Custom Mouthguard vs Boil and Bite for Young Athletes

Choosing between a custom mouthguard vs boil and bite usually comes up right before a new season, when the gear list lands in your inbox. The store version costs a few dollars and is ready tonight. The custom one takes a dental visit. Both protect teeth, but they don't protect them equally, and the right pick depends on your child's sport, age, and smile.

This guide compares all three types of sports mouthguards side by side: stock, boil-and-bite, and custom-made. You'll see what the research says, when a store guard is good enough, and when an upgrade is worth it. You can also browse all of our dental services for the rest of your family.

What Are the Three Types of Sports Mouthguards?

There are three types of sports mouthguards: stock guards that come pre-formed and ready to wear, boil-and-bite guards that you soften in hot water and mold at home, and custom guards your dentist makes from a scan or impression of your child's teeth. The American Dental Association (ADA) describes all three.

Here's how each one works:

• Stock mouthguards: cheap, pre-shaped, and worn straight from the package. According to the ADA, they often don't fit well and can make breathing and talking hard.
• Boil-and-bite mouthguards: sold at sporting goods stores and drugstores. You soften the plastic in hot water, then bite into it so it takes a rough shape of the teeth.
• Custom mouthguards: made by a dentist for one specific mouth. They cost more because each one is built individually for fit and comfort.

Most kids start with a stock or boil-and-bite guard because that's what's hanging next to the shin guards. That's fine as a starting point. The real question is whether it actually fits once it's in, and whether your child will keep it in for a whole game.

A guard sitting in the bag protects nothing. So comfort isn't a luxury feature here. It decides whether the guard gets worn at all.

Custom Mouthguard vs Boil and Bite: How Do They Compare?

A custom mouthguard usually fits better, stays in place without clenching, and keeps an even thickness over the teeth, while a boil-and-bite guard is cheaper and available today. The ADA calls a dentist-made guard the best option, but it says any mouthguard is far better than none.

The table below puts all three side by side on the things parents actually ask about.

The biggest gap is fit. When a guard is loose, kids clench to hold it in, chew on it, or spit it out on the bench. A snug guard stays put on its own, so your child can call plays and breathe through a hard shift.

What about cost?

Cost is the reason most families start with a store guard, and that's a fair trade-off. A stock or boil-and-bite guard costs little and is easy to replace if it gets lost in a gym bag. A custom guard costs more up front, but it usually lasts longer and some dental plans help pay for it. Think about it per season, not per purchase. If your child chews through two or three store guards a year, the gap shrinks quickly.

Want the full breakdown in the ADA's own words? Its patient page on types of mouthguards and how to care for them covers each option.

Do Mouthguards Really Prevent Dental Injuries?

Yes. Research consistently shows athletes who skip a mouthguard get more mouth and face injuries. A 2019 meta-analysis in Sports Medicine found nonusers had about 2.3 times the risk of orofacial injuries compared with mouthguard users, across 12 cohort studies of sports and exercise activities.

That 2019 review, led by Joseph Knapik of the US Army Research Institute of Environmental Medicine, pooled 26 studies. You can read the abstract of the 2019 Sports Medicine meta-analysis on PubMed. An earlier 2007 review by the same group put the extra risk at 1.6 to 1.9 times when no guard was worn. The 2019 authors also noted that sports can account for up to one-third, or about 33%, of all mouth and face injuries.

One honest caveat. The same 2019 review found only a modest, uncertain effect on concussions. So think of a mouthguard as protection for teeth, lips, and jaws, not as concussion gear. That's still a lot of protection for something that fits in a pocket.

And the stakes are real. The ADA notes a knocked-out tooth can often be saved if it's reimplanted within 30 minutes, which is hard to manage from a hockey rink on a Saturday morning. Preventing the injury is far easier than racing the clock after it.

When Is a Boil-and-Bite Mouthguard Good Enough?

A boil-and-bite guard is often good enough for younger kids in lower-contact sports, for a first season while you see if the sport sticks, or as a backup. The ADA says if a custom guard isn't in the budget, a boil-and-bite or stock guard is still far better than nothing.

