If you're stepping onto the mats today, wearing a mouthguard BJJ style is probably the smartest move you can make for your face. We've all seen it happen—or maybe it's already happened to you. You're going for a "light" flow roll, someone zigs when they should have zagged, and suddenly there's a stray knee or a forehead connecting directly with your mouth. Without protection, that's a quick trip to the dentist and a very expensive bill that could have been avoided with a small piece of plastic.
It's funny how much time we spend picking out the perfect gi or the coolest rash guard, yet the most important piece of safety gear often gets tossed into the gym bag as an afterthought. But if you value your teeth—and the ability to chew solid food—you really shouldn't skip out on this.
The Expensive Reality of a Stray Knee
Let's be real for a second. Brazilian Jiu-Jitsu is a combat sport. Even though we aren't throwing punches like in Muay Thai or MMA, the impact levels can be surprisingly high. Whether it's an accidental headbutt during a takedown or a heavy cross-face that pushes your lip against your teeth, the risk is always there.
I've seen guys lose front teeth during warm-ups. It wasn't even a high-intensity spar; it was just a weird angle during a technique drill. A dental implant can cost anywhere from $2,000 to $5,000. When you compare that to the cost of even the fanciest mouthguard BJJ enthusiasts recommend, the math is pretty simple. You're basically buying insurance for your smile for the price of a couple of pizzas.
Protecting More Than Just Your Smile
Most people think mouthguards are just for preventing chipped teeth, but they actually do a lot more. When you clench down on a guard during a hard scramble, you're stabilizing your jaw. This helps prevent jaw fractures and can even reduce the risk of those nasty "bell-ringing" moments.
While the jury is still out on exactly how much a mouthguard prevents concussions, many athletes swear that having that cushion between your upper and lower teeth helps absorb some of the shock when your head takes a bump. Plus, it keeps you from biting your tongue or tearing up the inside of your cheeks. There's nothing worse than trying to finish a round while your mouth is filling up with blood because you chomped down on your own cheek during a transition.
Boil-and-Bite vs. Custom Fits
When you're looking for a mouthguard BJJ specifically, you'll usually run into two main options: the "boil-and-bite" versions you find at sporting goods stores and the custom-fit ones made from a dental mold.
The Standard Boil-and-Bite
These are the classics. You drop them in boiling water, wait for them to get soft, and then bite down to shape them. They're cheap, easy to find, and they do the job. The downside? They can be bulky. If you've ever felt like you have a giant hunk of rubber in your mouth that makes you look like a bulldog, you were probably wearing a cheap boil-and-bite. They also tend to fall out if you open your mouth to breathe heavily, which isn't ideal when you're fighting for your life in the bottom of mount.
The Custom-Fit Route
If you're serious about the sport and plan on being on the mats three or four days a week, a custom-fit guard is a game changer. You either go to a dentist or use a home impression kit to get a perfect mold of your teeth. Because it's made specifically for you, it stays locked onto your upper teeth. You can talk, drink water, and—most importantly—breathe without it moving an inch. It's more of an investment upfront, but the comfort level is night and day.
Breathing and Talking on the Mats
One of the biggest complaints people have about wearing a mouthguard BJJ players often mention is the feeling of suffocation. When you're deep into a ten-minute round and your cardio is redlining, the last thing you want is a thick piece of plastic blocking your airway.
This is where the quality of the guard really matters. A good guard should be thin enough that you can breathe through your mouth if you need to, but thick enough to actually offer protection. If you find yourself constantly taking your guard out because you can't catch your breath, it's probably too thick or poorly fitted.
Also, being able to talk is underrated. You need to be able to tell your partner "nice sweep" or ask the coach a question without sounding like you have a mouth full of marbles. Custom guards or high-end thin guards (like the SISU style) are great for this. They allow for much better airflow and communication than the old-school "clunky" versions.
Keeping It Clean (and Not Gross)
We need to talk about the "funk." Jiu-jitsu gyms are already breeding grounds for bacteria, and your mouthguard is no exception. If you just toss it into your gym bag after a sweaty session and leave it there until the next class, you're basically growing a science experiment.
It doesn't take much effort to keep it clean. Rinse it with cold water after every use. Every now and then, give it a scrub with a toothbrush and some non-abrasive toothpaste. You can also buy cleaning tablets meant for dentures or retainers—just drop the guard in a glass of water with a tablet for fifteen minutes, and it'll be fresh as new.
And please, for the love of your training partners, keep it in a ventilated case. Don't be the person whose mouthguard smells like a wet dog from across the mat.
When to Replace Your Guard
Nothing lasts forever, and your mouthguard BJJ is no different. Over time, the material starts to degrade. If you're a "chewer"—someone who constantly gnaws on their guard during breaks—you'll probably need to replace it sooner.
As soon as you notice the edges getting ragged, the fit getting loose, or the plastic getting thin in certain spots, it's time to toss it. A guard that doesn't fit right isn't doing its job. Usually, a good boil-and-bite might last a year, while a high-quality custom one can last several years if you take care of it and your teeth don't shift.
Finding What Works for You
At the end of the day, the best mouthguard BJJ for you is the one you'll actually wear. Some people hate the feeling of anything in their mouth and opt for the thinnest possible protection. Others want the maximum amount of padding because they tend to roll with the "spazzy" white belts who have no control over their limbs.
It might take a little trial and error to find the right fit. Don't be afraid to try a couple of different brands or styles. Ask the people at your gym what they use; usually, the upper belts have gone through five or six different types and can tell you exactly which ones are worth the money and which ones are junk.
Wrapping It Up
It's easy to feel invincible when you're young or just starting out, but one bad collision is all it takes to change your smile forever. Jiu-jitsu is a marathon, not a sprint. You want to be able to keep training for decades, and keeping your teeth intact is a pretty big part of that.
So, do yourself a favor. If you don't have a mouthguard BJJ ready to go in your bag, go grab one before your next class. Your wallet, your dentist, and your future self will definitely thank you when you take a stray elbow to the chin and walk away with nothing but a slightly bruised ego instead of a gap in your teeth. See you on the mats!