dog; dogs find mouth guards irresistible, and we replace more guards for that reason than any other. Bring it to your checkups: we'll check the fit and wear and tell you honestly when it's time.
Let's protect the teeth you've got
Enamel doesn't grow back, and crowns aren't cheap — a well-made guard is some of the least expensive insurance in dentistry. If mornings start with a tight jaw, if your partner hears grinding, or if there's a sports season coming, come see us at our Keene office or our Joshua office and we'll fit you for the right one.