Some boil-and-bite models have even earned the ADA Seal of Acceptance. The catch is the molding step. Too little time in the water and the plastic won't shape; too much and it thins out. If you go this route, a careful fit makes a big difference:

1. Read the package instructions first. Water temperature and timing vary between brands.
2. Soften it for the stated time only. Overheating can leave thin spots over the front teeth.
3. Center it, then bite and suck gently. Press it against the gums with your fingers while it sets.
4. Check the fit. It should cover the upper teeth and stay in when your child opens their mouth.
5. Trim only if the instructions allow it. Cutting too much reduces coverage.

Then test it in real life. Can your child talk, drink water, and breathe hard while wearing it? If they keep pulling it out at practice, that's your sign it isn't working.

When Should Your Child Upgrade to a Custom Mouthguard?

Consider a custom mouthguard when your child plays a contact or collision sport, wears braces, has front teeth that stick out, has already had a dental injury, or simply won't keep a store guard in. In those situations, better fit and coverage matter most, and a guard that stays put actually gets worn.

Braces deserve a special mention. The ADA says a properly fitted mouthguard may be especially important for kids with braces, because a blow to the face can damage brackets and cut the lips and cheeks. Boil-and-bite guards can be awkward over brackets, and molding hot plastic onto braces isn't something to try without guidance.

Protruding front teeth carry extra risk too. In a 2018 Cochrane Review by Batista and colleagues, 30% of children with prominent upper front teeth had new front-tooth injuries when orthodontic treatment waited until adolescence. A snug guard adds a layer of protection while those teeth are exposed.

Collision sports are the other big one. The NCAA requires mouthguards for ice hockey, lacrosse, field hockey, and football, according to the 2007 Knapik review. US high school football has required them since the 1962 season, after advocacy by the ADA. And the American Academy of Pediatric Dentistry (AAPD) encourages properly fitted mouthguards in any organized sport that carries a risk of mouth injury.

Not sure where your child falls? That's a quick conversation at a regular checkup.

Picture a 12-year-old hockey player with braces and slightly forward upper teeth. That's three checks on the list above, and a well-fitted guard is doing a lot of work every shift. Compare that with a 7-year-old in a recreational soccer league, where a careful boil-and-bite fit is often plenty for now.

How Often Should Kids Replace a Mouthguard?

Replace a mouthguard right away if it's worn, torn, chewed, or loose. The ADA notes children and teens may need new guards more often than adults because their mouths are still growing. For many kids, that means checking the fit every season and after any new adult teeth come in.

This applies to both types. A custom guard lasts longer, but a nine-year-old's mouth changes fast, so even a perfect fit in September may feel tight by spring. Boil-and-bite guards also soften and distort with chewing, often within a single season.

Watch for these replacement signs:

• Holes, tears, or bite-through spots
• A guard that falls out or needs clenching to stay in
• New adult teeth, braces, or other dental changes
• Warping from heat, like a hot car or dishwasher

Good care stretches its life. Rinse it before and after each use, brush it gently, and store it in a vented case so it can dry. Keep it out of the sun and away from the family dog, which the ADA warns tends to treat mouthguards like chew toys. Bring it to checkups too, so your dentist can look it over.

How Do We Make Custom Mouthguards at Peterborough Family Dental?

We make custom mouthguards from a quick digital scan of your child's teeth, with no messy impression trays. The guard is crafted with our in-house lab, then we check the fit and coverage in the chair and adjust it on the spot, so your child leaves ready for practice.

Our custom sports mouthguards are made for athletes of every age, including kids in braces. Hockey, basketball, soccer, and mountain biking on Monadnock region trails all send kids our way. Since we see your child for regular checkups, we can recheck the fit as their teeth change and tell you when it's time for a new one.

A mouthguard is one part of a bigger picture. Our parent's guide to kids' dental care covers what your child's teeth need at every age, from baby teeth to the teen years.

The best mouthguard is the one your child actually wears. In the custom mouthguard vs boil and bite decision, start with your child's sport and smile, then pick the option that fits well enough to stay in from the first whistle to the last.

Results may vary. Please consult with your dentist at Peterborough Family Dental for personalized treatment recommendations.