If your kid plays sports, you’ve probably heard the phrase “wear a mouthguard” more times than you can count. Coaches say it, dentists say it, and other parents say it—usually right after someone takes an elbow to the face during practice. But once you actually start shopping, it gets confusing fast. There are different types, different fits, different price ranges, and a lot of bold claims on packaging.
This guide breaks down the real-world differences between mouthguard types for kids, how to choose the right one for your child’s sport and age, and what “best” actually means (spoiler: it’s not always the most expensive). Along the way, we’ll also talk about how mouthguards connect to overall oral health—because preventing a cracked tooth is great, but preventing the chain reaction of dental problems that can follow is even better.
Why mouthguards matter more for kids than most parents realize
Kids’ mouths are changing constantly. Teeth are erupting, baby teeth are loosening, and jaws are growing. That makes them more vulnerable to certain injuries, and it also makes “one-size-fits-all” protective gear a little trickier.
A mouthguard isn’t just about protecting teeth from breaking. It can help reduce cuts to the lips and cheeks, protect braces and soft tissues, and lower the risk of jaw injuries. While no mouthguard can prevent every concussion (that’s a complicated topic), reducing direct impact to the jaw and teeth can still be a big win.
Another thing that’s easy to overlook: dental injuries rarely happen in a neat, simple way. A chipped tooth can expose sensitive layers, a knocked tooth can affect the developing adult tooth underneath, and a jaw hit can create bite issues that show up later. When you add in the cost and stress of emergency dental visits, mouthguards start looking like one of the most practical pieces of sports equipment your child can own.
What “works best” really means for a kid’s mouthguard
When people ask which mouthguard works best, they usually mean: “Which one will my kid actually wear and which one will truly protect them?” Those are the right questions. The best mouthguard is the one that fits well, stays in place, feels comfortable enough to keep in, and is appropriate for the sport’s level of contact.
In practical terms, a strong mouthguard should:
- Cover the upper teeth (most common) and cushion impacts without being bulky
- Stay secure without constant biting or clenching
- Allow your child to breathe and talk reasonably well
- Have smooth edges that don’t irritate gums or cheeks
- Be easy to clean so it doesn’t become a germ magnet
For kids, “works best” also includes flexibility. A 7-year-old in soccer may not need the same level of protection as a 14-year-old in hockey. And a child with braces needs something designed to avoid snagging or squeezing wires.
The three main types of sports mouthguards (and how they compare)
Stock mouthguards: the quick grab that rarely fits well
Stock mouthguards are the pre-formed ones you can buy at sporting goods stores. They’re cheap, they’re ready immediately, and they come in a few sizes. They also tend to be bulky and loose, which is why you’ll see kids chewing on them like gum or pulling them out to talk.
The biggest downside is stability. If a mouthguard doesn’t stay in place, it can’t reliably absorb or distribute impact. Kids often have to bite down constantly to keep it seated, which can cause jaw fatigue and make them more likely to spit it out during a game.
That said, a stock mouthguard can be better than nothing for low-contact activities when you need something right away. If you go this route, prioritize one that feels as stable as possible and doesn’t force your child to gag. But keep your expectations realistic—this is usually a temporary solution.
Boil-and-bite mouthguards: the popular middle ground
Boil-and-bite mouthguards are softened in hot water and then molded to your child’s teeth. They’re widely available, affordable, and can fit significantly better than stock mouthguards—if they’re molded correctly.
The key phrase is “if they’re molded correctly.” Many parents follow the directions but still end up with a mouthguard that’s too thin in key areas (because it got over-molded), too thick in others, or warped from overheating. If your child bites too hard during molding, you can also end up with a bite-through spot that reduces protection.
For many families, boil-and-bite is the best balance of cost and performance, especially for sports like basketball, soccer, baseball, and general recreation. If your child is in a high-contact sport or has orthodontic appliances, you may want to consider a higher level of customization.
Custom mouthguards: the best fit and protection (especially for serious play)
Custom mouthguards are made from an impression or digital scan of your child’s teeth and are designed to fit their mouth precisely. They’re typically made through a dental office or a dental lab. Because they fit snugly, kids can usually talk and breathe more easily compared to bulky store-bought options.
