BJJ Mouthguards

A BJJ mouthguard is a thin, fitted shield worn over your upper teeth to absorb accidental impacts from knees, elbows, and heads during drilling and sparring. You need one from your very first class, not just once you start live rolling. The question is not whether to wear one, but which type to buy.

For most BJJ practitioners, a well-moulded boil-and-bite guard is the practical starting point. If you train four or more times a week or compete regularly, a dentist-made custom guard is worth the extra cost for the improved fit and breathing comfort.

Why Wear a Mouthguard in BJJ?

BJJ is a contact sport. Although the ruleset for Brazilian Jiu-Jitsu competitions under IBJJF and ADCC standards does not include striking, accidental contact is a daily reality in training. A stray knee to the face while passing guard, a head clash during a scramble, or an elbow during a tight clinch can chip or knock out teeth without warning.

Beyond the teeth themselves, a mouthguard distributes impact force across a larger surface area, reducing stress on the jaw joint and the risk of lip lacerations from teeth cutting through soft tissue on impact.

The financial case is straightforward. Dental treatment for a broken or displaced tooth runs to hundreds of US dollars or several thousand Thai baht at a private clinic. A decent boil-and-bite guard costs a fraction of that amount. If you are visiting Thailand for a training camp or short stay, confirming dental cover on your travel insurance is also wise, as many standard policies do not include sports injuries.

Boil-and-Bite vs Custom: The Two Main Types

Most BJJ players choose between two categories. Understanding what each offers helps you match the guard to your training volume, budget, and comfort preferences.

Boil-and-Bite Mouthguards

A boil-and-bite guard is placed in hot water until it softens, then pressed against the upper teeth and bitten down to create an impression. The thermoplastic material sets around your teeth as it cools, producing a reasonably close fit in a few minutes at home.

These guards are sold at most sports shops in Thailand, including stores in major shopping malls in Bangkok, Chiang Mai, and Phuket, as well as online. Expect to pay roughly 100 to 500 Thai baht (approximately 3 to 15 USD) for a reliable single-arch guard. Branded grappling-specific options from established sports manufacturers sit toward the upper end of that range.

The main limitation is fit accuracy. A home mould is never as precise as a dental impression, which means the guard may feel slightly loose over time as the material fatigues. Most practitioners replace boil-and-bite guards every six to twelve months.

Custom-Fitted Mouthguards

A custom guard is made from a stone cast taken directly from a dental impression of your teeth. Your dentist sends the impression to a laboratory, and the finished guard is made from a harder, thinner material that fits with greater precision.

The result is noticeably more comfortable and less intrusive during breathing, which matters in a sport where you are frequently in tight positions with restricted airflow. Custom guards also last longer under heavy use, typically two to three years with proper care, before the material needs replacing.

The cost is considerably higher. At a private dental clinic in Thailand, custom sports mouthguards generally range from around 1,500 to 4,000 Thai baht (approximately 40 to 110 USD), though prices vary by location and clinic. Confirm pricing directly with the clinic, as fees differ between cities and between Thai-language and English-language practices.

A custom guard is most justified if you train BJJ five or more times per week, compete regularly, or have had dental work such as crowns or bridges that need careful protection.

Side-by-Side Comparison

Feature	Boil-and-Bite	Custom-Fitted
Approximate cost (Thailand)	100 to 500 THB	1,500 to 4,000 THB
Fit accuracy	Good	Excellent
Breathing comfort	Adequate	Superior
Speech clarity	Moderate	Good
Typical lifespan	6 to 12 months	2 to 3 years
Available without appointment	Yes	No
Suitable for beginners	Yes	Yes, but cost may not be justified early on
Best for	Hobbyists, beginners, budget-conscious trainees	Frequent trainers, competitors, those with dental work

What Good Fit Looks Like

Fit is the single most important factor in a mouthguard, regardless of type. A guard that moves around during sparring provides inconsistent protection and will distract you from technique. Here is what to look for when checking fit.

• Stays in place without biting down. A correctly fitted guard should hold to your upper teeth without needing to clench. If you have to bite down to keep it in, the fit is too loose.
• No excess material at the back. The guard should end before the soft palate. Material that extends too far back triggers the gag reflex and makes breathing feel laboured during hard rounds.
• Even contact across all teeth. Press your tongue against the guard from the inside. You should feel consistent resistance, not soft spots or gaps where certain teeth are not covered.
• No distortion of the bite. Bite down normally. Your back teeth should meet evenly. If you feel lopsided pressure, the moulding process went wrong and you should re-boil and repeat.

Materials and What They Mean for You

Most affordable mouthguards use EVA (ethylene vinyl acetate), a foam-like thermoplastic that softens in hot water, making boil-and-bite moulding possible. EVA is lightweight and flexible, though it compresses with heavy use and loses shock absorption over time.

Higher-end boil-and-bite guards and all custom guards use denser, dual-layer materials that combine a hard outer shell with a softer inner lining. The hard shell keeps its shape under repeated impact; the soft inner layer cushions the teeth. If the packaging mentions a dual-layer or laminated construction, that is a meaningful upgrade over single-layer EVA for anyone training more than twice a week.

Latex-free construction matters if you or a training partner has a latex allergy. Most modern sports guards are latex-free, but it is worth confirming, particularly with budget options sold without clear ingredient labelling.

Gi vs No-Gi Considerations

The type of guard you choose is the same regardless of whether you train in a gi (kimono) or no-gi. No-gi training does sometimes involve tighter clinch work and faster head movement, which can increase the frequency of accidental contact. This is worth bearing in mind if your training is predominantly no-gi and you are on the fence about upgrading from a basic guard.

For those who train both formats, one well-fitted guard serves both. There is no separate mouthguard designed exclusively for gi or no-gi BJJ.

Caring for Your Mouthguard

A mouthguard stored and cleaned properly lasts longer and stays hygienic on shared mats. Follow these habits from day one.

• Rinse with cold water immediately after every session. Never use hot water, which warps the material.
• Clean it with a toothbrush and mild soap or an over-the-counter denture tablet a few times per week.
• Let it dry completely before returning it to its case. A damp guard in a sealed case breeds bacteria rapidly in Thailand's humidity.
• Use a ventilated case, not a sealed container. Most guards come with a case that has ventilation holes; use it.
• Keep it away from direct sunlight and high heat, such as the inside of a car left in the sun, which can warp the material permanently.

Inspect your guard every month for thinning, visible holes, or softness. A worn guard offers less protection and should be replaced promptly.

Buying a Mouthguard in Thailand

Thailand is well supplied with sports shops in every major city. In Bangkok, Chiang Mai, and Phuket, you will find boil-and-bite guards at sporting goods chains in shopping malls. Supermarkets and pharmacies sometimes carry basic models as well. Many BJJ gyms across Thailand stock a small selection of guards at reception, which is convenient when you have forgotten yours or are on a trip and need one quickly.

For training in Chiang Mai specifically, see the gear hub for broader advice on sourcing BJJ equipment locally. If you are new to training altogether, the first class guide covers everything else you need to bring.

Online orders within Thailand are also straightforward. Major e-commerce platforms serving Thailand carry a wide range of sports mouthguards with delivery to most cities within a few days.

Frequently Asked Questions