Braces Again? Why Teeth Shift Over Time & How Myofunctional Therapy Can Help

Braces Again? Why Teeth Shift Over Time & How Myofunctional Therapy Can Help

Many people finish orthodontic treatment expecting their teeth to stay perfectly aligned forever. Years later, they may notice crowding returning, gaps reopening, or teeth shifting out of place.

If you’ve ever wondered why teeth move after braces or Invisalign, the answer often involves more than just forgetting to wear retainers.

At The Mouth Rehab, we help patients understand how oral habits, tongue posture, breathing patterns, and muscle function can directly influence tooth position over time.

Why Do Teeth Shift?

Teeth exist in a delicate balance between the tongue, lips, cheeks, and surrounding muscles. When muscle pressures are imbalanced, teeth can slowly move.

Even after orthodontic treatment is complete, the forces created by oral habits and dysfunctional muscle patterns continue every single day.

Common causes of shifting teeth include:

• Mouth breathing

• Low tongue posture

• Tongue thrust swallowing

• Nail biting

• Finger or thumb sucking

• Chewing on objects

• Clenching or grinding

• Improper swallowing patterns

• Poor retainer compliance

Oral Habits That Can Move Teeth

Finger or Thumb Sucking

Prolonged thumb or finger sucking places pressure on developing teeth and the palate.

This can contribute to:

• Open bites

• Narrow palates

• Protruding front teeth

• Speech concerns

• Improper tongue posture

Even after orthodontic correction, continued sucking habits can cause teeth to relapse.

Nail Biting

Nail biting places repeated pressure on the front teeth and jaw muscles. Over time, this habit may contribute to:

• Chipped teeth

• Tooth movement

• Jaw tension

• Uneven bite patterns

Because this habit often occurs subconsciously throughout the day, the repetitive forces can significantly impact alignment.

Chewing on Objects

Chewing on pens, pencils, clothing, ice, or other objects can place uneven pressure on the teeth and jaw.

These repetitive habits may contribute to:

• Tooth wear

• Minor tooth movement

• Jaw discomfort

• Muscle tension

Tongue Thrust: The Hidden Cause of Orthodontic Relapse

One of the most overlooked causes of shifting teeth is tongue thrust.

A tongue thrust occurs when the tongue pushes against or between the teeth during swallowing, speaking, or at rest.

The average person swallows between 1,000–2,000 times per day. If the tongue consistently pushes against the teeth, it creates enough force over time to move them.

Signs of Tongue Thrust:

• Teeth shifting after braces

• Open bite

• Speech differences

• Mouth breathing

• Difficulty keeping lips closed

• Tongue visible during swallowing

Without addressing tongue posture and swallowing function, orthodontic relapse may continue even after multiple rounds of braces or aligners.

How Myofunctional Therapy Helps

Myofunctional therapy addresses the root muscle patterns contributing to tooth movement.

Therapy focuses on:

• Correct tongue posture

• Proper swallowing patterns

• Nasal breathing

• Lip seal strength

• Oral resting posture

• Habit elimination

By retraining the muscles of the mouth and face, myofunctional therapy helps create a more stable environment for long-term orthodontic success.

This can be especially beneficial for:

• Children with oral habits

• Teens after braces

• Adults experiencing relapse

• Patients preparing for orthodontic treatment

• Patients considering braces for a second time

Orthodontics Straighten Teeth — Muscles Help Keep Them There

Braces and aligners move teeth into position, but muscle function helps maintain those results. When dysfunctional habits and tongue posture are not addressed, teeth may continue shifting despite orthodontic treatment.

Ready to Protect Your Smile?

At The Mouth Rehab, we help children, teens, and adults address the underlying oral habits and muscle patterns that contribute to orthodontic relapse.

Contact The Mouth Rehab today to schedule an evaluation and learn how myofunctional therapy can support long-term orthodontic stability and healthier oral function.