The TL;DR version
- The best biofeedback device is the one you will wear consistently.
- Zerene takes the place of the night guard you already wear, measures bite force right at your teeth, and protects them while you train.
- Up to 90% reduction in grinding, a real coach, and a money-back guarantee if your data doesn’t improve.
You’ve done the research. You know a night guard protects your teeth while the grinding continues behind the scenes. You know biofeedback works, and you’re ready to try something that can help you learn to stop your grinding habit.
You’ve got options: headbands, smart mouthguards, and more. But which one is the right choice for you?
This guide covers what to look for in a biofeedback device for bruxism, how the main options compare, and what happens when you choose Zerene.
100% money-back guarantee · HSA/FSA eligible · No prescription or dentist visit · Free shipping
A quick refresher: how biofeedback stops grinding
Sleep bruxism (clenching or grinding the teeth) happens when your jaw muscles fire on their own while you sleep. You can’t stop yourself from doing it because, well, you’re asleep!
Biofeedback gives your sleeping brain a signal it can learn from. A sensor notices the moment you start to clench and sends a gentle cue. Your jaw releases in response, all while you’re asleep. Repeat that night after night, and your brain starts to anticipate the cue and relax on its own.
1. Detect
The sensor feels bite pressure the moment you clench.
2. Cue
A gentle vibration travels into your guard.
3. Release
Your jaw relaxes without waking you.
4. Retrain
Night after night, your brain learns the new habit.
Published studies on vibration-based oral appliances have found fewer and shorter grinding episodes while people use them. The research is still young and most studies are small, but the results consistently point the same way. Read more about the science →
If you’re here, you already know biofeedback can work. The real question is which device will work for you.
What to look for in a biofeedback device for bruxism
Biofeedback works best when there’s enough consistency to change your existing habits, so the best device is the one you’ll actually keep using. Here are the top considerations to keep in mind:
It fits the routine you already have
If you grind, there’s a good chance a night guard already lives on your nightstand. Putting it in is as automatic as brushing your teeth.
Zerene is a custom mouthguard, so it simply takes the place of the one you wear now. You get the benefits of a smart mouthguard with almost no extra effort. Other options may add a second device and a new routine to build, on top of the guard you may still need for your teeth.
Then comes the part no regular night guard offers: an end point. Once your jaw has learned to relax, Zerene’s Maintenance Mode means you can opt to only wear it during stressful stretches or for a check-in. Keep doing what you do every night, until you don’t have to.
It measures where the grinding happens
Headbands and earbuds pick up secondary signals, like muscle tension, scalp activity, or pressure changes in the ear canal. Those signals are real, but they infer clenching from a distance.
Zerene measures bite force at the source: your teeth. Every clench is recorded and graded weak, medium, or hard, so the cue fires when you actually bite down. That means more accurate data, which helps make your Zerene training more effective.
It protects your teeth while it trains
Retraining a habit takes time. Your enamel can’t take a break while you wait.
Zerene’s lab-made mouthguard protects your teeth from the first night, while the training works on the habit. A headband or earbuds leave your teeth exposed during that time unless you wear a separate guard too.
It’s comfortable enough to wear every night
Zerene’s guard is made from an impression of your own teeth, using a kit you complete at home in 10 to 15 minutes. It’s thin, soft, and flexible, which most people find more comfortable than the rigid guards they’ve tried before. No dentist appointment needed.
The Moon Module that sits just outside your mouth weighs about 10 grams, roughly two nickels. Most people stop noticing it within a few nights.
The cue won’t wake you, or your partner
Zerene uses a gentle vibration you feel in the guard. It makes far less noise than devices that beep, and far less than grinding itself, a sound many grinders and their bedmates find alarming.
Most people barely notice it. One user remembered feeling it 4 or 5 times in her first week, while her data showed the vibration had interrupted her grinding hundreds of times.
