Mewing With a Mouthguard: Why This Combination Actually Works
Share
If you've been mewing for any length of time, you've probably noticed something frustrating: the results are inconsistent. Some days you feel like your jaw is changing. Other days — or weeks — it feels like you've gone backwards. You keep practicing the technique, you keep the tongue up, and yet the progress feels maddeningly difficult to hold.
There's a specific mechanical reason for this. And once you understand it, the fix is obvious — and it will make everything you're already doing with mewing actually work.
What Mewing Is Actually Doing
Mewing works — at least partially — for the same reason a flat mouthguard works: it stretches the soft tissue surrounding the skull.
When the tongue pushes up against the palate, it applies upward and outward force on the soft tissue of the roof of the mouth and the surrounding structures. That stretch is real. It begins to improve the curve of spee — the natural upward arc of the teeth from front to back — and as it does, the soft tissue starts to expand. The skull begins to re-inflate, the cranial bones shift toward their correct positions, and the structural improvements that mewers are chasing start to happen.
The problem isn't that mewing doesn't work. The problem is that it can't maintain what it creates.
The Hamster Wheel Problem — Proven With a Tracking Splint
Here's the experiment that makes this undeniable.
A tracking splint is a flat lower dental splint drilled so that all the upper back teeth have even contact with it when you bite down — using occlusal paper that leaves ink marks. It lets you see exactly how your dental contacts change from one session to the next. It's a physical record of structural change (or regression) in real time.
When you mew, the dental contacts on the tracking splint change. The marks shift — showing that the occlusion is actually changing, which means the structure is actually changing. Mewing works.
But here's what happens next: if you don't wear any appliance to sleep that night, within a couple of days the contacts go back to exactly where they were before. The progress disappears. You need to mew again to recreate the same change, then lose it again the next time you sleep without support. Over and over.
That's the hamster wheel. You're making real progress every session and losing it every night. Net structural change: essentially zero.
Now here's what happens when you add a rubber mouthguard: the contacts that were missing after mewing are still missing the next morning. The progress holds. And if you keep mewing and keep wearing the guard, the tracking splint contacts keep shifting forward — which means you're always drilling the front of the splint down, which means you're building a curve of spee. Compounding progress instead of circular progress.
The mouthguard isn't replacing the mewing. It's locking in what the mewing created.
Why the Gains Regress Without a Guard
When you mew, you're improving the curve of spee. By definition, as that curve improves, a small posterior open bite starts to form — the back teeth begin to lose contact as the upper jaw lifts slightly. That open bite represents the structural progress.
Without a guard, when you sleep that night, the teeth close back into their habitual contact positions. The cusps find each other. The bite closes to its old geometry. The posterior open bite disappears. The curve of spee flattens back down. The structural gains from the session revert.
With a flat guard in, the back teeth can't close to their habitual positions — the guard sits between them. The open bite that mewing created is supported through the night. The soft tissue holds its new, slightly stretched position. Tomorrow's mewing session starts from the improved baseline, not from scratch.
This is why the combination produces consistent results when mewing alone doesn't. It's not about doing more — it's about holding what you've already done.
What This Means for Your Results
The practical implications of this are significant.
Mewing without a guard: Progress happens during sessions, reverts during sleep. Over months, very slow net improvement at best — and often the frustrating experience of plateau or inconsistency that sends people to Reddit threads asking why it's not working.
Guard without mewing: Structural decompression work happens nightly. Steady, compounding improvement over months without any additional active practice. This alone produces meaningful results for most people.
Mewing plus guard: Every mewing session compounds on top of the nightly gains instead of being erased by sleep. Fastest structural progress of any combination.
The people in the mewing community who are showing genuine before-and-after facial structure changes — not the camera angle tricks, but actual structural remodeling — are almost certainly using some type of oral appliance. The Mews themselves prescribe Myobrace to their patients, which follows the same two structural rules: adds vertical height, doesn't lock the occlusion. The appliance is doing the compounding work. The mewing is accelerating it.
The Two Rules Any Guard Needs to Follow
Not every mouthguard accomplishes what's needed here. For a guard to hold your mewing gains and build on them, it needs to satisfy two structural requirements:
1. Add meaningful vertical height. The guard needs to prevent the back teeth from closing to their habitual contact position. This is what supports the posterior open bite that mewing creates and prevents it from collapsing overnight.
2. Keep the occlusion unlocked. The biting surface must be flat — no cusps, no impressions, no registered bite position. As the structure changes and the jaw migrates toward its correct position, the bite contacts change. A flat surface accommodates that movement; an indexed surface fights it.
A boil-and-bite soft guard fails both requirements: it conforms to the existing bite and adds minimal height. A flat, pre-formed hard rubber guard satisfies both.
The Bigger Picture
Here's what this combination reveals about how the whole process works.
You don't change your facial structure without changing your occlusion. Period. Every structural change — whether from mewing, stretching, bodywork, or anything else — has to be reflected in a change in how the teeth meet. And every change in how the teeth meet has to be supported overnight or it reverts.
This is why mewing on its own is a hamster wheel for most people. And it's why adding a flat guard to sleep is the single highest-leverage thing you can do to make everything else you're already doing actually stick.
The mewing community is sitting on millions of hours of effort that could be compounding — and isn't, because of one missing piece. That piece is this simple. Wear a flat guard to sleep.
See the RevivOne flat occlusal guard at getreviv.com
RevivOne is an occlusal guard designed to help reduce bruxism (teeth grinding) and jaw tension during sleep. Individual results vary. The observations and community patterns described in this article reflect the founder's personal experience and reports from community members, and are not intended as medical advice.