Boil and Bite Mouthguards FAQs Boil and Bite Mouthguards FAQs Learn More

Comfortable

soft and easy fit, non gag

Cost effective

if mislaid or for spares

Re-mouldable

and replaceable

Hygienic

individual antibacterial cases

What are boil and bite mouthguards and how do they work?

Boil and bite mouthguards are a type of self-fitting mouth protection device made from a thermoplastic material that softens when placed in boiling water, allowing it to be moulded to the shape of your individual teeth and gums by biting down on the softened material and pressing it into place with your fingers and tongue. Once the material cools and sets, it retains the impression of your bite, providing a more personalised fit than a standard stock mouthguard that comes in a fixed shape. Boil and bite mouthguards are widely used across contact and combat sports including rugby, boxing, hockey, and martial arts, offering a practical, affordable first step up from a generic one-size-fits-all product.

Boil and bite mouthguards offer a better fit and generally more comfortable protection than stock mouthguards, but they do not provide the same level of retention, comfort, or impact distribution as a professionally custom-fitted mouthguard made from a dental impression. Custom mouthguards are fabricated from higher-grade materials using a precise model of your teeth, providing a far superior fit that does not impede breathing or speaking, and is less likely to be dislodged on impact. For recreational or junior sport, a high-quality boil and bite mouthguard can be an appropriate and cost-effective choice, but for regular competitive sport or contact at a higher level, a custom-made device is the recommended option.

To correctly mould boil and bite mouthguards, start by boiling water in a saucepan and then removing it from the heat before submerging the mouthguard for the time specified in the product instructions — typically between 20 and 45 seconds — until it becomes soft and pliable. Remove it carefully, rinse briefly in cold water for one to two seconds to make it comfortable to place in your mouth, then position it over your upper teeth and bite down firmly while pressing the sides against your teeth with your fingers and drawing in gently with your lips. Hold the position for the recommended time (usually around 30 seconds) before placing it in cold water to set, and repeat the process if the first attempt does not produce a satisfactory fit.

Boil and bite mouthguards should typically be replaced every season or every six to twelve months for regular users, as the material degrades over time through repeated impact, cleaning, and general wear — particularly in the areas that absorb the most force during contact. Signs that it is time to replace your mouthguard include visible cracks, tears, holes, a noticeably loose or distorted fit, or significant thinning of the material in the impact zones. Children and adolescents who are still growing should have their mouthguards checked and replaced more frequently, as changing tooth and jaw dimensions will quickly cause even a well-fitted boil and bite device to become ill-fitting.


Children should begin wearing mouthguards as soon as they start participating in contact or collision sports, regardless of age — protecting developing teeth from trauma is particularly important because damage to baby teeth can affect the healthy development of the permanent teeth beneath. Boil and bite mouthguards are available in junior sizes for younger children, though parents should be aware that regular refitting or replacement will be necessary as the jaw and teeth continue to develop rapidly through childhood and adolescence. Consulting a dentist about the most appropriate mouthguard option for a child’s specific stage of dental development is always advisable, as the right protection at the right age can prevent injuries with lifelong consequences.

Standard boil and bite mouthguards are generally not recommended for people wearing fixed orthodontic braces, as the moulding process can cause the mouthguard to lock around brackets and wires, making it difficult to remove and potentially damaging the orthodontic appliance. There are specialist orthodontic mouthguards available that are designed to fit over braces without adhering to them, and some boil and bite products are marketed specifically as brace-compatible — these are made from softer materials that conform without locking on. Anyone undergoing orthodontic treatment who wishes to play contact sports should discuss mouthguard options with both their orthodontist and their sports provider to find the safest solution.

Many national governing bodies and sports organisations mandate the use of mouthguards in contact and collision sports, and boil and bite mouthguards are widely accepted across rugby union and rugby league, boxing, MMA, hockey, martial arts, lacrosse, and American football at amateur and youth levels. Some sports such as basketball, football, and cricket do not routinely mandate mouthguard use but players may choose to wear them voluntarily, particularly those who have had previous dental injuries. Even in non-contact sports where falls or equipment contact are possible — such as skateboarding, mountain biking, or gymnastics — wearing a mouthguard is a sensible precaution.

After each use, boil and bite mouthguards should be rinsed in cool water and gently cleaned with a soft toothbrush and toothpaste or a dedicated mouthguard cleaning solution to remove bacteria, saliva residue, and any debris. Avoid using hot water for cleaning as this can distort the fit of the thermoplastic material, and never leave the mouthguard in direct sunlight or a hot environment such as a car for the same reason. Store the mouthguard in a ventilated case that allows air circulation to prevent bacterial growth — the rigid case that comes with most mouthguard products is designed for this purpose — and inspect it at each use for any signs of damage or deterioration.

The relationship between mouthguards and concussion prevention is an area of ongoing research, and while boil and bite mouthguards are effective at preventing dental and jaw injuries, the evidence that they significantly reduce the risk of concussion from sports impacts is currently inconclusive. Some studies suggest that well-fitted mouthguards may help absorb and distribute forces from blows to the jaw, potentially reducing the transmission of impact forces to the skull, but this protective effect is considered secondary to their primary role of protecting the teeth and soft tissues. Regardless of the concussion question, wearing a mouthguard in contact sports provides clear dental protection benefits and is strongly recommended.

Boil and bite mouthguards are available in varying thicknesses, typically ranging from around 3mm to 5mm or more, with thicker materials generally providing greater impact absorption in high-contact sports at the expense of a slightly bulkier feel in the mouth. For lower-contact sports or first-time mouthguard users, a 3mm product provides adequate protection with a more comfortable, less intrusive fit that is easier to talk and breathe through. Players in high-impact sports such as boxing, rugby, or ice hockey should opt for thicker, high-density materials or consider upgrading to a custom-fitted device, which can be made to a precise thickness specification across different zones of the mouth to optimise both protection and comfort.The self-fitting boil-and-bite design adapts to any athlete’s dentition. Clubs running multiple martial arts programmes under one roof often use Mouthguards Direct as a single supplier for their entire membership, taking advantage of bulk pricing and the consistent quality of a UK-manufactured product.