Both upper and lower night guards protect your teeth. The right choice mostly comes down to comfort, your bite, and any dental work you have.
By the FixUrSmile Dental Lab team · Updated September 2026
Yes. Either one puts a protective layer between your upper and lower teeth so grinding and clenching wear the guard instead of your enamel. According to Mayo Clinic, splints and mouth guards can be made to fit over either the upper or lower teeth.
| Upper night guard | Lower night guard | |
|---|---|---|
| Most common? | Yes, often the default | Less common |
| Feel | Can feel bulkier near the palate edge | Often feels less bulky; less gag reflex |
| Speech | May affect speech slightly | Often easier to talk in |
| Stability | Upper teeth often give good retention | Good, depending on your teeth |
| Good for | Most grinders | Strong gag reflex, some bite types, dental work on the upper teeth |
Most people only need one. Wearing two stacked guards is not typical. Some people keep a clear retainer on one arch and a night guard on the other, but ask your dentist or orthodontist first. See night guard vs. retainer.
Each custom night guard is made for one arch. You can choose upper or lower when you order a custom night guard: $297 per arch. Not sure? Upper is the most common choice; lower is a good option if an upper guard feels too bulky.
Related guides: night guard cost
Both protect your teeth. Upper guards are more common; lower guards can feel less bulky and are better for some bites and people with a strong gag reflex.
Yes. Lower night guards work the same way and are a good option for many people.
Usually no. One guard on either arch is enough for most people.
Many people find lower guards easier to talk in.
$297 per arch. Made in our US dental lab from impressions you take at home, with licensed dentist approval and our Custom Fit Guarantee.
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