You can see your progress
Every morning, the Zerene app gives you a Z-Score: one number that combines how often and how hard you clenched. Think of it as your nightly report card. Lower is better. You can watch it drop, along with a breakdown of your bite strength, so you know it’s working even before you feel the difference.
A real person has your back
Algorithms can show you numbers. Your Zerene coach is a real person, not AI, who reviews your overnight data every day, adjusts your sensitivity settings as you improve, and helps you push through if progress stalls.
It’s worth what you pay
Look at what’s included. The custom lab-made guard alone is the kind dentists charge $300 to $800 for. Zerene adds the biofeedback training, the data, the app, and a human coach on top of that.
Then think long term. A regular night guard means wearing one every night for the rest of your life, replacing it as it wears out, and still paying for the damage grinding does to your teeth. Zerene is built to get you to the point where you don’t need it every night. Even if you choose to wear your mouthguard long term, reduced grinding means you’ll wear it out much more slowly and save money over time.
And think about what you get back: mornings without headaches, a jaw that doesn’t ache, sleep that actually feels restful. Zerene is $349.99, and it’s HSA/FSA reimbursement eligible, so you can pay with pre-tax dollars. If you have FSA funds that expire at the end of the year, this is a good way to use them.
Zerene vs. headbands, earbuds, and night guards
It’s good news that more biofeedback devices are showing up. It means more people are realizing that protecting your teeth is only half the job, and that you have more options to help you. Here’s how the options compare on the points above.
| Zerene | Biofeedback headband | Biofeedback earbuds | Custom night guard | Drugstore night guard | |
|---|---|---|---|---|---|
| Retrains the grinding habit |  |
 |
|
 |
|
| Protects your teeth | |
|
|
|
|
| Measures at the teeth | |
Muscle or scalp signals |
Ear canal signals |
No tracking |
No tracking |
| Fits your current night guard routine |
Replaces your guard |
Adds a device |
Adds a device |
|
|
| Custom fit |
At-home impression |
One size |
One size |
Dentist visit |
|
| Coaching from a real person | |
App only |
App only |
|
|
| Path to not wearing it every night |
Maintenance Mode |
Varies | Varies | |
|
| Typical price | $349.99 to start | $200 to $400+ | $200 to $400+ | $300 to $800 | $10 to $50 |
On a phone? Swipe the table sideways to see every option.
Only one option on this list trains your jaw and protects your teeth while it does.
100% money-back guarantee · HSA/FSA eligible · No prescription or dentist visit · Free shipping
How Zerene works, from order to results
Your plan starts the day you order. Here’s what happens next.
Order online
No prescription, no dentist appointment.
Get your impression kit
It ships within 2 to 3 business days, with everything you need inside.
Make your impression at home
It takes 10 to 15 minutes with step-by-step instructions and a video guide. Mail it back with the prepaid label.
Receive your custom guard
Our lab makes your mouthguard to the exact shape of your teeth and ships it in about 2 weeks. You can keep wearing your current guard until it arrives.
Study Mode (first 3 to 5 nights)
Wear Zerene with the feedback off. The app maps your baseline: how often you clench, how hard, and when. Most people are surprised by what they see.
Training Mode
The gentle vibration turns on. Your coach walks you through your data and adjusts your settings as you improve.
Maintenance Mode
Once your jaw has learned to rest, you only wear Zerene when you need a tune-up.
Study
Zerene maps your baseline with feedback off
Train
Gentle biofeedback retrains your jaw
Maintain
Wear it only when you need a tune-up
See the full getting-started guide →
What results to expect, and when
Up to 90%
reduction in grinding
2 weeks
when many notice a difference
4.9/5
from 22 reviews
200,000+
bites interrupted
Zerene users can see up to a 90% reduction in grinding. Many notice a difference within 2 weeks of training, and some feel fewer morning headaches and less jaw soreness that quickly as well. For others, feeling the results takes longer. In either case, we are with you every step of the way.
Everyone’s timeline is a little different. Full benefits can take a few months, and progress isn’t always a straight line. That’s why your Z-Score tracks every night from the start. You’ll often see the improvement in your data before you feel it.