Protection-wise, custom mouthguards often offer the most consistent impact absorption because the material thickness can be designed strategically instead of relying on whatever shape your child molded at the kitchen counter.
The tradeoff is cost and timing. They’re more expensive and take a little planning. Also, kids grow—so a custom mouthguard might need replacement more often than you’d expect, especially during growth spurts or if your child loses baby teeth and gains new adult teeth quickly.
Matching the mouthguard to the sport: contact level changes everything
Not all sports carry the same risk. A mouthguard for a casual gymnastics class isn’t the same as what you’d want for lacrosse. Thinking in “contact levels” helps you choose without overbuying or under-protecting.
Low-contact sports: still worth protecting teeth
Sports like baseball, softball, skateboarding, biking, and even cheer can involve unexpected falls or collisions. In these situations, mouthguards are more about protecting against sudden impacts rather than constant contact.
A well-fitted boil-and-bite mouthguard is often a solid option here. The goal is comfort and consistency—something your child will actually wear every time without complaint.
If your child has had previous dental work, is prone to falls, or is extra anxious about injuries, a custom mouthguard can still be a great choice, even in low-contact sports. Peace of mind matters, too.
Medium-contact sports: where fit starts to matter a lot
Basketball, soccer, and volleyball may not be classified as “collision sports,” but elbows and heads move fast, and kids don’t always have perfect spatial awareness. These are common sports for chipped teeth and split lips.
This is where a high-quality boil-and-bite mouthguard can do well, but only if it stays in place without constant biting. If your child keeps pulling it out, it’s a sign the fit isn’t right or the mouthguard is too bulky.
For kids who play on competitive teams and practice multiple times a week, custom mouthguards start to make more sense. The more hours they’re wearing it, the more comfort and breathing matter.
High-contact/collision sports: don’t compromise on stability
Football, hockey, lacrosse, martial arts, rugby, and wrestling are in a different category. Impacts are expected, and the force can be significant. In these sports, the mouthguard’s ability to stay seated and distribute impact is critical.
Custom mouthguards are often the top choice for these athletes because they’re secure and can be made with appropriate thickness. Some boil-and-bite guards are marketed for high-contact sports and can work for certain kids, but you’ll want to be picky about quality and fit.
If your child is in a collision sport and also has braces, don’t guess—get guidance. The wrong mouthguard can irritate gums, snag on brackets, or fail to protect properly when it matters most.
Kids with braces, expanders, or retainers: special fit issues to watch for
Orthodontic gear changes everything about mouthguard selection. Braces add hardware that can cut the inside of the mouth during impact, and they also change the shape of the teeth over time. That means the mouthguard needs room to accommodate movement while still providing protection.
Some boil-and-bite mouthguards are labeled “orthodontic,” but results vary. They can be a decent short-term option, especially if your child’s orthodontic situation is changing quickly. The key is ensuring the guard doesn’t press painfully on brackets or wires and that it covers the braces area well enough to protect both teeth and soft tissues.
Custom orthodontic mouthguards can be designed specifically for braces and can be more comfortable, but they may need replacement as teeth shift. If you’re navigating this stage, it can help to learn more about orthodontic treatment and early prevention Greensboro, NC so you can plan mouthguard updates around orthodontic milestones rather than constantly reacting.
How to tell if a mouthguard fits your child correctly (without being a dentist)
Fit is the difference between “my kid wears it” and “it lives at the bottom of the sports bag.” A good fit should feel secure, comfortable, and not interfere too much with breathing.
The stay-put test: no clenching required
Ask your child to place the mouthguard in their mouth and relax their jaw. A well-fitting guard should stay in place without them needing to bite down hard. If it drops, shifts, or feels like it might pop out when they talk, it’s probably not fitted well enough.
For boil-and-bite mouthguards, you can sometimes remold them once or twice (check the instructions). If it still won’t stay put, it may be the wrong size or shape for your child’s mouth.
Also watch for gagging. If your child gags when wearing it, the mouthguard may extend too far back or be too bulky. Trimming some boil-and-bite guards is possible, but be cautious—removing too much can reduce protection or create sharp edges.
