Can Aligners Fix Flared Teeth Caused by Tongue Thrusting?

Flared teeth caused by tongue thrusting represent a common adult orthodontic challenge. While clear aligners can effectively reposition the teeth, addressing the underlying tongue habit is essential for stable, long-term results. This guide explores how aligners work for tongue-thrust flaring, the importance of myofunctional therapy and what realistic outcomes to expect.

Aligners for Tongue Thrust Flaring: Quick Guide

Clear aligners can effectively reposition flared teeth caused by tongue thrusting, but lasting results require addressing the underlying tongue habit through myofunctional therapy alongside or following alignment. Without habit correction, teeth often re-flare. Combined treatment offers best long-term outcomes.

Understanding Tongue Thrust

What it actually is:

Definition:

• Tongue position during swallowing where it pushes against or between teeth.
• Normal swallowing: tongue tip touches roof of mouth.
• Tongue thrust: tongue tip pushes against front teeth.
• Many adults have undiagnosed tongue thrust.

Frequency:

• 2,000+ swallows daily.
• Cumulative force significant over time.
• Constant pressure during day and night.

Effects on teeth:

• Front teeth flare outward.
• Anterior open bite sometimes develops.
• Spaces between teeth.
• Speech issues in some cases.
• Chewing difficulties sometimes.

How Tongue Thrust Causes Flaring

The mechanism:

Repeated forces:

• Each swallow applies tongue pressure.
• Speaking also involves tongue forward.
• Resting position sometimes between teeth.
• Cumulative effect over years.

Biological response:

• Bone remodels in response to pressure.
• Teeth move away from pressure source.
• Front teeth push outward.
• Lower teeth pushed forward sometimes.
• Open bite develops in some cases.

Why it persists:

• Habitual pattern from childhood often.
• Unconscious behaviour.
• Self-reinforcing with tooth position changes.
• Comfortable to patient.

Aligner Treatment for Flared Teeth

How treatment works:

Mechanical correction:

• Aligners apply pressure opposite to tongue thrust.
• Push teeth back to ideal position.
• Bone remodels in response.
• Teeth realign properly.

Treatment elements:

• Standard aligner treatment.
• Sometimes elastics for additional force.
• Attachments for grip.
• Refinements as needed.

Treatment time:

• Mild flaring: 6-12 months.
• Moderate flaring: 12-18 months.
• With open bite: 18-24 months.
• Comprehensive cases: 24+ months.

For aligner options, see adult braces.

The Critical Issue: Why Habit Must Be Addressed

Without treating tongue thrust:

Predictable relapse:

• Teeth re-flare after treatment.
• Sometimes within months.
• Same forces cause same results.
• Treatment essentially wasted.

Why retainers alone insufficient:

• Cannot resist continuous tongue forces.
• Eventually fail without habit correction.
• Even fixed retainers can have problems.

The reality:

• Address habit = stable results.
• Don't address habit = recurrence likely.
• Time investment in habit therapy worthwhile.

Myofunctional Therapy

Treating the underlying habit:

What it is:

• Therapy program retraining oral muscles.
• Tongue position retraining.
• Swallowing pattern correction.
• Resting muscle position.
• Speech sounds sometimes.

Provider types:

• Speech therapist with myofunctional training.
• Specialised myofunctional therapist.
• Some orthodontists offer in-house.

Treatment process:

• Assessment of current patterns.
• Tailored exercises for individual.
• Daily practice required.
• Regular follow-up appointments.
• Progress monitoring.

Duration:

• 3-12 months typically.
• Lifelong awareness required.
• New habits become automatic with practice.

Combined Treatment Approach

Optimal sequence:

Pre-treatment:

• Assessment for tongue thrust.
• Myofunctional therapy referral.
• Begin tongue retraining.
• Establish new patterns.

During aligner treatment:

• Continue myofunctional exercises.
• New tongue position maintained with aligners in.
• Reinforce new habits.
• Progress in both treatments.

Post-treatment:

• Continue myofunctional therapy until habits automatic.
• Retainers for lifelong.
• Monitoring for relapse.
• Reinforcement if needed.

