If you repeatedly wake with a sore, swollen or bitten inner cheek, choosing a mouth guard is not quite the same as choosing one for teeth grinding.
Editor’s Note
This article was updated on September 3, 2026 to clarify the difference between traditional night guards and guards designed for tongue and cheek protection, update current Sentinel product specifications, and remove overly broad claims about cheek-biting prevention and healing.
A traditional night guard is usually designed to protect the teeth and dental work from the effects of clenching or grinding. Cheek biting creates a different problem: soft tissue can become caught between the upper and lower teeth.
That distinction matters when deciding what type of mouth guard may provide the most useful protection.
What Kind of Mouth Guard Is Best for Cheek Biting?
The best design depends on what is actually causing the injury.
If your primary problem is heavy grinding or clenching and tooth wear, a traditional custom night guard may be the more appropriate choice.
If your primary problem is the inside of your cheek or your tongue repeatedly becoming caught between your teeth, the guard needs to address soft-tissue contact rather than tooth wear alone.
This is why Sentinel's Tongue & Cheek Biting Relief Guards are designed as a matched set: one custom appliance covers the upper teeth and another covers the lower teeth.
Why a Regular One-Arch Night Guard May Not Fully Protect the Cheek
Most conventional night guards cover either the upper teeth or the lower teeth.
That makes sense when the primary goal is protecting tooth surfaces from the effects of bruxism.
Cheek biting is different.
Imagine wearing a guard over the upper teeth. Those teeth are now covered by the appliance, but the lower teeth remain exposed.
If the cheek moves between the arches during jaw closure or side-to-side movement, the uncovered teeth may still contact the tissue.
A one-arch night guard may therefore provide some protection, but it does not cover the biting surfaces on both arches.
Why Upper and Lower Coverage Matters
The purpose of a tongue-and-cheek biting guard is not to prevent your jaw from moving.
Instead, it changes what vulnerable soft tissue encounters when the jaw does move.
When both arches are covered, the tongue and inner cheeks encounter smooth guard surfaces rather than exposed upper or lower biting edges.
That is a fundamentally different design goal from a conventional grinding guard.
| Guard type | Typical coverage | Primary purpose | Cheek-biting consideration |
|---|---|---|---|
| Traditional custom night guard | Upper or lower arch | Protect teeth and dental work from the effects of grinding or clenching | The opposing teeth remain uncovered |
| OTC / boil-and-bite guard | Usually one arch | General-purpose dental protection | Fit, thickness and coverage vary by product |
| Custom upper-and-lower tongue & cheek guard set | Both arches | Protect tongue and inner cheeks from direct dental contact | Covers biting surfaces on both upper and lower teeth |
Custom vs. Store-Bought Guards for Cheek Biting
Store-bought mouth guards can serve useful purposes, but their shape, thickness, materials and fit can vary substantially.
Many are designed for sports or general nighttime grinding rather than specifically for recurring soft-tissue injury.
A custom appliance is fabricated from the individual's dental anatomy, allowing the guard to follow the shape of the teeth more closely.
For cheek biting, however, the important question is not simply whether a guard is “custom” or “store bought.” It is whether the design actually covers the dental surfaces that are catching the tissue.
What About Wearing Two Regular Night Guards?
Wearing an upper night guard and a lower night guard together is not the same as using an upper-and-lower set that was specifically designed to function together for soft-tissue protection.
Traditional night guards are designed primarily around protection from grinding or clenching. Their thickness, materials and intended interaction with the opposing teeth can differ substantially.
Sentinel's Tongue & Cheek Biting Guards are intentionally designed as a coordinated upper-and-lower set for people whose primary concern is recurring tongue or cheek injury.
Sentinel Tongue & Cheek Biting Relief Guards
Sentinel developed the Tongue & Cheek Biting Relief Guards around a very specific problem we repeatedly hear from customers:
“My tongue or cheek keeps getting caught between my teeth while I sleep.”
The set includes one custom upper guard and one custom lower guard so the biting surfaces of both dental arches are covered.
- Custom-made from your dental anatomy
- Matched upper-and-lower guard set
- Thin 1.0 mm soft EVA construction
- Smooth, flexible protective surfaces over both dental arches
- Designed specifically for recurring tongue and cheek biting during sleep
- Available using qualifying dental impressions or compatible digital dental scans
Why Use Soft 1.0 mm EVA for Tongue and Cheek Protection?
Tongue and cheek protection calls for a different design approach than a heavy grinding guard.
Sentinel uses thin 1.0 mm EVA for these guards to create a soft, flexible layer over the natural biting surfaces of the teeth.