Breathing and talking: realistic expectations
No mouthguard feels like wearing nothing. But your child should be able to breathe normally through their mouth and nose while wearing it. If they’re gasping or constantly pulling it out for air, that’s a red flag.
Talking will sound a bit muffled, but they should still be able to communicate basic things like “I’m okay,” “sub me out,” or “ball.” Custom mouthguards usually perform best here because they’re less bulky and more stable.
If your child is anxious about choking, practice at home. Have them wear it for short periods while doing something fun—watching a show, shooting baskets, or doing light drills. Comfort improves with familiarity.
Check the edges: comfort prevents quitting
Run a clean finger along the edges of the mouthguard. If you feel sharp areas or rough seams, it can irritate gums and cheeks quickly—especially during long practices.
Any mouthguard that causes sores, pinching, or persistent pain is not the right one. Kids will tolerate discomfort for about five minutes, and then it mysteriously “disappears” from their mouth during the game.
A mouthguard should protect, not create a new problem.
Materials and thickness: the less obvious details that affect protection
When you look at mouthguards on a shelf, they can seem pretty similar. But the materials and thickness patterns vary, and those differences can affect durability and shock absorption.
EVA and layered designs: what you’re usually buying
Most mouthguards are made from EVA (ethylene-vinyl acetate), a flexible plastic that can absorb impact. Higher-quality guards may use layered construction—so the outer layer is tougher while inner layers focus on comfort and fit.
Layering can help the mouthguard maintain protective thickness in key areas. That matters because if a guard is too thin over the front teeth, it won’t cushion a direct hit as well.
For kids, you’re also balancing bulk. A super-thick mouthguard might be protective, but if it’s uncomfortable, it won’t get worn. The “best” material is the one that your child can keep in their mouth for the whole game.
Durability: bite marks are a warning sign
Some kids chew mouthguards like a stress toy. If you see deep bite grooves, tears, or thinning spots, it’s time to replace it. Those weak areas can reduce protection and may even create choking hazards if pieces break off.
Boil-and-bite guards tend to show wear faster than custom ones, but any mouthguard can wear out. Make it a habit to inspect it weekly during the season.
If your child has jaw clenching habits, ask about mouthguards designed to resist bite-through. It’s not just about longevity—it’s about keeping the protective structure intact.
Care and hygiene: a clean mouthguard is part of protecting your kid’s mouth
Mouthguards spend a lot of time in warm, moist environments, which is basically a dream home for bacteria. Cleaning isn’t optional if you want to avoid funky smells, irritation, or oral health issues.
Easy daily routine that actually gets done
After each use, rinse the mouthguard with cool water (hot water can warp some materials). Then brush it gently with a soft toothbrush. Some families use mild soap; others prefer just water and brushing—either way, keep it gentle and consistent.
Let it air dry completely before storing it. A ventilated case is ideal. If you toss a wet mouthguard into a sealed container, it’s going to smell bad quickly.
Also: label the case. Kids’ sports bags are chaotic, and mouthguards look surprisingly similar when several teammates have the same brand.
Deep cleaning without damaging the fit
Occasionally, you may want to do a deeper clean. Many mouthguards can be soaked in a denture-cleaning solution or a mouthguard cleaner, but check the manufacturer’s instructions. Avoid boiling or using harsh chemicals unless you’re sure it’s safe for that specific guard.
If the mouthguard starts smelling bad even after cleaning, or if it looks cloudy, cracked, or sticky, replace it. Mouthguards are not meant to last forever.
And if your child has had recent cavities or dental sensitivity, hygiene becomes even more important. A dirty mouthguard can irritate gums and contribute to an unhealthy oral environment.
When mouthguards intersect with cavities and dental repairs
Most parents think of mouthguards as purely “injury prevention,” but they can also play a role in protecting dental work and reducing complications. A hit that might have been a small chip can become a bigger break if a tooth already has a weak spot from decay or a large filling.
If your child has had cavities, crowns, or fillings, a properly fitted mouthguard can help protect those restorations. That doesn’t mean you should rely on a mouthguard to “solve” dental problems—but it can reduce the chance that sports impact turns a manageable issue into an emergency.