Tongue Position — The New Normal

Correct position:

Tongue at rest:

• Tip touches spot just behind upper front teeth (incisive papilla).
• Body of tongue against roof of mouth.
• Sides of tongue against upper back teeth.
• NOT touching front teeth.
• NOT between teeth.

During swallowing:

• Tongue tip to incisive papilla.
• Tongue rolls back against palate.
• NO front teeth contact.
• Lips relaxed (not pursed).
• Cheeks not sucked in.

During speech:

• Most sounds away from front teeth.
• Specific sounds (s, t, d, n, l) need precision.
• Speech therapy can help.

Identifying Tongue Thrust

Self-check possible:

Watch yourself swallow:

• Mirror in front of you.
• Sip water and swallow normally.
• Note tongue position.
• Lips behaviour when swallowing.

Common signs:

• Tongue visible between teeth when swallowing.
• Lips purse or strain when swallowing.
• Open bite between front teeth.
• Flared front teeth.
• Spacing issues.
• Speech sometimes affected (lisp).

Professional assessment:

• Orthodontist can identify.
• Myofunctional therapist specialised assessment.
• Speech therapist for related issues.

Treatment Outcomes

What to expect:

With combined treatment (aligners + myofunctional therapy):

• Long-term stability excellent.
• Aesthetic improvement maintained.
• Functional improvement.
• Speech often improves.
• Patient satisfaction high.

With aligners alone (no habit correction):

• Initial improvement good.
• Relapse risk significant.
• 5-10 years sometimes back to original.
• Frustrating for patient.
• Investment essentially lost.

With myofunctional therapy alone:

• Improvement in tongue position.
• Limited tooth correction in adults.
• Some children can self-correct.
• Adults generally need orthodontic correction too.

Special Considerations

For children:

• Habit modification more effective.
• Growing jaws allow significant change.
• Early intervention prevents adult problems.
• Easier to modify habits in children.

For adults:

• Combined treatment essential.
• Adult bone still remodels.
• Habit modification harder but possible.
• Long-term commitment important.

For patients with anterior open bite:

• Often caused by tongue thrust.
• Combined treatment essential.
• Sometimes surgical for severe cases.
• Treatment more complex.

For patients with previous orthodontic relapse:

• Tongue thrust often unaddressed cause.
• Address now for lasting result.
• Combined approach prevents further relapse.

Cost Considerations

Investment perspective:

Aligner treatment: £3,000-£6,000 typically.

Myofunctional therapy: £500-£2,000 (varies by provider and duration).

Total: £3,500-£8,000.

Worth investment:

• Long-term stability.
• Avoids retreatment costs.
• Functional benefits.
• Aesthetic improvements.

Compared to retreatment:

• Single comprehensive treatment less expensive than treatment + retreatment.
• Time investment less.
• Frustration avoided.

For ongoing care, see dental membership options.

Maintenance After Treatment

Long-term care:

• Lifelong retainers.
• Continued tongue position awareness.
• Periodic check-ups.
• Monitor for relapse signs.
• Hygiene appointments — see hygienist services.
• Address grinding if developing — see tooth grinding management.

What If You've Already Had Orthodontics?

For relapse cases:

Reassessment:

• Determine if tongue thrust contributed to relapse.
• Comprehensive examination.
• Treatment options for current state.

Treatment options:

• Limited orthodontics for minor relapse.
• Comprehensive retreatment for significant relapse.
• Aligners good for most retreatment cases.
• Myofunctional therapy essential this time.

Lifelong commitment:

• Retention more rigorous.
• Habit awareness continued.
• Regular monitoring.

Speech Considerations

When tongue thrust affects speech:

Common issues:

• Lisp (especially "s" sounds).
• Imprecise consonants (t, d, n, l).
• Front teeth position affecting sounds.

Treatment:

• Speech therapy alongside or after orthodontics.
• Often improves with tooth realignment.
• Habit changes support speech improvements.
• Coordinated care optimal.

