What happens to your child's teeth if a tongue tie is never treated
Many parents first hear about tongue tie during the newborn period, usually in the context of breastfeeding difficulties. A lactation consultant notices the restriction, recommends an evaluation, and the family either pursues treatment or — more often than people realize — decides to wait and see. The feeding improves enough to manage, life gets busy, and the tongue tie quietly remains.
What most families are not told in those early weeks is that an untreated tongue tie does not simply stop being relevant once breastfeeding ends. Its effects on jaw development, breathing, teeth, and sleep continue — and in many cases compound — throughout childhood and into adolescence. The consequences are rarely dramatic or sudden. They accumulate gradually, which is precisely why so many cases go unrecognized until the problems they caused are already significant.
At Tooth + Tongue – Specialized Dentistry and Anesthesia in Walnut Creek, tongue tie evaluation and treatment is one of the most important parts of our functional pediatric care. Understanding what an untreated tongue tie does over time helps parents recognize signs they may have been living with for years — and understand why addressing it still matters, even after infancy.
How tongue position drives jaw development
To understand the downstream effects of an untreated tongue tie, it helps to start with what the tongue is supposed to be doing.
In a mouth that is functioning properly, the tongue rests gently but consistently against the roof of the mouth — the palate — when at rest. This contact is not incidental. It is the primary mechanical stimulus for palate widening and forward jaw development. The tongue's resting pressure, applied thousands of times per day through swallowing and at baseline rest, literally shapes how the upper jaw grows.
When the tongue is restricted by a tight frenulum, it cannot reach the palate comfortably. Instead, it rests low — on the floor of the mouth, pressed against the lower teeth, or pooled behind the front teeth. The stimulus for healthy palate development is absent or dramatically reduced. The jaw responds accordingly: it grows narrower and higher-arched than it would have with proper tongue function.
This is not a theory. It is a well-documented developmental relationship, and it is why tongue tie is considered a functional issue rather than simply a structural one.
The cascade of effects over time
A narrow, high-arched palate
The first and most direct consequence of an untreated tongue tie is a palate that develops narrower than it should. Parents sometimes notice this themselves — a roof of the mouth that looks unusually high and tent-shaped, with a prominent ridge running down the center.
A narrow palate affects far more than aesthetics. It reduces the floor space of the nasal cavity directly above it, contributing to nasal congestion and airflow restriction. It creates less room for the tongue, which further reinforces the low-resting pattern. And it sets the stage for the crowding and airway problems that follow.
Dental crowding
A jaw that is too narrow for the teeth trying to erupt in it produces crowding. This seems straightforward — and it is — but parents often do not connect their child's crowded teeth to a tongue tie that was noticed and dismissed years earlier.
In children with untreated tongue ties, crowding tends to appear earlier and progress more predictably than in children with adequate jaw development. Teeth erupt in rotated, overlapping, or displaced positions because there is simply not enough arch space to accommodate them. By the time all the permanent teeth have come in, the crowding is typically significant enough to require orthodontic intervention.
What is worth understanding is that in many of these cases, the crowding was not inevitable. It was the downstream result of a jaw that did not develop its full genetic potential because the tongue was not able to do its developmental job.
Mouth breathing
A narrow palate and restricted nasal airway push the child toward breathing through the mouth. Mouth breathing becomes a compensatory habit — and then, over time, a structural reinforcement. Because mouth breathing keeps the lips apart and the tongue low, it removes whatever remaining stimulus existed for palate development and further narrows the jaw.
Chronic mouth breathing also bypasses the nasal passages entirely, depriving the body of the filtration, humidification, and nitric oxide production that nasal breathing provides. Children who mouth breathe chronically are more susceptible to upper respiratory infections, allergies, and disrupted sleep.
Sleep-disordered breathing
As the airway narrows, sleep quality is the first major casualty. Children with untreated tongue ties and the narrow jaws that develop as a result are significantly more likely to snore, breathe noisily during sleep, and experience the repeated micro-arousals of sleep-disordered breathing.
In more significant cases, this progresses to obstructive sleep apnea — repeated episodes of partial or complete airway obstruction during sleep. The consequences of disrupted sleep in a developing child are wide-ranging: impaired growth hormone release, behavioral changes, difficulty concentrating, hyperactivity, and academic challenges that are frequently attributed to other causes entirely.
Speech and articulation
The tongue is the primary articulator of speech. Sounds like l, r, t, d, n, th, and s all require precise tongue placement that a restricted tongue cannot reliably achieve. Children with untreated tongue ties often have articulation difficulties that persist despite speech therapy — because therapy alone cannot overcome a structural restriction in tongue movement.
Many children with tongue ties receive years of speech therapy without significant progress before a tongue restriction is identified as the underlying cause. Addressing the restriction directly — through a frenectomy at Tooth + Tongue – Specialized Dentistry and Anesthesia — often allows speech to improve more rapidly than therapy alone has been able to achieve.
Changes in facial development
Over years of mouth breathing and low tongue posture, the forces acting on the developing face change. The midface tends to grow longer and narrower. The chin may appear more recessed. The overall profile develops differently than it would have with proper nasal breathing and tongue function.
These changes are subtle in early childhood and become more pronounced as the face completes its development in adolescence. By the time they are obvious, the growth window for non-surgical correction has largely closed.
Is it too late to treat an older child?
This is one of the most common questions we hear from parents who first learn about tongue tie when their child is five, eight, or twelve years old rather than five days old.
The answer is no — it is not too late. A frenectomy remains effective at any age, and addressing tongue restriction in an older child still removes the mechanical barrier to proper tongue function. The tongue can then begin to rest and function more normally, which supports whatever structural development or orthodontic work is also underway.
What changes with age is the extent to which structural consequences can be reversed without additional intervention. An older child whose jaw has already developed narrow will typically need palatal expansion alongside or following frenectomy to address the structural result of years of restricted tongue function. At Tooth + Tongue – Specialized Dentistry and Anesthesia in Walnut Creek, we frequently see children in this situation and approach treatment as a combined plan — releasing the restriction and then supporting healthy development through expansion, the Vivos program, or both.
Myofunctional therapy after treatment
For older children especially, frenectomy is most effective when combined with myofunctional therapy — a program of tongue and oral muscle exercises that helps retrain the tongue to rest and function in its correct position. Without this retraining, the tongue may not automatically adopt proper posture even after the physical restriction is released, simply because years of low-resting habit have become the default pattern.
At Tooth + Tongue – Specialized Dentistry and Anesthesia, we discuss myofunctional therapy as part of the treatment conversation for every child where retraining is likely to be beneficial.
Recognizing an untreated tongue tie in your child
Parents of older children sometimes ask how they would know if their child has a tongue tie that has never been formally assessed. Some signs are visible; others are functional.
Structurally, a restricted frenulum may be visible as a tight band under the tongue that pulls the tongue tip into a heart shape when extended, or limits how far the tongue can lift toward the roof of the mouth. However, posterior tongue ties — restrictions further back along the frenulum — are often not visible at all and require a trained clinical assessment to identify.
Functionally, the signs of an untreated tongue tie in an older child often include a narrow palate, significant dental crowding, mouth breathing, snoring, speech articulation difficulties, and a tendency to fatigue easily while eating foods that require sustained chewing.
If several of these descriptions fit your child, an evaluation at Tooth + Tongue – Specialized Dentistry and Anesthesia in Walnut Creek is a worthwhile next step — regardless of whether tongue tie has ever been raised before.
Ready to get started on your family's new dental journey? Contact us here!
Call (925) 949-8427
1800 San Miguel Dr. Walnut Creek, CA 94596
