The short answer
Yes — for the injuries it is built for. A sports mouthguard (Sportschiene) spreads the force of a blow across the whole dental arch instead of letting it land on one front tooth, and it keeps your teeth from cutting through your lip or slamming into each other when the jaw is driven upwards. Dental associations in Germany and abroad recommend one for every sport with a realistic chance of contact with an elbow, a stick, a ball or the floor. What a mouthguard does not do is make you invulnerable: it will not reliably prevent a concussion, it will not stop every jaw fracture, and a guard that fits badly or lives in your kit bag protects nothing at all. The protection comes from fit and from actually wearing it.
What actually happens to a tooth in an impact
To judge whether a piece of plastic is worth the trouble, it helps to know what it is standing between. Dental trauma comes in a small number of recognisable patterns, and they differ enormously in what they cost you afterwards.
A chipped corner. The most common and the friendliest outcome. A fragment of enamel breaks off an upper front tooth; often it can be rebuilt the same day, sometimes with the original fragment if you bring it.
A fracture into the nerve. The break runs deeper and the pulp is exposed — recognisable by a pink or red dot in the middle of the fracture surface, and by sharp pain in cold air. This needs treating within hours, not days, and frequently leads to root canal treatment (Wurzelbehandlung).
A loosened or displaced tooth. The tooth is still there but wobbles, has been pushed inwards, or sits lower or higher than its neighbours. It has to be repositioned and splinted, and the nerve may still die months later.
A tooth knocked clean out (avulsion). The worst case in the short term, and not necessarily the end of the tooth — see below, because the sooner it is dealt with the better, and the first hour is the usual benchmark.
Soft tissue and jaw. Lip lacerations from the teeth on the inside, a bitten tongue, and at higher energies a fractured jaw. A guard reduces the first two considerably; the third is a different category.
The pattern that matters most for adults is the invisible one: a tooth that survives the impact, looks fine for two years and then darkens because the nerve quietly died. That is why any knock to a front tooth deserves a check even when nothing is broken.
What a mouthguard does — and what it does not
It distributes force. Instead of the full energy of an impact arriving at the biting edge of one incisor, it is spread over the arch and absorbed partly by the material. This is the core mechanism, and it is the reason a thicker, well-fitted guard outperforms a thin one.
It separates the jaws. A guard between the teeth stops upper and lower teeth colliding when the chin is hit from below — a frequent source of cracked molars in sport that nobody sees coming.
It shields the soft tissue. It covers the sharp edges that would otherwise cut through your lip, and it puts a cushion between the teeth and the inside of the cheek.
It protects dental work. Crowns, veneers, implants and bridges do not repair themselves, and their edges are more brittle than natural enamel.
Now the honest limits, because they are the part most articles skip. The evidence that mouthguards prevent concussion is not settled — a guard is not head protection, and no one should skip a helmet or change how they play because they are wearing one. A guard reduces but does not eliminate the risk of a jaw fracture at high energy. It does nothing for the tooth that was already loose from untreated gum disease. And no guard performs at all if it is too loose to stay put, so uncomfortable that you take it out at half-time, or still in the bag.
Where the protection actually comes from
Fit. That is very nearly the whole story. A guard that grips the upper teeth firmly stays in position at the moment of impact and transfers force the way it was designed to; one that shifts moves the load somewhere unplanned and can be spat out by the blow itself.
This is the practical difference between a shop-bought boil-and-bite guard and one made from a scan or impression of your own teeth in a dental laboratory (Zahnlabor). The ready-made version is better than nothing and thousands of people use one. But it is thick where it does not need to be, thin exactly over the front teeth where it does, and it has to be held in place by biting — which is why so many players end up talking through clenched teeth. A custom guard is measured to your arch, built to a chosen thickness in the zones that take the hits, and stays where it was put. The trade-offs are set out in Custom-made sports mouthguard or a standard model — which is better?.
If you want to see what making one actually involves, it is described on our Sports mouthguards – service page (EN).
One point on cost that people usually discover late: a sports mouthguard is always a private service in Germany. Statutory health insurance (gesetzliche Krankenversicherung, GKV) does not pay for one, whereas a night guard (Knirscherschiene) for diagnosed teeth grinding is a statutory benefit. Different device, different job, different rules.
The arithmetic nobody does beforehand
A front tooth lost at fifteen is not one treatment. It is a sequence that runs for decades, and this is the argument that convinces most parents in the chair.
A knocked-out permanent incisor in a teenager typically means: emergency care on the day, splinting, root canal treatment weeks later, then a temporary solution for years — because a dental implant (Implantat) is normally only placed once jaw growth is complete. Then the implant itself, and a crown on top. Then, over a lifetime, the crown replaced once or twice, because nothing in the mouth is permanent.
