Dental Mouthguards: types and when you need one

"Doctor, can't I just buy a mouthguard at the pharmacy and skip the hassle?" I hear this question several times a month. Sounds like reasonable savings, but it's actually the worst idea.

I treat the way I'd want to be treated. That means explaining why one guard costs 20 euros at the pharmacy and another 350-700 euros in the office. Because the difference between them is the difference between actually helping you and possibly making things worse.

A dental splint or mouthguard (in German Zahnschiene or Aufbissschiene) is a removable device made of transparent plastic that fits over your teeth. Sounds simple, but there are many types, each for a specific job. Today we're going through all the different guards and when you actually need each one.

5 types of dental guards and what each one does

1. Night guard for bruxism (Aufbissschiene)

The most commonly prescribed guard. Worn at night to protect your teeth from grinding and clenching. About 20-30% of adults have bruxism, and often patients don't know they have it until they see characteristic wear patterns on their teeth or wake up with jaw pain.

Custom-made in a dental lab. The dentist takes impressions, then technicians build a model and make the guard from thick plastic (usually 1-3 mm). The finished guard fits firmly, doesn't fall out at night, doesn't irritate the gums.

Covered by GKV when bruxism is diagnosed. Documented through a Heil- und Kostenplan.

2. Sports mouthguard (Sportmundschutz)

Protects teeth, gums, and lips during contact sports: boxing, MMA, ice hockey, rugby, basketball. For kids in Germany this is especially important if they play soccer competitively. A front tooth trauma at age 10-15 causes lifelong problems.

Pharmacy "boil-and-bite" sports mouthguards are protection simulation. They fit badly, fall out easily, restrict breathing. A custom mouthguard from your dentist costs 80-200 euros and lasts several seasons. Not a GKV benefit, but a worthwhile investment.

3. Teeth whitening trays (Bleaching-Schiene)

This is where patients get most confused. These aren't therapeutic guards, they're carriers for hydrogen peroxide gel for at-home whitening.

Custom whitening trays from your dentist fit snugly, the gel doesn't leak onto the gums, the concentration is higher, the effect stronger. Pharmacy trays with pre-loaded gel give weak results and a risk of chemical burns to the gums.

At-home whitening cycle is 10-14 days. First days with low peroxide concentration (10%), later you can move to 15-22%. Before whitening, professional cleaning is essential. After whitening, sensitivity is possible for 1-3 days, and potassium toothpaste helps.

Price: trays plus gel in Hamburg run 400-700 euros. GKV doesn't cover this, it's cosmetic.

4. Clear aligners

Transparent trays for straightening teeth. An alternative to braces, especially popular with adults who don't want metal brackets.

How it works: a series of 20-40 trays, each worn 1-2 weeks. Each new one differs slightly from the previous and gradually shifts your teeth to the desired position. You need to wear them 22 hours a day, removing only for eating and brushing.

Top systems in Germany: Invisalign, ClearCorrect, SmileDirect (online). The first two go through a dentist, the last goes direct-to-consumer (I personally don't recommend it because without proper diagnosis the result is unpredictable).

Price in Hamburg: 3,500-6,000 euros for the full course, GKV doesn't cover it (private service).

5. Retainer

Worn after orthodontic treatment (braces or aligners) so your teeth don't shift back to their original position. First 6-12 months 24 hours a day, then only at night, for years.

A lot of patients stop wearing their retainer after 2-3 years and then wonder why their teeth start drifting. A retainer isn't a "fashion item," it's a lifelong necessity after orthodontic work.

Why a pharmacy guard is worse than one from your dentist

I get this question constantly. Let me break it down.

Fit accuracy. A pharmacy "boil-and-bite" guard is shaped by your teeth in hot water. It captures the shape roughly. A custom guard is made from a precise impression, with every bump and groove accounted for.

Material. Pharmacy guards use cheap plastic that yellows quickly and absorbs bacteria. Custom guards use medical-grade PETG or polyurethane, hypoallergenic and stable.

Thickness. Pharmacy guards are often either too thick (preventing you from closing your mouth) or too thin (tearing quickly). A custom guard is exactly matched to your clinical situation.

Bite. The most important thing. A therapeutic guard has to distribute your bite forces correctly. A pharmacy guard can't do that. Wearing the wrong guard can actually worsen TMJ problems (temporomandibular joint dysfunction) and cause headaches.

Bottom line: a pharmacy guard is 20 euros but doesn't treat the problem, it often just masks it. A custom guard is 350-700 euros, treats the problem, and lasts for years.

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