If you play contact sports, a mouthguard is essential protection for your teeth. But not all mouthguards are equal. You can buy cheap stock guards for $2-10 at any sporting goods store, or get a custom mouthguard from your dentist for $150-500.
The difference is huge—custom guards absorb 50-60% of impact force, while stock guards only absorb 20-30%. That could mean the difference between a minor injury and losing a tooth.
Three Types Of Mouthguards
Stock mouthguards are ready-made in small, medium, or large sizes. They're cheap but they barely stay in place. They shift around when you get hit and don't fit your teeth well at all.
They don't reduce impact very much. Dentists almost never recommend stock guards because they don't work well.
Boil-and-bite mouthguards are made from plastic that softens in hot water. You boil them, stick them in your mouth, bite hard, and they shape themselves around your teeth. They cost $15-50 and work better than stock because the fit is personalized. The protection is better too, but still not great.
Custom-fabricated mouthguards are made by your dentist. They take an impression of your upper teeth, pour a model, and heat-form a plastic shield over it. They fit perfectly to your teeth, stay in place, and reduce impact force way better than the other types. They cost more ($150-500) but the protection is worth it if you play serious contact sports.
How Custom Mouthguards Are Made
Your dentist takes an impression of your top teeth using alginate (that goopy pink stuff). Then they pour a plaster model of your teeth from the impression. This model goes into a machine with a sheet of plastic. The machine heats the plastic until it's soft, then vacuum pulls it down over the model perfectly. This creates an exact replica of your teeth shape.
Better custom mouthguards use two layers of plastic: a softer outer layer for shock absorption and a firmer inner layer for support. This combination protects better than a single thickness. After making the mouthguard, your dentist trims it to fit your gums properly.
Force Protection Comparison
When researchers tested how much impact force each type stopped, the results were clear. Custom mouthguards reduced impact forces by 50-60%. That means if someone gets hit with 500 pounds of force, a custom guard reduces it to about 200-250 pounds reaching your jaw. Stock guards only reduced force by 20-30%, meaning that same 500-pound hit becomes 350-400 pounds. That's 2-3 times more force reaching your teeth and jaw.
In sports with hard impacts like football, where forces exceed 500 pounds per hit, this difference is huge. A custom guard is way better protection.
Protecting Your Teeth In Contact Sports
Dental injuries happen in about 1 in 1,000 to 1 in 100 athletes in contact sports depending on the sport. The American Dental Association and pediatric dentists strongly recommend mouthguards for basketball, boxing, field hockey, football, ice hockey, lacrosse, rugby, and wrestling.
Sports like swimming and tennis don't require mouthguards since they don't involve facial impact, though accidents can happen. If you have expensive dental work (crowns, bridges, or especially implants), a custom mouthguard is even more important because these restorations can't be saved if they get knocked out. A natural tooth sometimes can be replanted if you keep it in milk and get to a dentist fast, but an implant or crown is lost forever.
Concussions And Mouthguards
Recent research suggests mouthguards might reduce concussion risk. A big review of 23 studies found that athletes wearing mouthguards had about 1.6-1.8 times fewer concussions than athletes not wearing them. That's a meaningful difference if it's real.
Nobody fully understands why. Maybe the mouthguard absorbs force before it reaches your brain. Maybe biting down signals your jaw to protect your spine. Maybe the guard keeps your jaw stable. The truth is, we're not completely sure yet.
What we do know is that mouthguards aren't a proven concussion prevention tool. Other things matter more—following the rules, good coaching technique, and proper equipment maintenance. Mouthguards might help, but they shouldn't be your only concussion prevention strategy.
What Good Fit Looks Like
A proper mouthguard covers all your front upper teeth with at least 3 millimeters of material below your gum line. It sticks to your teeth tightly with no gaps or bubbles. You shouldn't have to bite constantly to keep it in—good fit means it stays put on its own. You should be able to talk clearly and breathe normally while wearing it.
Poor fit (common with stock and boil-and-bite guards) means the guard slips around, interferes with talking and breathing, and doesn't protect well. Bad fit also means athletes don't wear them regularly, which defeats the whole purpose.
When To Replace Your Mouthguard
Mouthguards wear out and need replacing. Check it regularly for cracks, worn spots, or flattened areas that show the plastic is compressed. When you see these signs, get a new one. You should also replace it yearly for heavy users or whenever your dentist recommends.
Kids and teens especially need new mouthguards as they grow because their teeth and jaw change size. A guard that fit perfectly last year might not fit right now. Your dentist can tell you when new impressions are needed—usually every 1-2 years during growth periods.
Sport-Specific Recommendations
If you play high-contact sports like boxing, ice hockey, or field hockey where facial impacts are expected, custom mouthguards make absolute sense. The protection is superior and worth the cost and fabrication time.
For intermediate-risk sports like football, rugby, or soccer with heading, a quality boil-and-bite guard might be adequate protection if cost is a concern. But custom is still better.
For low-risk sports where impact is unlikely, mouthguards might not be required. Still, athletes with expensive dental work might want custom guards just in case since accidents can happen.
New Technology In Mouthguards
Some companies now use 3D scanning and computer design to make ultra-precise custom mouthguards. Computers analyze the scan and design a guard with different thicknesses in different areas for optimal force distribution. The guard is then fabricated by specialized equipment.
This digital approach costs about the same as traditional custom guards ($200-400) but produces possibly better fit and protection. New materials beyond standard plastic are also being researched to improve shock absorption.
Summary
Custom-fabricated mouthguards reduce impact forces by 50-60% compared to 20-30% for stock guards—giving 2-3 times more protection. The American Dental Association and pediatric organizations recommend mouthguards for contact sports including football, ice hockey, lacrosse, and rugby. Emerging evidence suggests mouthguards may reduce concussion risk by 1.6-1.8 times, though this is still being studied.
Custom mouthguards ($150-500) provide far superior fit, retention, and protection compared to boil-and-bite ($15-50) or stock ($2-10) options. Annual replacement or when visible wear appears ensures continued protection. Professional custom fabrication with dual-layer EVA plastic remains the evidence-based gold standard for serious contact sport athletes.
Related reading: Dental Trauma Statistics in Sports: Epidemiology and Gum Health in Contact Sports.
Conclusion
Custom mouthguards reduce impact force by 50-60% compared to only 20-30% for stock guards—giving you 2-3 times more protection. They're worth the investment if you play contact sports like football, ice hockey, or lacrosse. A proper-fitting custom mouthguard stays in place, lets you breathe and talk normally, and may even reduce concussion risk based on emerging research.
> Key Takeaway: The American Dental Association and pediatric organizations recommend mouthguards for contact sports including football, ice hockey, lacrosse, and rugby.