We do not publish a price for that path, and no honest practice can: it depends entirely on what happened. As general background — a market range in Germany, not our prices — an implant with its crown lies somewhere around 2,100–4,000 € all in. At our practice the surgical part, the implant itself, starts from 999 €, and everything else appears in a written plan before anything begins. Set that against the cost of a custom-made guard, which is a small fraction of it and lasts a season or more of a growing child, and the calculation stops being about money.
There is also a factor that has no price at all: the tooth you keep is your own, and nothing we build ever quite equals it.
If a tooth is knocked out anyway: the first hour
Print this, put it in the club first-aid kit, and tell the coach. German dental associations are unanimous on the essentials, and the difference between doing this right and doing it wrong is often the difference between keeping the tooth and not.
Find the tooth and pick it up by the crown. The white chewing part only. Never touch the root — the fine cells on its surface are what allow it to reattach.
Do not clean it. No scrubbing, no toothbrush, no disinfectant. If it is visibly dirty, rinse it briefly under cold running water or in saline, no longer than a few seconds.
Get it into the right liquid immediately. In order of preference: a tooth rescue box (Zahnrettungsbox) from a pharmacy — the first choice, and worth having in the kit bag of any contact-sport club; UHT milk (H-Milch); saline; or, if there is truly nothing else, cling film. Never water, and never a dry tissue or a paper napkin: both destroy the surface cells within minutes.
Go to a dentist the same hour, not the same week. The chances of a knocked-out tooth reattaching fall sharply with every passing minute out of the socket. Outside surgery hours, use the dental out-of-hours service (Notdienst).
A baby tooth is never put back. Reimplanting a knocked-out milk tooth can damage the permanent tooth developing behind it. Take the child to be seen anyway, since the socket and the neighbouring teeth still need checking.
What is harmless after a knock — and what needs an appointment
Situations that change the picture
Children with newly erupted front teeth. The permanent incisors arrive around the age of seven to eight and immediately become the most exposed teeth in the mouth, at exactly the age when children begin playing organised sport in a German club. Their roots are not yet fully formed, which changes both the injury and the treatment.
Braces and aligners. Fixed braces (feste Zahnspange) make a mouthguard more important, not less, because brackets turn a blow into lip lacerations. A guard has to be designed around them. Clear aligners are not mouthguards and offer no meaningful impact protection — take them out, wear the guard, put them back in afterwards.
Existing crowns, veneers or implants. Ceramic chips where enamel would only bruise. If you have invested in front-tooth work and you play sport, a guard protects the work as much as the tooth.
Adults returning to sport. The five-a-side league at 38 produces a surprising share of the front-tooth injuries we see. Reaction times change; the ball does not.
New to Germany, or unsure how the system works. Club sport here runs through a Verein, and what a club’s accident cover pays towards dental treatment varies — it is worth asking your club before you need to know. If explaining a dental injury in German feels like an obstacle, that is one less thing to worry about with us: see English-Speaking Dentist in NRW. We are in Wuppertal-Elberfeld and easily reached from Solingen, Remscheid and Velbert.
The injuries we treat rarely come from elite competition; they come from a Tuesday evening game, a training session, a friendly. Risk follows the situation — an elbow at an unexpected height — rather than the level you play at.
For most sports an upper guard is what is recommended, because the upper front teeth take the great majority of impacts. A lower guard is occasionally added where the sport involves heavy impact from below or an unusual bite, and that is decided case by case.
A custom guard, properly trimmed, allows normal breathing and reasonably clear speech within a few sessions. Bulky ready-made guards are the ones that force mouth-breathing and muffle calls, and that discomfort is the main reason people stop wearing them.
It has a shorter life than an adult’s, that is true — a growing mouth outgrows it. But the years when the teeth are changing are precisely the years of highest risk, and a guard that fits during that period is doing the most valuable work of its existence.
Frequently yes, when it reaches a dentist quickly and has been stored correctly. It is not a certainty, and a reimplanted tooth usually needs root canal treatment and monitoring for years afterwards. But the attempt is nearly always worth making, and the sooner the tooth is seen the better — the first hour is the usual benchmark, not a guarantee.
A mouthguard is not a talisman. It is a mechanical solution to a mechanical problem: it spreads impact force, keeps the jaws apart and covers the edges that cut. Within that job it works well, and dental associations recommend it for good reason. Outside that job — concussion, high-energy jaw fractures — it should not be relied on. The two things that actually determine whether it saves a tooth are how well it fits and whether it is in your mouth at the moment it is needed. Everything else is detail.
Zahnarztpraxis Tsypin · Wuppertal. This article was medically reviewed and is provided for information; it does not replace an examination. Updated August 2026.
