Do UFC Mouthguards Prevent Concussions? What Data Shows

Quick answer

UFC mouthguards help protect teeth and surrounding tissues, but their effect on concussion risk in MMA remains uncertain. A 2019 review found more than double the oral-injury risk among athletes who didn't wear one. Its concussion findings were inconclusive. A newer review found lower concussion rates with mouthguards in collision sports, but that isn't a UFC-specific result. You should wear a well-fitting mouthguard for contact training. You shouldn't read its presence, price or branding as proof that a fighter can safely absorb more head strikes.

Data snapshot: A 2019 injury review included 26 studies; its oral-injury cohort analysis used 12 studies, and its concussion analysis used five. A 2023 concussion review searched through March 2022. These are cross-sport findings, not an AgentMMA fight-outcome study.

What do UFC mouthguards actually protect?

The clearest case for a mouthguard concerns your mouth. Teeth, gums and nearby soft tissues face direct contact during striking and grappling. Protection against those injuries has value even if brain protection remains uncertain.

The UK's Faculty of Sport and Exercise Medicine recommends well-fitting mouthguards whenever training or competition creates an oral-injury risk. Its guidance covers fit, retention and replacement, rather than treating every piece of plastic as equally useful.

That distinction matters when you watch MMA. A mouthguard is protective equipment with a specific job. It doesn't make the person wearing it immune to damage.

Nor does a dental injury prove the equipment offered no protection. To make that claim, you'd need to know what would have happened without it. A replay cannot supply that comparison.

Think of effectiveness as a change in risk across comparable groups. It isn't a promise about the next punch.

What does the mouthguard research actually show?

Joseph Knapik and colleagues published their injury review in Sports Medicine in 2019. Across 12 cohort studies, athletes without mouthguards had 2.33 times the oral-injury risk of wearers. The 95% confidence interval ran from 1.59 to 3.44.

Their concussion analysis gave a less certain answer. Across five cohort studies, the risk ratio was 1.25 for non-wearers versus wearers. Its interval included 1, the value representing no difference.

Paul Eliason and colleagues published a newer concussion review in the British Journal of Sports Medicine in 2023. They reported an incidence rate ratio of 0.74 for mouthguard wearers in collision sports.

Watch the comparison column. The newer analysis reverses which group appears first, so a smaller number points toward protection. The studies also use different measures: risk ratios and incidence rate ratios aren't interchangeable.

The newer estimate corresponds to a 26% lower relative rate. It doesn't mean 26 fewer concussions per 100 UFC fights. You'd need a relevant baseline rate to estimate an absolute reduction.

These results support neither a blanket dismissal of concussion protection nor a claim that it is proven in UFC competition.

Why can't you apply that concussion percentage to MMA?

A result belongs to the setting that produced it until evidence supports taking it elsewhere. Collision-sport athletes and UFC fighters face different contact patterns, equipment and competitive demands.

That doesn't make outside evidence useless. It tells you what question to test next. The missing step is measuring whether the same association holds under MMA conditions.

You also need a fair comparison. Fighters who choose a particular mouthguard may differ in dental care, training habits or previous injuries. Those differences could affect injury rates independently of the equipment.

Compulsory use creates another problem for researchers: a league where everyone should wear a mouthguard offers no straightforward unprotected control group. Comparing brands would answer a narrower question.

An MMA study would need consistent clinical injury definitions, exposure records and information about fit. Recording only whether someone wore a guard would leave much of the question unanswered.

Until then, a cross-sport percentage shouldn't become a fighter's personal concussion forecast.

What did Silva versus Bisping show about lost mouthguards?

Michael Bisping's fight with Anderson Silva in London in February 2016 shows why losing a mouthpiece creates a rules problem as well. Late in Round 3, Bisping lost his mouthguard and looked toward the referee. Silva landed a flying knee while the action remained live.

UFC's official results report confirms that Bisping continued and won by unanimous decision. The incident illustrates a narrow point: a fallen mouthguard doesn't automatically pause a fight.

