What Is Tongue Thrust?

Key Takeaway: Tongue thrust is a habit where your tongue pushes forward against your teeth when you swallow. While babies naturally do this when they're born, most kids outgrow it by age 4 or 5. When the habit persists, it's called a myofunctional disorder. About...

Tongue thrust is a habit where your tongue pushes forward against your teeth when you swallow. While babies naturally do this when they're born, most kids outgrow it by age 4 or 5. When the habit persists, it's called a myofunctional disorder. About 20-25% of children still have tongue thrust, and it becomes even more common in kids with an open bite (a gap between upper and lower front teeth).

The problem is simple: your tongue is incredibly strong. Learn more about Cost of Teeth Movement for additional guidance. When it pushes forward constantly, it can undo everything your child's braces are trying to accomplish.

Why Tongue Thrust Interferes With Braces

Every time your child swallows—which happens 600 to 2,000 times per day—the tongue pushes forward with 300-500 grams of force. That's way more powerful than the gentle, steady pressure braces apply (which is only 50-100 grams). Think of it like trying to push a door closed while someone else is pushing it open harder and more frequently.

When tongue thrust is present, teeth can actually move backward after braces are removed. Learn more about How to Orthodontic Compliance for additional guidance. Studies show that without addressing tongue thrust, about 40-60% of kids experience relapse (teeth moving back toward their original position) within 12-36 months after braces come off. That's why your orthodontist might recommend therapy before or during braces treatment.

Signs Your Child Has Tongue Thrust

Watch for these clues:

  • Resting position: When your child's mouth is closed and relaxed, the tongue tip points forward toward the teeth instead of resting on the roof of the mouth
  • Swallowing: You can see the tongue pushing out between the teeth during swallowing
  • Speech: A slight lisp, especially on 's' and 'z' sounds
  • Open bite: A visible gap between the front teeth when biting down
  • Mouth breathing: Your child often breathes through the mouth instead of the nose

Why This Habit Develops

Tongue thrust usually starts because of something that happened earlier in childhood:

  • Enlarged tonsils or adenoids: These block the airway, forcing the tongue to move forward to help breathing
  • Allergies: Blocked nasal passages lead to mouth breathing and forward tongue positioning
  • Pacifier or thumb sucking: These habits that should end by age 4-5 can train the the muscle to position forward
  • Delayed development: Sometimes the tongue muscles just develop slower
The good news? Most causes are fixable, especially when addressed early.

Breaking the Habit: Therapy Exercises

Speech and orofacial therapists use special exercises to retrain how your tongue moves. This process is like learning a new habit—it takes practice but works really well.

Tongue resting position: Your child learns to place the tip of the tongue on the roof of the mouth (the hard palate), about half an inch behind the upper front teeth. This becomes the new "default" position. Swallowing practice: Once the it learns the right resting position, your child practices swallowing while keeping the tongue in that spot. This teaches the muscles the correct movement pattern. Strengthening exercises: Resistance exercises make the muscles stronger and help them hold the correct position. Your child might push the the muscle against a depressor or hold certain tongue positions for several seconds. Lip seal training: For kids who mouth-breathe, exercises teach them to keep their lips closed, which naturally encourages nose breathing and proper tongue positioning.

With consistent practice (usually 2-3 sessions per week for 3-6 months), about 75-90% of kids successfully retrain their swallowing. Many see improvement within just a few weeks.

Addressing Airway Issues

If your child's tongue thrust is related to blocked airways from adenoids, allergies, or other issues, those need to be addressed too. Your orthodontist may recommend a checkup with an ear, nose, and throat (ENT) specialist. Sometimes simple treatments like allergy management or removing enlarged adenoids make a huge difference.

Interestingly, kids often see improvement in tongue position on their own after adenoidectomy, since they can suddenly breathe through their nose more easily.

Braces Plus Therapy: The Winning Combination

The best approach combines habit correction with braces, not one after the other. Here's the typical plan:

Phase 1 (0-3 months): Focus on correcting tongue thrust through exercises before starting major tooth movement. Some teeth may actually move slightly just from the tongue repositioning. Phase 2 (3-12 months): Begin braces while continuing tongue exercises. Your child might wear a "tongue crib" (a thin wire device that reminds the tongue to stay in the right position) if needed. Phase 3 (12+ months): Keep braces on while the new tongue habit becomes automatic. This usually takes longer than people expect—about 6-12 months of consistent practice. Phase 4 (After braces): Extended retainers keep teeth in place while the muscles stay trained. The retainer works as a safety net while the tongue habit becomes permanent.

When this combined approach is used, the success rate jumps to 70-85%, which is much better than braces alone.

What About Tongue Cribs?

Some orthodontists use a "tongue crib"—a small wire device fixed to the roof of the mouth that physically prevents the tongue from pushing forward. Think of it as a training wheel for your mouth.

Tongue cribs work best when combined with exercises, not as a substitute. The device reminds the it to position correctly, but exercises train the muscles to do it automatically without the device. Most kids wear tongue cribs for 6-12 months.

Your Child's Role in Success

Kids who understand why they're doing exercises are more likely to stick with them. Explain it simply: "The tongue is strong, but it's pushing your teeth the wrong way. These exercises teach your tongue to push the right way, so your braces can work better."

Make it part of the daily routine—like brushing teeth. Set reminders, celebrate progress, and show genuine interest in how the exercises feel. Kids who feel supported by their parents do better.

When to Start Treatment

The best age to address tongue thrust is 7-12 years old. Kids this age are old enough to understand instructions, young enough that habits aren't deeply ingrained, and their bones and muscles are still very adaptable.

If your child is older or has had tongue thrust for many years, treatment is still possible—it just might take a bit longer. Teenagers and adults can learn new swallowing patterns, though it requires more motivation and consistent practice.

Every patient's situation is unique. Talk to your dentist about the best approach for your specific needs.

Conclusion

Tongue thrust represents a significant challenge in orthodontic treatment, opposing mechanical correction through continuous anterior force application. The disorder develops through persistent infantile swallowing patterns, frequently associated with airway obstruction and mouth breathing. Successful treatment requires early diagnosis, referral for comprehensive myofunctional therapy, and integration of behavioral retraining with orthodontic correction. Success rates of 75-90% for myofunctional therapy combined with 70-85% long-term orthodontic stability can be achieved through coordinated interdisciplinary management.

> Key Takeaway: Tongue thrust doesn't have to sabotage your child's braces. Early detection and combined therapy plus orthodontics achieves excellent results in most kids. If your orthodontist mentions tongue thrust, don't worry—it's fixable with the right approach and your child's cooperation.