A bruxism guard protects your teeth; it does not stop grinding. This mechanical role should guide your choice. This guide is for you if you clench or grind at night and are considering a pharmacy guard, one supplied by a dental practice or a custom guard ordered online. It covers study findings, risks to understand before buying and the criteria that matter.
What is a bruxism guard for?
What it protects
A guard sits between the upper and lower teeth. During clenching or grinding, it separates tooth surfaces. Its role is mechanical. This alone does not quantify a clinical benefit for wear.
What it does not treat
It does not stop bruxism. Sleep bruxism affects about 1–15% of adults depending on the study and is associated with alcohol, caffeine, tobacco and some medicines [3]. In otherwise healthy people, experts now describe it as a behaviour rather than a disease [6]. Studies do not demonstrate that a guard eliminates this behaviour.
| What can be expected | What cannot be promised |
|---|---|
| Preventing direct tooth-to-tooth contact at night | Eliminating grinding |
| Protecting crowns, veneers and restorations from direct contact | Guaranteed relief of jaw pain or headaches |
| A simple, removable appliance without an irreversible procedure | Improving sleep |
The next question follows logically: how does this protection perform when measured?
Is it effective? What studies say
Studies are more cautious than advertisements.
- For bruxism itself: the Cochrane review concludes that evidence is insufficient to establish that a guard treats sleep bruxism, with a possible benefit for tooth wear [1]. A trial using sleep recording found no average effect on episode counts: they decreased in some wearers and increased in others [4].
- For pain: a large British synthesis of 52 trials found no evidence that splints reduce pain from jaw joint disorders [2].
- For wear: the same synthesis notes that no study measured tooth wear in people with bruxism wearing a splint [2]. Protection makes mechanical sense but is not quantified.
- Among management approaches: a review of 41 reviews nevertheless identifies occlusal appliances as the only approach judged effective, with others remaining inconclusive [3].
A guard is therefore a reasonable protective option, not a treatment that stops bruxism. Like any appliance worn in the mouth, it also carries risks.
Risks and side effects: what to know beforehand
Poor fit: discomfort, pain and bite changes
A guard that does not fit your teeth applies uneven pressure. If you wake with pain, a sensitive tooth or the impression that your teeth no longer meet as before, stop wearing it and seek dental advice. Fit should be checked by the professional responsible for your care.
Soft guards: chewing on the appliance
Observed muscle responses differ between studies. In a small older trial, a hard splint reduced night-time muscle activity in 8 of 10 people, whereas a soft splint increased it in 5 of 10 [5]. A 2024 review found no change in muscle activity or bite force with these splints, with low to very low certainty: Soft and hard splints, Ferreira et al., 2024. Results are therefore conflicting, but feeling that you are biting into your guard is a sign to take seriously.
Materials
Always ask what the guard is made of and where it is manufactured. A reliable seller should be able to answer in writing.
Situations requiring dental advice first
- Jaw pain, locking or painful clicking.
- Loose teeth, untreated decay or an ongoing gum problem.
- Significant snoring or breathing pauses during sleep.
- Children or adolescents: teeth and jaws are still changing.
Examination then helps determine whether a guard is indicated and how to organise follow-up.
Three ways to obtain a bruxism guard
| Pharmacy (heat-mouldable) | Dental practice | Custom from a home impression | |
|---|---|---|---|
| Process | Moulding according to the manufacturer's instructions | Impression or scan in practice, laboratory manufacture | Impression kit received at home, laboratory manufacture |
| Fit | Depends on the model and moulding | Fitted to your teeth and checked by the practitioner | Fitted to your teeth, dependent on impression quality |
| Follow-up | Check the specific offer | Examination and adjustment in the mouth | An online purchase alone does not include an oral examination |
| Appointments | Check the specific offer | One or more | Check the specific offer |
An important limitation: studies have not demonstrated that a custom guard protects better than a prefabricated one [2]. Custom means manufactured from an impression of your teeth. This alone does not guarantee greater comfort or superior effectiveness.
The MyoProtect custom bruxism guard follows the third route: you take your impression at home, and the guard is manufactured in a laboratory from that impression.
Soft, hard or dual-layer?
- Soft: soft material. Tolerance and wear depend on the model and use.
- Hard: hard material. This does not guarantee greater effectiveness.
- Dual-layer: a soft inner layer against the teeth and a hard outer friction surface. No study specific to this guard type was identified in our reference file as of 1 October 2026: the construction does not justify claims of greater comfort, durability or effectiveness without model-specific data.
Upper or lower?
A bruxism guard is worn on one arch. Both positions exist, and available studies do not establish that one protects better. Arch and model selection should account for your dental circumstances. If you have crowns, implants or missing teeth, ask your dentist which arch to cover.
How long should it be worn, and how long does it last?
The wearing schedule is agreed with the professional and follows the instructions. Lifespan varies by device and use: no reliable figure applies to everyone. Have it checked if perforated, cracked, deformed or no longer staying in place. Rapid wear warrants a review of the device and your dental situation.
How much does it cost?
Prices vary considerably by route: request the model's price and a practice quote specifying included services. MyoProtect costs €90. For a guard supplied by a practice, request a quote and ask your supplementary health insurer about coverage.
Common questions
Is a dental guard effective for bruxism?
It effectively separates the teeth. It does not stop bruxism: studies do not show a lasting reduction in episode counts [1] [4].
What is the best bruxism guard?
Choose a model for your situation and wear it as instructed. Studies do not identify a superior type for everyone.
Can a guard move teeth?
A well-fitted guard covering the entire arch is not intended to move teeth. If the way your mouth closes seems to change, stop wearing it and seek advice.
Should you see a dentist first?
Yes if you have pain, jaw locking, loose teeth or uncertainty about the cause of wear. Examination and discussion may lead to a referral to investigate a sleep disorder; they cannot exclude one on their own.
Further reading
If you are looking for a guard made from impressions of your teeth without several appointments, see MyoProtect. To compare other dental appliance categories—aligners, retainers and snoring appliances—read our dental appliance guide.
Explore your choice further
- Understand bruxism and its consequences
- Compare soft, hard and dual-layer guards
- Check price and reimbursement
- Prepare for a home impression
- Care for your guard
References
- Macedo CR et al. Occlusal splints for treating sleep bruxism. Cochrane Database of Systematic Reviews, 2007. PubMed 17943862
- Riley P et al. Oral splints for patients with temporomandibular disorders or bruxism. Health Technology Assessment, 2020. PubMed 32065109
- Melo G et al. Bruxism: an umbrella review of systematic reviews. Journal of Oral Rehabilitation, 2019. PubMed 30993738
- van der Zaag J et al. Journal of Orofacial Pain, 2005. PubMed 15895838
- Okeson JP. Journal of the American Dental Association, 1987. PubMed 3475357
- Lobbezoo F et al. International consensus on the assessment of bruxism. Journal of Oral Rehabilitation, 2018. PubMed 29926505
This article provides general information. It does not replace examination by a dentist.