Sizing Guide: Choosing the Right Reviv for Your Mouth
Share
Getting the size right matters. A guard that's too large slips or causes discomfort. One that's too small doesn't provide adequate coverage or separation.
This guide walks through how to choose the right Reviv size for your jaw width, arch shape, and use case.
1. Why Sizing Isn't One-Size-Fits-All
Most off-the-shelf guards assume everyone has the same jaw width and dental arch shape. They don't.
Factors that affect which size works best:
- Dental arch width
- Facial structure and jaw shape
- Whether you're using it primarily for night or day wear
- Whether smaller guards tend to slip or feel crowded
A correctly sized guard stays in place, feels comfortable, and doesn't create pressure points on teeth or gums.
2. Small Fit: For Narrower Arches
Consider Reviv One Small if:
- Your mouth feels crowded easily
- Standard guards feel too wide or create cheek pressure
- Smaller dental arch width overall
Less bulk is more comfortable for narrower arches — and comfort drives consistent use.
3. Medium Fit: The Starting Point for Most Users
Medium is the right starting point for many first-time users.
Good for:
- Average dental arch width
- First-time users unsure of their size
- Both day and night wear
Start here unless you have a clearly narrow or wide jaw.
4. Large Fit: When to Size Up
Consider a large guard if:
- You have wider molars or a broader dental arch
- Smaller guards pop out or feel like they don't cover adequately
- You prefer more vertical separation between teeth
Reviv Two Large works well for daytime use where durability and firmness matter more.
5. What If You're Between Sizes?
When in doubt, size up.
A slightly larger guard is easier to manage than one that's too small — and can be refitted more precisely. A guard that's too small provides inadequate coverage and is more likely to slip.
6. General Size Trends
These are general tendencies, not rules — jaw structure varies regardless of gender:
- Many users with smaller jaw widths find Medium or Small more comfortable
- Users with wider arches or broader jaw structures often do better with Large
- Heavier grinders frequently prefer Reviv Two in Medium or Large for durability
Use the measurement guide on the product page for the most accurate sizing.
7. Sizing for Younger Users
Reviv is designed for adults. For users under 18, consult a dentist or pediatric dental professional before use — jaw development is ongoing and professional guidance matters for younger users.
8. Day vs Night Use: Does Size Change?
Preferences can differ between night and day use:
Night use:
- Some users tolerate slightly more bulk during sleep
- Comfort over 6–8 hours is the primary criteria
Day use:
- Slimmer profile tends to be preferred for speech and comfort during activity
- Reviv Two in Medium or Large works well for daytime use
9. Signs Your Guard Is the Wrong Size
Watch for:
- Consistent slipping during sleep despite correct fitting
- Pressure points on specific teeth that don't resolve after the first week
- Morning jaw tension that worsens rather than improving with consistent use
- Persistent discomfort that makes consistent nightly use difficult
If the guard isn't comfortable enough to wear consistently, reassess sizing before giving up on the product.
10. Arch Shape and What Tends to Fit
- Narrow arches → Reviv One Small
- Square or wider jaws → Reviv Two Medium or Large
- Significant overbite or underbite → Start with the softer Reviv One to allow adaptation before moving to firmer
- Asymmetry → Start with softer material, assess fit, then consider firmer once comfortable
11. Using Multiple Sizes
Some users find it useful to have both:
- Reviv One for overnight use (softer feel often preferred for sleep)
- Reviv Two for daytime use (firmer, better for speech and extended daytime wear)
12. When to Refit or Reassess Size
Reassess fit if:
- The guard feels noticeably looser than when new
- You've had significant dental work since the initial fit
- Comfort has changed significantly after months of use
Most users refit every 3–6 months and replace every 6–12 months depending on grinding intensity.
FAQs
What if I order the wrong size? Reviv typically offers a size exchange for a small fee ($10–15). Check the current exchange policy on the product page.
Can I trim the guard if it's too large? Not recommended — trimming affects structural integrity and fit stability.
Can I use a large guard if I have a smaller mouth? Only if you're experienced with oral appliances and specifically need greater vertical height. For most users, proper sizing produces better outcomes.
Is the same size used across both models? Generally yes — if you're a Medium in Reviv One, you'll typically be a Medium in Reviv Two.
How do I know when to size up? If the current guard feels consistently loose, slips during sleep despite correct fitting, or doesn't seem to be staying in place, a size reassessment is worth doing.
Bottom Line
Choose the size that fits your arch width comfortably and stays in place through the night. When in doubt, size up.
Consistent nightly use with the right size is what produces results — not the perfect first-try fit.
Choose your Reviv guard here.
Reviv is an oral appliance registered with the FDA as a Class I device. It is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Individual experiences vary. Consult a qualified healthcare professional if you experience jaw pain, teeth grinding, or persistent discomfort.