If you’re currently weighing options to fix cavities for young patients, it’s worth mentioning sports and mouthguard use during your dental visit. The dentist can help you understand whether your child’s teeth need extra protection during the season and whether certain repairs might affect fit.
Choosing the right mouthguard for your child’s age and stage
Age matters, but not just because “kids are smaller.” It’s about what’s happening in their mouth and how responsible they are with gear.
Early elementary: comfort and habit-building
For younger kids, the biggest win is getting them used to wearing a mouthguard consistently. If it’s too bulky, they’ll resist. If it’s uncomfortable, they’ll chew it. If it makes them feel weird, they’ll “forget” it at home.
A softer boil-and-bite mouthguard that molds well can be a great starting point. Focus on fit and comfort over fancy features.
Parents can help by practicing at home and making the mouthguard part of the routine—like shin guards or a helmet.
Late elementary and middle school: growth spurts and mixed dentition
This is the stage where kids may have a mix of baby teeth and adult teeth, and things can change quickly. A mouthguard that fit in September might feel off by January if a new tooth erupts or a baby tooth falls out.
Plan to check fit every few weeks. If the mouthguard starts feeling loose, rubbing, or not covering teeth properly, it’s time to remold (if possible) or replace.
If your child is playing more competitive sports at this age, you might consider a custom mouthguard—just keep in mind you may need to update it sooner than you would for an older teen.
High school: performance, protection, and orthodontic coordination
Older kids often care more about comfort and breathing because they’re playing harder and longer. They’re also more likely to be in collision sports, weight training, and higher-intensity practices.
This is where custom mouthguards really shine, especially for athletes who are serious about their sport. A better fit can mean fewer distractions and better compliance.
If braces are involved, coordinate with the orthodontic plan. A mouthguard that worked at the start of treatment may not work later as teeth shift.
Common mistakes parents make when buying kids’ mouthguards
Even very attentive parents can get tripped up here. Mouthguards seem simple, but small choices affect whether they actually get used.
Buying based on price alone
It’s tempting to grab the cheapest option, especially when kids lose things. But if the mouthguard is uncomfortable or doesn’t fit, it won’t get worn—and then it’s not saving you money at all.
Think in terms of value: a mid-range boil-and-bite that fits well can be a better investment than a cheap stock guard that stays in the bag.
For high-contact sports, spending more for a better fit can be worth it simply to reduce the risk of a costly dental injury.
Not remolding or replacing when the fit changes
Kids grow fast. Teeth shift. Mouthguards wear out. If you treat a mouthguard like a “buy once per season” item without checking fit, you may end up with something that’s barely protective by mid-season.
Make fit checks part of your routine—especially after dental visits, orthodontic adjustments, or when your child mentions discomfort.
And if your child is chewing through mouthguards, don’t ignore it. That’s a replacement issue and possibly a stress or habit issue worth addressing.
Letting kids store mouthguards loose in the bag
A mouthguard rolling around next to sweaty socks and snack wrappers is not ideal. It also gets warped if it’s pressed against hard gear or left in heat.
A ventilated case is a small purchase that makes a big difference. Teach your child that the mouthguard goes in the case every time, just like glasses go in a case.
Also avoid leaving mouthguards in hot cars. Heat can distort the shape and ruin the fit.
When to talk to a dentist (and what to ask)
If your child is in a high-contact sport, has braces, has a history of dental injuries, or simply can’t find a mouthguard that fits comfortably, it’s worth getting professional input. Sometimes the issue isn’t the brand—it’s the shape of the mouth, gag reflex sensitivity, or orthodontic changes that need a different approach.
Dental visits are also a good time to discuss any tooth sensitivity, enamel issues, or existing restorations that could affect how well a mouthguard protects. A dentist can tell you if your child is at higher risk for fractures or if certain teeth need extra attention.
If you’re also in the process of making the right choice for kids’ dental care, consider asking potential providers how they approach sports dentistry for kids—things like custom mouthguards, injury prevention guidance, and what to do if an accident happens during a game.
A simple buying guide: how to pick the best mouthguard in 10 minutes
If you want a quick, practical checklist, here’s a straightforward way to decide without overthinking it.