Key Points to Remember

• Aligners can effectively correct tongue-thrust flaring but habit must also be addressed.
• Myofunctional therapy retrains tongue position and swallowing patterns.
• Without habit correction, relapse very likely after orthodontic treatment.
• Combined treatment provides best long-term stability.
• Lifelong retainer wear essential after treatment.
• Adult patients can successfully complete treatment but need commitment to combined approach.

Frequently Asked Questions

How can I tell if I have a tongue thrust?

Several self-assessment methods:

Mirror test:

• Sit in front of mirror
• Take small sip of water
• Swallow normally (don't think about it)
• Watch lips and mouth area
• Tongue visible? Lips purse? Cheeks suck in? — All suggest tongue thrust

Open mouth swallow test:

• Try to swallow with mouth open
• Difficult or impossible — normal pattern
• Easy to do — likely tongue thrust pattern

Visual signs in your teeth:

• Flared front teeth (sticking out)
• Open bite (front teeth don't meet when biting)
• Spaces between front teeth
• Lower front teeth also flared sometimes

Symptom signs:

• Lisp in speech
• Difficulty pronouncing s, t, d, n, l sounds clearly
• Mouth breathing habits
• Constantly swallowing or thirsty
• Tongue scallops on sides (from pressing against teeth)

Professional assessment:

• Orthodontist examination
• Myofunctional therapist specialised assessment
• Speech therapist if speech affected
• Photographs and video sometimes used
• Functional analysis

Important:

Many adults have tongue thrust without being aware. It's typically a habit from childhood that persists into adulthood. Recognition is first step to addressing — for both functional and orthodontic reasons.

Will my teeth flare back if I don't do myofunctional therapy?

Likely yes, in significant percentage of cases:

Research findings:

• Significant relapse in 30-70% of tongue-thrust cases without habit correction
• Often within 5-10 years
• Sometimes much faster
• Quality of original treatment less important than ongoing forces

Why retention alone insufficient:

• Continuous forces day and night
• 2,000+ swallows daily
• Eventually overcome retention
• Bone remodels to forces

With habit correction:

• Stability rates significantly improve
• 70-90% stability with combined approach
• Lifelong stability achievable
• Worth investment

Specific risk factors for relapse:

• Severe original tongue thrust
• Anterior open bite in original presentation
• Inadequate retainer wear
• No habit modification
• Mouth breathing habits
• Allergies affecting nasal breathing

To minimise relapse risk:

• Complete myofunctional therapy
• Excellent retainer compliance
• Address related issues (allergies, mouth breathing)
• Regular monitoring
• Reinforcement of habits

Realistic expectation:

Without addressing habit, plan for likely retreatment in 5-10 years. With habit addressed, plan for stable long-term results. The cost-benefit strongly favours addressing habit for most patients.

How long does myofunctional therapy take?

Variable but typically:

Initial intensive phase:

• 3-6 months of regular sessions
• Weekly or biweekly appointments initially
• Daily home practice essential
• Progress monitoring

Maintenance phase:

• Monthly check-ups for 3-6 more months
• Continued home practice
• Habit becoming automatic

Lifelong awareness:

• Habit established but reinforcement helpful
• Stress can trigger old patterns
• Periodic reassessment beneficial
• Self-monitoring important

Daily practice expectations:

• 15-20 minutes initially
• Reduced as habits establish
• Specific exercises prescribed
• Tongue, lip, cheek training

Adult vs child:

• Adults typically take longer
• Established habits harder to change
• Children more adaptable
• Both can succeed with commitment

Combined with orthodontics:

• Often parallel with aligner treatment
• Reinforces during treatment
• Continues after orthodontic completion
• Lifelong maintenance

Realistic commitment:

6-12 months of regular therapy with daily practice, then maintenance. Sounds significant but produces lifelong benefits versus likely orthodontic retreatment without it.

Can adults really change a tongue thrust habit they've had since childhood?

