MMA Mouthguards

Quick answer: an MMA mouthguard must stay stable during striking and on the ground, without forcing you to clench your teeth to keep it in. When you are starting out, a well-fitted boil-and-bite model may be enough. For regular sparring, a custom-fit model generally gives a more precise fit and a profile that is easier to tolerate during long grappling phases.

In this guide

1. The specific demands of MMA
2. Profile and fit
3. Boil-and-bite or custom-fit
4. Testing before sparring
5. Preparing for competition

One mouthguard for striking and grappling

MMA combines very different situations. On your feet, your mouth can take a direct or indirect impact. On the ground, pressure, changes of position and fatigue make an unstable model particularly annoying. A mouthguard that works on the bag can shift while you are wrestling against the cage or passing the guard. So your choice needs to be validated in real training conditions, gradually and under your coach’s supervision.

A mouthguard, or gum shield, mainly protects the mouth and teeth. It should not be presented as insurance against concussion. Prevention also relies on the rules, controlled sparring intensity, technique and stopping immediately if symptoms appear after a blow.

Why profile and fit matter on the ground

In grappling, a bulky model can make your mouth feel more crowded as your breathing speeds up. Conversely, a model thinned too much or poorly moulded can come loose and get chewed without you realising. Look for natural retention on the upper arch, smooth edges and no point pressure on the gums.

Do a simple test: put the mouthguard in, open your mouth, say a sentence, breathe for a minute and then do a few bodyweight movements. It should stay in place without constant sucking. This test does not replace professional advice, but it quickly shows up inadequate moulding.

Which model for how often you train MMA?

For an introduction or occasional training, a properly prepared boil-and-bite mouthguard (thermoformable, moulded at home in hot water) gets you equipped quickly. Take the time to follow the instructions and only remould it if the manufacturer states that the model can be remoulded. If you have to clench to keep it in, do not consider that result normal.

For several sessions a week, regular sparring or a fight camp, the custom-fit range becomes worthwhile. The dental impression allows the shape to be matched more precisely to your teeth. Proteksports manufacturing generally takes 5–10 days after approval: leave yourself time to try the mouthguard before the deadline.

Building the mouthguard into your training

Do not try a new mouthguard for the first time on the day of an intense sparring session. Wear it first during the warm-up, then for technical drills, light grappling and finally controlled rounds. You will be able to spot any difficulty speaking, a rubbing area or an urge to chew without adding the stress of a fight.

If the mouthguard comes out during a transition, stop the drill safely and have its fit checked. Shortening it or heating it without following the instructions can leave an uneven edge and reduce retention.

Checklist before a competition

• Check the rules and any colours that may be banned.
• Inspect the inside, the edges and the areas marked by your teeth.
• Bring a ventilated case and, if possible, a back-up mouthguard you have already tested.
• Never share a mouthguard.
• See a professional after trauma, a loose tooth or persistent pain.

To find out more about the demands of striking, read our guide to the boxing mouthguard. For groundwork without strikes, see the BJJ guide.

Fit, care and ordering

The fitting and care steps common to all sports are in the instructions and the dentist guide.

In MMA, check that it holds on the ground as well as standing, over several progressive rounds, before a competition.