Ohio's published MMA rule gives a clear example of the procedure. A round cannot start without a mouthpiece. If it comes out during action, the referee arranges replacement at a suitable opportunity without interrupting the immediate exchange. Deliberately spitting it out can bring a point deduction.

Check the governing commission's rules for a particular event. Ohio's wording is a documented example, not a claim that Ohio regulated the London bout.

Silva–Bisping cannot tell us how much protection a mouthguard would have provided against that knee. Nor does Bisping's eventual win establish that the incident was medically harmless.

The replay shows what happened. It cannot show the alternative outcome.

Do mouthguards make breathing or cardio worse?

A poor fit deserves attention, but mouthguards don't automatically wreck athletic performance. Gustavo Barbosa Ferreira and colleagues examined 15 trials involving 312 athletes in their 2019 review. They concluded that custom-made mouthguards did not impair performance.

That finding doesn't guarantee that every off-the-shelf guard feels comfortable. It also doesn't prove that a particular model improves UFC endurance or helps you win fights.

Keep those claims separate. Being able to train without a measurable performance penalty is useful enough. It doesn't need a promise of extra power.

The FSEM guidance says a guard should remain in place when you breathe and open your mouth. If you need constant effort to retain it, ask a dental professional to check the fit.

For someone choosing an MMA mouthguard, fit is a practical question you can assess. A claim about greater knockout resistance requires evidence you cannot get by trying it on.

Can UFC smart mouthguards detect or prevent concussion?

Measuring a head impact and proving injury prevention are different tasks. On June 10, 2025, UFC announced a research collaboration with Sports & Wellbeing Analytics. It described PROTECHT mouthguards designed to record head impacts and heart rate.

That announcement establishes the project's purpose. It doesn't report a controlled reduction in UFC concussions, or establish that a sensor can replace clinical assessment.

For analysts, the useful question is what happens after a measurement. Researchers must test whether staff responses change exposure, then whether those changes reduce diagnosed injuries.

A sensor could help researchers study training loads that fight results cannot describe. But collecting more data and proving a health benefit remain separate stages.

Treat the technology as a research tool whose claims need validation. A device's presence in the Octagon doesn't settle its medical effectiveness.

How solid is this data?

The oral-injury evidence is more consistent than the MMA-specific concussion evidence. Knapik's review also flags varied study designs, mouthguard types and injury definitions. Pooling those studies doesn't remove their weaknesses.

The 2023 review provides newer concussion evidence, but the collision-sport estimate isn't a UFC subgroup result. Its literature search ended in March 2022. Publication year and data cutoff are different things.

This article combines published reviews, professional guidance, a commission rule and UFC reporting. It doesn't calculate a new UFC injury rate, rank mouthguard brands or infer medical diagnoses from fight footage.

Silva and Bisping provide an example of equipment loss during a live exchange. They aren't a clinical comparison group. The biggest unanswered question remains the size of any concussion benefit under MMA conditions.

FAQ

Do UFC mouthguards prevent concussions?

Mouthguards reduce oral-injury risk, but a UFC-specific concussion reduction hasn't been established by the evidence reviewed here. Newer research reports lower concussion rates in collision sports. That finding supports further MMA research, not a guarantee against brain injury.

What happens if a UFC fighter loses their mouthguard?

The referee arranges replacement at an appropriate break in the action. The fight doesn't automatically stop when the guard falls out. Commission rules govern the procedure, and deliberate removal can lead to penalties.

Are custom mouthguards better for MMA?

FSEM guidance favors professionally fitted custom mouthguards for dental protection. Fit and retention matter, while stronger comparative research is still needed. A custom guard shouldn't be marketed as proven protection against UFC knockouts or concussions.

Can you breathe properly with a mouthguard?

A well-fitting mouthguard should stay in place while you breathe. Ferreira's review found that custom-made guards did not impair athletic performance. If yours feels restrictive or keeps moving, have its fit checked rather than abandoning protection.