A mouthguard is non-negotiable for boxing sparring. This is one of the clearest equipment rules in boxing — yet beginners frequently underestimate its importance or buy inadequate options. Here's what a mouthguard actually does, what types are available, and how to choose the right one.
What a Mouthguard Actually Protects
Teeth and Gums
The most obvious function. A punch to the jaw without a mouthguard can chip or break teeth, and the lips and gums against unprotected teeth. A mouthguard creates a buffer that distributes impact across the guard rather than concentrating it at specific tooth/gum contact points.
Jaw Joint (TMJ)
The temporomandibular joint is susceptible to injury from impact. A properly fitted mouthguard creates a slight separation between the upper and lower jaw, reducing the force transferred to the TMJ from chin impact.
Concussion Reduction (Debated)
The concussion-reduction effect of mouthguards is debated in sports medicine — the evidence is mixed. The clearest effect is on dental injury prevention; brain injury reduction is less definitively established. Don't use a mouthguard as your primary concussion protection — that's what headgear is for.
Types of Boxing Mouthguards
Boil-and-Bite (Most Common for Beginners)
Thermoplastic material that you soften in boiling water and then bite into to create a custom impression. Most accessible option — available at sports stores for $15–50. Provides reasonable fit and protection for recreational training and sparring.
How to use: bring water to boil, remove from heat, submerge guard for 15–20 seconds, remove, allow to cool briefly (10–15 seconds — test temperature on the inside of your wrist), then bite firmly into the guard and hold for 30–60 seconds. Don't breathe in deeply while biting — press guard firmly to upper teeth and form seal with lips.
Custom (Dental) Mouthguard
Made from an impression of your teeth by a dentist or sports mouthguard specialist. Significantly better fit, more comfortable to wear, and better protection than boil-and-bite. Cost: $200–500+ depending on the provider.
Recommended for people who train regularly (3+ times per week) or who spar frequently. The fit improvement is substantial — many people who've only used boil-and-bite are surprised by how much more comfortable a custom guard is.
Stock Mouthguards (Avoid)
Pre-formed, not customised. Generally bulky, uncomfortable, hard to breathe through, and significantly less protective than either boil-and-bite or custom. Not recommended for boxing.
Mouthguard Care
- Rinse with cold water (not hot — hot water can deform the material) after every session
- Store in the ventilated case it came with — not in a bag or pocket
- Clean weekly with a soft toothbrush and gentle soap
- Replace when it no longer fits firmly — typically every 1–2 years for boil-and-bite, longer for custom
Train at Killa Boxing Marrickville. First class free — book at kbf.pro. Boxing equipment available in-store and at killaboxing.com.au.