Case study
97% less grinding in about 23 nights
For one Zerene user, a super busy and stressed professional, grinding dropped by more than 97% within about 23 nights. “I am excited that at this point the biting and clenching is pretty much gone,” she said.
Results that make life better
Zerene is rated 4.9 out of 5 stars across 22 reviews. Here’s what users say about the things people worry about most.
On having something outside your mouth
“I was intrigued, but honestly a little put off by the idea of having something sticking out of my mouth all night... It took me exactly one night to be completely accustomed to the tube.”
Leah
On sleep
“I was very pleasantly surprised at how little the device/training disrupted my sleep.”
Jill
On results
“My bruxism has improved by 93% and I can open my mouth wider than I’ve been able to in over 20 years! The coaches are truly excellent and are helping me build a plan to stop using a mouthguard completely.”
Heidi
On value
“I’ve tried multiple headache pain meds, different types of mouth guards (hard and soft). Nothing has worked as good as Zerene... It’s worth every penny!”
Julia
On value
“I paid more for a custom night guard several years ago, so it’s a great value.”
Janet
Built with clinicians
Zerene was designed by Arash Sabet, a biomedical engineer who was diagnosed with sleep bruxism and wasn’t willing to accept “wear a night guard every night for the rest of your life” as the only answer. It was developed with dental and sleep medicine professionals and is endorsed by Dr. Scott Parker, DDS.
“Even though the device sticks out of the mouth, it was barely noticeable while I was awake and completely unnoticeable once I fell asleep.”
Dr. Scott Parker, DDS, Dentist & Educator
Is Zerene right for you?
Zerene works best if you:
- ✓Grind or clench your teeth in your sleep
- ✓Can comfortably wear a mouthguard
- ✓Sleep on your side or back
- ✓Can make a dental impression at home
Check with your dentist first if you have:
- !Loose or cracked teeth that a dentist hasn’t looked at yet
- !Tooth pain from cavities or dental work that needs attention
- !Loose crowns or bridges
- !A permanent retainer
If you use a CPAP, Zerene needs about 2 inches of clearance where it comes out of your mouth. Many users make it work, and our team is happy to talk through your setup. Zerene isn’t ideal for stomach sleepers.
Frequently asked questions
What if Zerene doesn’t work for me?
If your grinding doesn’t go down, you get your money back, and your own data is the judge. Follow the program (complete your impression kit, finish Study Mode, and train for at least 9 nights in a row with your coach’s guidance), and if your clenching hasn’t improved, request a refund within 45 days of receiving Zerene. See the full guarantee terms →
Do I need a dentist or a prescription?
No. You make your impression at home with the included kit, and no prescription is required.
Can I use my HSA or FSA?
Yes. Zerene is HSA/FSA reimbursement eligible. Some plans ask for a Letter of Medical Necessity, which your dentist or doctor can provide. Learn more about HSA/FSA →
Will the vibration wake my partner?
It shouldn’t. The vibration is gentle and you feel it in the guard. It makes far less noise than devices that beep, and far less than grinding.
Is it safe to have electronics in my mouth?
There aren’t any. The electronics sit in the Moon Module outside your mouth, and the cue is a gentle vibration with no electrical stimulation.
Why choose a mouthguard over a headband?
Zerene measures bite force at your teeth, protects your teeth while you train, and takes the place of the night guard you already wear. A headband reads indirect signals, leaves your teeth unprotected, and adds a second device to your routine.
How long until I can start?
Your impression kit ships within 2 to 3 business days, and your custom guard arrives about 2 weeks after you send back your impression.
Ready to stop grinding?
You already know biofeedback can retrain your jaw. Zerene makes it easy to stick with: it replaces the guard you already wear, measures right at your teeth, protects them while you train, and gives you a real coach and a clear path to not needing it every night.
100% money-back guarantee · HSA/FSA eligible · No prescription or dentist visit · Free shipping
