Space to Swallow Well
How tongue posture, swallowing dysfunction, and oral restrictions like tongue-tie affect facial development and airway health.
Observation
“Does the person have a tongue-tie, difficulty swallowing, speech issues, or a tongue that rests low in the mouth?”
Impact
The tongue is the natural expander of the upper jaw. When it can't reach the palate — due to a tie, low posture, or dysfunctional swallow — the face grows downward and backward instead of forward, narrowing the airway.
Evidence & Quick Guides
8 resourcesThe CHAT Trial: A Randomised Trial of Adenotonsillectomy for Childhood Sleep Apnoea
The CHAT trial is considered the gold standard study in this area. Researchers took 464 children with sleep apnoea and randomly assigned half to have their tonsils and adenoids removed, while the other half were simply monitored for 7 months. The results were striking. 79% of the children who had surgery saw their sleep normalise, compared to 46% who improved on their own. Parents reported significant improvements in their children's behaviour, ability to focus, and overall quality of life. There was one nuance: on formal attention tests given in a clinic, the surgery group didn't score significantly better. But every measure that parents reported — behaviour at home, ability to manage emotions, and daily functioning — showed clear improvement. For parents, the message is straightforward: removing the physical blockage to their child's airway made a real, noticeable difference in how their child acted, felt, and lived day to day.
Breastfeeding Duration and Its Effects on Jaw Growth and Dental Arch Development
This population-based study followed nearly 1,300 children from birth to age five, tracking both their breastfeeding history and their dental development. The results were clear: feeding patterns in early childhood were associated with later dental arch and occlusal development. Breastfeeding requires the tongue to press up against the palate in a wave-like motion — the exact movement pattern that stimulates the upper jaw to grow wide and forward. Bottle feeding bypasses this mechanism entirely, requiring a completely different (and less developmental) sucking pattern. Children who breastfed for longer had wider palates, fewer crossbites, and better alignment of their teeth. The mechanism is simple: the tongue is the body's natural palatal expander, and breastfeeding is nature's way of training it to do its job. When we replace that with a bottle, we remove the developmental stimulus at the exact moment it matters most.
Rapid Maxillary Expansion as Treatment for Resistant Otitis Media with Effusion
Any parent who has dealt with chronic ear infections knows the drill: antibiotics, then more antibiotics, then the ENT suggests ear tubes. But this study tried something different — widening the palate instead. The children in the study all had two things in common: a narrow upper jaw and persistent fluid behind the eardrums that wouldn't go away. At the start, 73% of their ears weren't draining properly. After having their palate expanded with a dental device, nearly 70% of those ears recovered normal function — without surgery, without tubes. The connection? A narrow jaw affects the shape of the tubes that drain the middle ear. When you widen the jaw, you restore the geometry those tubes need to work properly. The researchers went as far as recommending palatal expansion as a first-line treatment before ear tubes for children with narrow jaws — a recommendation that could spare many children an unnecessary surgery.
Orofacial Myofunctional Therapy and Its Effect on Tongue Posture and Swallowing
Myofunctional therapy is, in essence, physiotherapy for the face and tongue. It involves a series of exercises designed to retrain the muscles of the mouth and throat — particularly the tongue — to function the way they were designed to. This meta-analysis looked at nine studies and found something remarkable: simply exercising the tongue and retraining its resting position cut sleep apnoea severity in half for adults and by nearly two-thirds for children. No surgery. No devices. Just teaching the body to hold its own airway open. The mechanism is straightforward. During sleep, the muscles relax. If the tongue habitually rests low in the mouth (a "low tongue posture"), it falls backward and blocks the airway. Myofunctional therapy trains the tongue to rest on the palate — which is where it was always supposed to be. When the tongue is up, the airway stays open. This evidence bridges the gap between "Space to Swallow Well" and "Space to Breathe Well" — because swallowing correctly and breathing correctly are, in the end, the same structural challenge.
Paediatric Maxillary Expansion and Nasal Breathing: A Systematic Review
This review looked at 12 studies involving over 300 children who had their palate widened using an expander — a dental device that gradually pushes the upper jaw wider. The question was simple: does widening the palate help a child breathe through their nose? The answer was unanimous. Every single study found that children breathed better through their nose after palatal expansion. Air resistance dropped, and airflow increased by a meaningful amount. Why does this work? Because the roof of the mouth is also the floor of the nose. When you widen the palate, you're physically opening up the nasal passages at the same time. It's one of the clearest examples of how dental treatment and breathing are connected — and why treating the structure of the face can solve problems that nasal sprays and allergy medications never will.
Does Ankyloglossia Surgery Promote Normal Facial Development?
"Tongue-tie" is when the strip of tissue under a baby's tongue is too short or tight, restricting the tongue's movement. Most parents hear about it in the context of breastfeeding difficulties. But this review of 7 studies and over 1,400 people reveals a bigger picture: tongue-tie can affect how the entire face develops. Children with tongue-tie consistently showed narrower jaws — both top and bottom — compared to children without it. They were also more likely to have bite problems and crowded lower teeth. The reason comes down to physics. The tongue is supposed to rest against the roof of the mouth, and that gentle upward pressure helps the palate grow wide and flat. A tied tongue can't get into position, so the palate stays narrow and high — leading to a cascade of problems with breathing, dental alignment, and speech. About 8% of babies are born with tongue-tie. The implication is clear: early assessment isn't just about feeding — it's about giving the face the best chance to grow properly during the years when it matters most.
Tongue-Tie and Its Impact on Breastfeeding, Speech, and Orofacial Development
The tongue is not just for tasting food — it is the primary driver of upper jaw development. Every time we swallow (and we swallow over 2,000 times per day), the tongue presses up against the palate. This constant pressure is what stimulates the maxilla to grow wide and forward. A tongue-tie is a physical restriction: a band of tissue under the tongue that prevents it from reaching the roof of the mouth. When the tongue can't get to the palate, the palate doesn't expand. The result is a narrow jaw, crowded teeth, and a compromised airway — all from a small piece of tissue that could be released in minutes. This prospective cohort study found significant breastfeeding improvements after tongue-tie and/or lip-tie release in symptomatic breastfeeding dyads, including improved self-efficacy, lower nipple pain, lower reflux scores, and higher measured milk intake. The broader developmental implications still need careful study, but the infant-feeding signal is clinically relevant because tongue mobility and oral function begin shaping habits early.
Adenotonsillectomy Outcomes in Treatment of Paediatric Obstructive Sleep Apnoea
Removing the tonsils and adenoids is the most common surgery for childhood sleep apnoea. But how well does it actually work? This study followed 578 children across eight sleep centres to find out. The good news: surgery dramatically reduced the number of times children stopped breathing per hour of sleep — from about 18 to about 4. That's a major improvement for most families. The important caveat: only 27% of children were completely cured. The rest still had some degree of sleep apnoea after surgery — especially children over 7 and children who were overweight. Their tonsils and adenoids were gone, but the underlying problem — a jaw and face that hadn't grown large enough — was still there. This doesn't mean surgery isn't worth it. For many children, it makes a huge difference. But it does mean that tonsil removal alone isn't always enough. The structure of the face itself — the size of the jaw, the width of the palate — may need to be addressed as part of a complete treatment plan.
The Difficult Question
Why do we treat speech and swallowing as isolated problems instead of recognising the structural root cause?