Breaking Down Mouthguard Buildup
January 7th, 2026

Mouthguards protect our oral health. They shield our teeth and mouths from injury during sporting activities, prevent damage from tooth grinding, and help treat sleep apnea. But sometimes, these hardworking tools need some TLC of their own. Read on to learn how to keep your appliance its sparkling, healthy best!
Mouthguard Buildup
You might notice after a few months of use that your guard is stained with white spots or a discolored film. Or that there are gritty patches on its smooth surface. Or you might suddenly notice an unpleasant odor.
If you’re wondering what’s happened to your once-pristine mouthguard, let’s break down the source of these stains, deposits, and odors.
- Plaque is a mix of food particles, bacteria, and saliva which sticks to tooth enamel. If it’s not removed, plaque can harden into tartar. And, just like plaque and tartar stick to your enamel, plaque and tartar can transfer from the teeth and stick to your guard, leaving white spots or a discolored film.
- Mineral deposits are another source of white spots and gritty buildup. Calcium and phosphate are two of the minerals found in saliva. They replace the calcium and phosphate minerals which have been stripped from tooth enamel by acidic foods or the acids created by plaque bacteria. And while these minerals are vital for enamel health, they’re not doing your mouthguard any favors! As saliva dries on your appliance, it leaves behind a residue of these white gritty minerals.
- When food particles and plaque build up on teeth, they cause bad breath. When food particles and plaque build up on appliances, they cause an unpleasant odor.
Removing Retainer Buildup
How do we break down this buildup? There are some simple ways to reduce or remove plaque, tartar, and mineral accumulation when you’re taking care of your mouthguard:
- Rinse off your guard as soon as you remove it from your mouth.
- Clean your mouthguard every time you wear it with a soft-bristled toothbrush. Because even non-abrasive toothpastes can be hard on appliances, ask Dr. James Robson which toothpaste—if any—is best.
- Regular deeper cleaning helps reduce the chance of buildup. Your dental team in Robson Dentistry in East Lyme, CT can suggest effective ways to get your guard its cleanest, with recommendations like a white vinegar/water soak or an over-the-counter cleaning product made for appliances. Deep clean weekly or monthly as needed.
- Use cool or lukewarm water to clean or soak, because hot water can warp mouthguards.
- Don’t forget to clean your case regularly, as it can also harbor plaque, minerals, germs, and food particles.
Prevention is best!
Of course, the very best way to reduce mouthguard buildup is to prevent it from accumulating in the first place.
- Keep your teeth clean. When your brushing and flossing is on point, you’ll really reduce the amount of food particles and bacteria which transfer to your appliance.
- If you can’t brush right away, rinsing with water after eating or drinking helps remove food particles and acids from the teeth. Water is also safe to drink with your appliance in place. Which leads us to . . .
- Mouthguards aren’t meant for meals or beverages. Eating solid foods can damage a guard. Food particles stick to appliances. Clear plastic appliances which fit over the teeth can stain. And, because they fit closely over the teeth, these guards can trap foods and beverages next to your teeth, exposing your enamel to sugars and acids over a longer period. Place your guard in its case, enjoy your meal, and brush and floss as directed before your replace the appliance in your mouth.
A clean appliance is a healthy appliance! Keep your mouthguard—and your teeth and gums—in the best of health with simple, daily TLC.



