Best Night Guards for Teeth Grinding
Finding the best night guard for teeth grinding can save your enamel and eliminate morning jaw pain, but the wrong guard can actually make bruxism worse. We spent months measuring the thickness loss of top custom and OTC guards with digital calipers to find out which ones actually last.
Hard Night Guard (Heavy Grinding)
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | lab-custom |
| Material | Elasticized Acrylic |
| Price (RRP) | $190 |
| Thickness (initial) | 1.55 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 3.2% |
| Fit Retention | held |
| Moldability Score | N/A (lab-custom) |
| Bite-Through Observed | No ✓ |
✅ Pros
- Incredibly thin and comfortable
- Minimal wear under heavy grinding
- Professional lab-made fit
❌ Cons
- High upfront cost
- Requires taking your own impressions
Extra Durable Hard Shield (3mm)
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | lab-custom |
| Material | Hard FDA-cleared material |
| Price (RRP) | $170 |
| Thickness (initial) | 3.00 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 2.7% |
| Fit Retention | held |
| Moldability Score | N/A (lab-custom) |
| Bite-Through Observed | No ✓ |
✅ Pros
- Unmatched durability
- Perfect custom fit
- Handles severe bruxism effortlessly
❌ Cons
- Thick 3.00mm profile isn't for everyone
- High upfront cost
NightGuard Advanced Comfort
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | boil-and-bite |
| Material | Dual-layer thermoplastic |
| Price (RRP) | $39.9 |
| Thickness (initial) | 2.20 mm |
| Durometer (Shore A) | 88 |
| Nights Tested | 30 nights |
| Thickness Loss | 4.5% |
| Fit Retention | held |
| Moldability Score | 4/5 |
| Bite-Through Observed | No ✓ |
✅ Pros
- Excellent durability (only 4.5% loss)
- Thinner profile than competitors
- Good value for money
❌ Cons
- Takes some effort to get the perfect fit
Custom Night Guards
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | lab-custom |
| Material | Dental-grade plastic |
| Price (RRP) | $170 |
| Thickness (initial) | 2.60 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 3.8% |
| Fit Retention | held |
| Moldability Score | N/A (lab-custom) |
| Bite-Through Observed | No ✓ |
✅ Pros
- Solid durability
- Comes as a set of two
- Subscription model available
❌ Cons
- Thickness anomaly in our sample (2.60mm vs advertised 2.0mm max)
Professional-Fit Maximum Dental Guard
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | boil-and-bite |
| Material | Dual-layer EVA |
| Price (RRP) | $24.9 |
| Thickness (initial) | 3.00 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 8.3% |
| Fit Retention | held |
| Moldability Score | 3/5 |
| Bite-Through Observed | No ✓ |
✅ Pros
- Good durability for OTC
- Firm lower layer
- Stable retention
❌ Cons
- Harder to mold correctly
- Noticeably bulky at 3.00mm
Nighttime Dental Guard
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | boil-and-bite |
| Material | Thermoplastic |
| Price (RRP) | $24.9 |
| Thickness (initial) | 2.80 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 12.5% |
| Fit Retention | held |
| Moldability Score | 5/5 |
| Bite-Through Observed | No ✓ |
✅ Pros
- Extremely easy to mold
- Accessible and affordable
- Held shape well
❌ Cons
- 12.5% thickness loss in 30 days
- Can feel slightly bulky
Grind No More Dental Guard
✓ Wear-tested 30 nights with digital calipers — see our testing protocol
| Spec | Measured |
|---|---|
| Fabrication | ready-to-wear |
| Material | BPA-free plastic |
| Price (RRP) | $19.9 |
| Thickness (initial) | 2.50 mm |
| Durometer (Shore A) | N/A |
| Nights Tested | 30 nights |
| Thickness Loss | 32% |
| Fit Retention | warped |
| Moldability Score | N/A (lab-custom) |
| Bite-Through Observed | Yes ⚠️ |
✅ Pros
- No boiling required
- Individually wrapped
- Cheap per unit initially
❌ Cons
- Wears out rapidly
- Bite through observed
- Not cost-effective for daily long-term use
Frequently Asked Questions
What is the best night guard for severe teeth grinding?
In our caliper-measured tests, custom lab-made hard acrylic guards like Pro Teeth Guard and JS Dental Lab showed the least thickness loss (under 4%) after 30 nights, making them ideal for severe bruxism.
Are OTC boil-and-bite guards effective?
Boil-and-bite guards like Doctor's NightGuard offer good protection and are a cost-effective starting point, but they typically wear down faster than custom dual-laminate or hard acrylic guards.
How long does a night guard last?
Based on our tests: OTC stock guards (Plackers) can bite through within 30 nights. Boil-and-bite guards last 1–4 months for heavy grinders. Custom lab-made hard acrylic guards typically last 2–5 years.
Is a custom night guard worth it?
Yes, for moderate to heavy grinders. Our data shows custom guards (Pro Teeth Guard at $190, JS Dental Lab at $170) have only 2.7–3.2% thickness loss after 30 nights vs 4.5–32% for OTC options. They pay for themselves within 6 months vs replacing cheap guards constantly.