The material creates a smoother interface between the teeth and the surrounding soft tissues without turning the appliance into a thick grinding guard.
Because the upper and lower appliances are intended to be worn together, keeping the profile thin is particularly important for this product design.
Who Are Tongue & Cheek Guards Best Suited For?
This type of guard makes the most sense when soft-tissue injury is the primary problem.
That may include people who:
- repeatedly bite the inside of the cheek while sleeping;
- repeatedly bite the tongue during sleep;
- wake with recurring cheek or tongue sores caused by contact with the teeth;
- describe their cheek or tongue as becoming “caught” between the teeth;
- or want a custom-fitted option designed specifically around soft-tissue protection.
When Is a Traditional Night Guard the Better Choice?
Sentinel's Tongue & Cheek Biting Guards solve a different problem from Sentinel's traditional custom night guards.
They are not the primary recommendation when your main concern is:
- heavy teeth grinding;
- heavy nighttime clenching;
- worn or fractured teeth;
- damage to crowns, bonding or other dental work;
- or protecting the teeth from bruxism.
In those situations, a traditional custom night guard designed for tooth protection is generally the better starting point.
Can a Mouth Guard Stop Cheek Biting Completely?
A mouth guard can change the mechanical interaction between the teeth and vulnerable soft tissue, but it should not be presented as a guaranteed cure for every form of cheek biting.
Sentinel's upper-and-lower design covers the biting surfaces of both arches with soft EVA, helping reduce direct contact between exposed teeth and the tongue or inner cheeks.
The guards do not necessarily stop jaw movement, clenching, grinding or a behavioral cheek-chewing habit.
That distinction is important because cheek biting can happen for very different reasons.
If you deliberately or unconsciously chew the inside of your cheek while awake, behavioral strategies may still be important even when a guard provides physical protection.
Read: How to Stop Cheek Biting: Why It Happens and What You Can Do .
What If You Bite Your Tongue Too?
Cheek and tongue biting can overlap because both types of soft tissue can move between the upper and lower dental arches.
If your injuries primarily occur while sleeping, our guide to why you may bite your tongue in your sleep explains possible causes, warning signs and when mechanical protection may help.
What If the Cheek Is Already Injured?
Preventing repeated contact may give irritated tissue an opportunity to recover, but this article is intentionally focused on choosing the right guard rather than treating an oral wound.
For care of an existing bite, see: How to Care for Tongue and Cheek Biting Injuries .
Frequently Asked Questions
What is the best mouth guard for cheek biting?
When the primary problem is soft tissue becoming caught between the upper and lower teeth, a custom design that covers both dental arches addresses the problem more directly than a conventional one-arch grinding guard.
Can I use a regular night guard for cheek biting?
A regular night guard may cover the biting surfaces of one dental arch, but the teeth on the opposing arch remain exposed. That may leave an opportunity for the cheek to continue contacting uncovered teeth.
Are soft guards better for cheek biting?
Material is only part of the equation. For Sentinel's Tongue & Cheek Biting Relief Guards, thin 1.0 mm soft EVA is paired with upper-and-lower coverage so the appliance is designed specifically around soft-tissue protection.
Do I really need both an upper and lower guard?
Sentinel's Tongue & Cheek Biting Guards are specifically designed to function as a matched upper-and-lower set. Both appliances are worn together to provide the intended coverage.
Can I wear just one Sentinel Tongue & Cheek Guard?
The product is intended to be worn as a complete set. Wearing only one leaves the teeth on the opposing arch uncovered and does not provide the protection the two-guard design is intended to create.
Will these guards stop me from grinding?
They are not designed to stop bruxism. Although they place material over the teeth, people whose primary concern is grinding, clenching or tooth wear should generally consider a traditional custom night guard instead.
Can these guards help with tongue biting too?
Yes. The upper-and-lower design is intended to help protect both the tongue and inner cheeks from direct contact with exposed biting surfaces.
Can I use a digital dental scan instead of taking impressions?
Sentinel can work with compatible digital dental scans for qualifying orders. Because this product is made as an upper-and-lower set, usable records of both dental arches are required.
The Bottom Line
The best mouth guard for cheek biting is not necessarily the thickest or strongest night guard.
It is the design that matches the problem.
If your primary concern is tooth wear from grinding or clenching, choose a guard designed for tooth protection.
If your primary concern is your cheek or tongue repeatedly becoming caught between your teeth during sleep, covering both dental arches addresses a different mechanical problem.
That's why Sentinel's Tongue & Cheek Biting Relief Guards are made as a matched upper-and-lower set using thin 1.0 mm soft EVA.