Step 1: Start with the sport and intensity
Ask: Is this a collision sport? Is my child playing competitively or casually? How many hours per week are they practicing and playing? The more contact and the more hours, the more fit and comfort matter.
Casual soccer once a week might be fine with a good boil-and-bite. Competitive hockey multiple times a week is a strong case for custom.
If you’re unsure, err toward better fit. A mouthguard that stays in place is always safer than one that doesn’t.
Step 2: Consider orthodontics and dental history
Braces, expanders, or frequent dental work can change what’s “best.” In these cases, look for orthodontic-specific designs or ask about a custom option that accommodates shifting teeth.
If your child has had cavities, big fillings, or tooth sensitivity, prioritize a mouthguard that cushions impacts well and fits securely.
Also consider whether your child is likely to chew it. If yes, choose a more durable design and plan replacements.
Step 3: Prioritize comfort so it gets worn
The best mouthguard is the one your child keeps in their mouth. If you can, have them try it on in the store (some places allow this with certain packaging) or be prepared to exchange it if the fit is awful.
Look for a mouthguard that doesn’t feel like a huge block of plastic. Slimmer profiles often improve compliance, especially for kids who are sensitive to bulky gear.
Finally, practice. A mouthguard can feel weird at first, but kids adapt quickly when they use it consistently.
Real-life scenarios: which type tends to work best?
Sometimes it helps to see examples. These aren’t strict rules, but they’re common patterns that can guide your decision.
“My kid plays soccer and basketball, no braces”
A quality boil-and-bite mouthguard is often a great fit here, especially if your child is in the 8–13 age range and still changing teeth. You’ll get better fit than stock without the cost of custom, and you can replace it as your child grows.
If your child complains about breathing or keeps spitting it out, consider upgrading to a slimmer, higher-quality boil-and-bite or a custom option.
Also consider having two mouthguards—one in the sports bag and one backup at home—because mouthguards have a way of vanishing on game day.
“My kid plays football (or hockey/lacrosse) and is really competitive”
Custom is usually the strongest choice for fit, comfort, and reliable protection. In collision sports, stability matters a lot, and custom guards tend to stay seated better.
If you’re using boil-and-bite, choose a higher-end model designed for impact, mold it carefully, and replace it at the first sign of thinning or looseness.
Make sure coaches know your child wears it and reinforce that it stays in during drills, not just during games.
“My kid has braces and plays multiple sports”
Look for orthodontic mouthguards or ask about a custom orthodontic guard. The goal is to protect soft tissues from brackets and to allow room for tooth movement.
Expect to reassess fit more frequently. Teeth can shift quickly during orthodontic treatment, and a mouthguard that was comfortable can start rubbing or feeling tight.
Keep orthodontic wax in the sports bag as a backup for irritation, but don’t rely on wax to compensate for a poorly fitting mouthguard long-term.
What to do if a dental injury happens even with a mouthguard
Even the best mouthguard can’t prevent every injury. If something happens, staying calm and acting quickly can make a big difference.
If a tooth is chipped or broken, save any fragments if possible and contact a dental professional promptly. If a permanent tooth is knocked out, time is critical—handle it by the crown (not the root), keep it moist (milk is often recommended), and seek emergency dental care immediately.
After any mouth injury, replace the mouthguard. Even if it looks okay, it may have stress points or warping that reduces protection. And if your child took a significant hit, it’s worth checking for bite changes, jaw pain, or lingering sensitivity.
Bottom line: the best mouthguard is the one that fits, stays put, and matches your kid’s sport
For many kids, a well-molded boil-and-bite mouthguard is the sweet spot—good protection, reasonable cost, and easy replacement as they grow. For high-contact sports, orthodontic situations, or serious athletes who wear a mouthguard for many hours a week, custom mouthguards often deliver the best combination of comfort and reliable protection.
If you remember only one thing, make it this: fit drives everything. A mouthguard that’s uncomfortable or loose won’t get worn consistently, and consistency is what actually protects your child’s smile.
With the right mouthguard, a good cleaning routine, and regular fit checks, you’ll be doing something simple that can prevent a whole lot of stress—on and off the field.