Clenching your jaw without even realizing it when you’re stressed. Grabbed a cheap mouthguard from the drugstore, only to end up with worse jaw pain? Here’s exactly what the difference is between store-bought guards and custom dental splints.
Soft, boil-and-bite store guards can trigger a “chewing reflex” that makes clenching worse and may damage your bite over time. Hard, custom-fitted splints made by a dentist are the generally recommended option — but they run $300-700+ and typically aren’t covered by insurance.
1. The Causes Aren’t Fully Understood
Teeth grinding (bruxism) results from jaw muscle contraction, but why the muscles contract in the first place isn’t fully understood. Current thinking points to a combination of factors: sleep breathing disorders (snoring, sleep apnea) and TMJ issues, psychological factors like stress and anxiety, and lifestyle factors like alcohol and smoking. Older theories focused mainly on bite alignment, but current research places more emphasis on the connection to arousal responses during sleep.
2. It Happens During the Day Too
Normal spacing between upper and lower teeth is about 2-3mm at rest. Under stress or intense concentration, people often unconsciously clench without realizing it. Because it happens unconsciously, it’s often only discovered after jaw or dental problems appear.
3. Prevalence Decreases With Age
📊 Children: ~17% → Teens: ~15% → Middle age: ~8% → Elderly: ~3%
Bruxism prevalence is reported to decrease with age. That said, this doesn’t mean it’s safe to ignore now — frequent grinding can lead to chewing dysfunction, structural tooth damage, and sleep disturbances.
4. Why Store-Bought Mouthguards Can Backfire
🔴 Fixed sizing that can’t be adjusted to your bite
🔴 Long-term use can cause teeth to feel tight or sensitive
🔴 Possible bite misalignment from tooth movement
🔴 Poor fit can even disrupt sleep, causing frequent waking
Soft, boil-and-bite type guards may actually encourage more unconscious clenching behavior, making them not recommended for long-term use.
5. Custom Splints vs. Store-Bought
| Store-Bought | Custom Splint | |
|---|---|---|
| Fabrication | Fixed size, no adjustment | Precisely molded to your bite |
| Risk | Possible bite misalignment | No such risk |
| Cost | Inexpensive | $300-700+ typically |
| Insurance | Not covered | Usually not covered (varies by plan) |
6. If You’re Wearing One for More Than 2 Weeks
Short-term wear generally causes no issues, but if you’re wearing a splint for more than 2 weeks, get your device and oral condition checked. Long-term wear can also cause bite changes, requiring periodic adjustment.
7. Beyond Mouthguards: Other Treatment Options
💉 Botulinum toxin injections — into the jaw muscles (masseter, temporalis), temporarily reducing muscle activity for several months
😴 CPAP therapy — when sleep apnea or snoring is a contributing factor
💊 Physical therapy — heat therapy, low-frequency stimulation
Relying on a mouthguard alone often isn’t a complete treatment — experts generally recommend identifying which underlying factor is most influential before choosing an approach.
8. What to Track Before Your Dental Visit
🔊 Frequency and pattern of jaw clicking or popping sounds
🌙 Whether you grind at night or clench during the day
😮 Pain or limited range when opening your mouth
🤕 Location and frequency of associated headaches, ear pain, or facial pain
Frequently Asked Questions
Q: Can I just use a drugstore mouthguard indefinitely?
It may be fine for short-term impact protection, but long-term use isn’t recommended. A custom-fitted dental splint is the safer long-term option.
Q: Will reducing stress alone fix my teeth grinding?
Stress is one contributing factor, but the causes are typically multifactorial. Stress management combined with an appropriate treatment approach for your specific situation tends to work better than either alone.
Q: Is a custom splint expensive because insurance doesn’t cover it?
Splints and mouthguards are typically not covered because they’re individually custom-fabricated, making standardized insurance coverage difficult. However, related physical therapy treatments may sometimes be covered — worth checking with your provider.