Yes, with commitment:

Research confirms:

• Adult neuroplasticity allows habit change
• Conscious effort retrains automatic patterns
• 6-12 months typically needed
• Success rates good with commitment

Why it works:

• Brain pathways can be retrained
• Muscle memory can be modified
• Conscious practice becomes automatic
• Reinforcement strengthens new pathways

Why some adults struggle:

• Lifelong habit deeply ingrained
• Less compliance with practice
• Concurrent issues (allergies, anatomy)
• Inadequate professional support

Maximising success:

• Find experienced therapist
• Commit to daily practice
• Track progress
• Address related issues
• Be patient with process
• Don't quit when difficult

Realistic outcomes:

• Most adults can successfully change with effort
• Time required typically 6-12 months
• Lifelong awareness needed
• Periodic reinforcement helpful
• Worth the effort for orthodontic stability

For patients who try:

• Significant improvement common
• Complete elimination possible but harder
• Reduced problems even with partial change
• Combined with orthodontics very successful

Adults shouldn't be discouraged from trying — most achieve meaningful improvement with appropriate professional support and commitment.

Will fixing my tongue thrust improve my speech too?

Often yes:

Common speech improvements:

• Lisp reduction (s, z sounds)
• Clearer consonants (t, d, n, l)
• Better articulation generally
• More confident speech
• Reduced mouth strain

How improvement happens:

• New tongue position allows precise sounds
• Tooth realignment supports clear articulation
• Combined improvement of habit and structure
• Practice of new patterns reinforces

For severe speech issues:

• Speech therapy may also be needed
• Specialised training for specific sounds
• Coordinated with myofunctional therapy
• Often successful

For mild issues:

• Often resolve with myofunctional therapy alone
• Tooth realignment supports
• Adult speech patterns adaptable

Timeline:

• Improvement during myofunctional therapy
• Continued improvement after orthodontics
• Self-monitoring important
• Recording yourself to assess progress

Professional input:

• Speech-language pathologist referral if needed
• Myofunctional therapist often addresses both
• Orthodontist input on tooth contributions
• Coordinated care optimal

Important:

Speech changes can take time to consolidate. Some patients notice immediate improvement; others need months of practice. Combined orthodontic and myofunctional treatment usually produces meaningful speech improvements alongside orthodontic and functional benefits.

What about sleep apnea — does tongue thrust contribute?

Possible connection in some cases:

Tongue position factors:

• Forward tongue position can affect airway
• Mouth breathing often associated
• Neuromuscular dysfunction common
• Sleep position sometimes affected

However:

• Sleep apnea has many causes
• Not all tongue thrust patients have apnea
• Not all apnea patients have tongue thrust
• Other factors more important typically

Comprehensive assessment:

• Sleep study for apnea diagnosis
• Multiple causes to address
• Coordinated care needed
• Specialist input

Myofunctional therapy for apnea:

• Emerging evidence for benefit
• Tongue strengthening exercises
• Breathing pattern correction
• Adjunctive treatment
• Not primary treatment

Combined approach:

• Sleep study if apnea suspected
• CPAP or other apnea treatment if needed
• Orthodontics for dental issues
• Myofunctional therapy for habit and possibly apnea
• Comprehensive care

Don't confuse:

• Tongue thrust is dental/orthodontic primarily
• Sleep apnea is medical, often serious
• Both can coexist
• Both need appropriate professional care

If sleep apnea symptoms (snoring, daytime sleepiness, witnessed pauses in breathing), discuss with GP for sleep study referral. Don't rely on dental treatment alone for apnea.

Conclusion

Clear aligners effectively reposition flared teeth caused by tongue thrusting, but lasting results require addressing the underlying tongue habit through myofunctional therapy. Combined treatment provides best long-term stability and avoids relapse. Lifelong awareness of tongue position, plus retainer wear, maintains results and supports oral health.

For specific assessment of tongue thrust and orthodontic options, comprehensive consultation provides personalised options. Dental symptoms and treatment options should always be assessed individually during a clinical examination.

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Disclaimer:

This article is intended for general educational purposes only and does not constitute personalised dental advice. Individual diagnosis and treatment recommendations require a clinical examination by a qualified dental professional.

Written Date: 29th April 2026

Next Review Date: 29th April 2027