What is forwardontics? Forward facial growth explained

Forwardontics describes any treatment that focuses on forward jaw development instead of just straightening teeth. The term was coined by orthodontist Dr. Sandra Kahn as a public-facing name for orthotropics, the approach developed by British orthodontist John Mew.

The core idea: modern jaws are underdeveloped because of how we eat, breathe, and use our mouths, not because of bad genes.

What forwardontics means

Kahn defines forwardontics as a descriptive term that includes all treatments focusing on forward development of teeth and jaws in children and adults.

The treatment approach behind it is orthotropics, developed by Mew in the 1970s. Kahn has stated directly that the two terms are synonymous. She rebranded orthotropics because the original name caused confusion.

Mew's core concept is what he called the tropic premise: resting oral posture shapes how the face grows. Tongue on the palate, lips sealed, teeth in light contact. When this posture is maintained during childhood, the jaws grow forward and wide. When it is not, the face grows long and narrow instead.

Mewing, the self-directed tongue posture practice that went viral on social media, comes from these principles. Mewing is what people do on their own. Forwardontics is the clinical framework Kahn built around it.

Kahn extended Mew's work by connecting jaw development to infant feeding, sleep medicine, and nasal breathing. She developed posture training devices and has published clinical research testing expansion combined with posture retraining.

She also brought institutional weight. Her 2020 paper in BioScience was co-authored with Stanford population biologist Paul Ehrlich, geneticist Marcus Feldman, and neuroscientist Robert Sapolsky. Their argument: the global epidemic of crooked teeth and underdeveloped jaws is not genetic. It is a phenotypic response to industrialization.

The same thesis appears in their 2018 book Jaws: The Story of a Hidden Epidemic, published by Stanford University Press. For most of human history, harder diets, nasal breathing, and functional oral posture produced wide jaws with straight teeth. Modern soft diets, bottle feeding, indoor allergens, and mouth breathing during sleep disrupted the mechanical forces that shaped normal jaw growth. The result is smaller jaws, crowded teeth, and reduced nasal capacity.

How forwardontics differs from traditional orthodontics

Traditional orthodontics treats crooked teeth as a genetic problem. The solution is mechanical: braces reposition teeth, extractions create space, and surgery corrects severe jaw discrepancies. Treatment typically begins after most facial growth is complete.

Forwardontics treats crooked teeth as a postural and environmental problem. The jaws grew wrong because breathing, swallowing, and tongue posture were wrong during development. The solution is to correct posture and guide growth, ideally before growth is finished.

	Traditional orthodontics	Forwardontics
Cause of crooked teeth	Genetic	Environmental and postural
Treatment goal	Align teeth	Guide forward jaw growth
Approach to crowding	Extractions or retraction to create space	Expansion to make room
Treatment timing	After growth (typically teens)	During growth (as early as age 3 to 4)
Posture training	Not part of treatment	Central to treatment
Tooth extraction	Common	Avoided

The theory behind forward facial growth

The most serious scientific foundation for forwardontics is Melvin Moss's Functional Matrix Hypothesis, introduced in the 1960s. Moss proposed that craniofacial bone does not grow on a genetically predetermined schedule. It responds to the functional demands placed on it by surrounding tissues, muscles, and the mechanics of breathing.

Under this model, the tongue acts as a palatal scaffold. When it rests against the roof of the mouth, it exerts gentle outward and upward force on the upper jaw. That pressure guides it to grow wider, which creates more room for teeth and more space for air to move through the nose. The roof of your mouth is also the floor of your nasal passages, so when the palate is narrow, there is less room to breathe through your nose.

When the mouth is open for breathing, the tongue drops. The scaffold disappears. Cheek muscles constrict the arch inward. The lower jaw rotates downward and backward. The face stretches longer. This pattern is measurable. Studies consistently find that chronic mouth breathers develop narrower palates, longer face shapes, and more crowded teeth compared to nasal breathers. A retrospective study of 116 orthodontic patients found posterior crossbite in 49% of mouth breathers versus 26% of nasal breathers.

This is not speculative biology. Mechanotransduction, the process where cells convert mechanical force into biochemical signals that drive bone remodeling, is established science. Orthodontic tooth movement is itself proof that sustained pressure reshapes bone. Forwardontics extends the same logic: if braces can move teeth through bone, sustained tongue pressure during growth can guide the jaw.

The evolutionary argument is where the Jaws thesis becomes difficult to dismiss. Archaeological skull comparisons consistently show that pre-agricultural populations had wide arches with straight teeth. Modern malocclusion rates are far higher. The shift happened too fast to be genetic drift. In roughly 20 generations, crowding went from rare to nearly universal in industrialized populations.

The most plausible explanation is environmental. Softer diets reduced the chewing forces that stimulate jaw growth. Bottle feeding changed infant sucking mechanics. Indoor allergens and congestion promoted mouth breathing. These factors compound across development.

Genetics still play a role. Twin studies show that jaw size runs in families. But whether teeth actually crowd depends heavily on environment. You might inherit a particular jaw, but how you ate, breathed, and used your mouth growing up determined whether your teeth fit inside it. That distinction matters because it means the problem is partly preventable.

What the evidence supports and where it falls short

Several foundational claims behind forwardontics have research support. Others do not.

What holds up

Mouth breathing changes craniofacial development in children. Multiple studies find the same pattern: the lower jaw drops back, the face grows longer, the palate narrows, and the upper teeth push further forward. The relationship is consistent across the literature, though some reviewers caution that vertical growth also has a strong genetic component.

Palatal expansion increases nasal cavity volume. A 2025 systematic review of 12 clinical studies found that widening the palate with expansion devices consistently opened up nasal cavity and upper airway dimensions in children. A separate 2024 meta-analysis reported estimated reductions in sleep apnea severity of approximately 17 events per hour in pediatric patients with moderate to severe obstructive sleep apnea.

Myofunctional therapy, a set of exercises that strengthen the tongue, lips, and throat muscles, reduces sleep apnea severity. A meta-analysis published in SLEEP found that these exercises cut the number of breathing interruptions during sleep by approximately 50% in adults and 62% in children across 11 studies. The exercises, including tongue presses to the palate and lip seal training, are the same movements forwardontics practitioners recommend.

Kahn published a 2026 study in Pediatric Pulmonology comparing two groups of children: one received palatal expansion only, the other received expansion plus her posture training device. The group that combined both slept better across every measure. Less snoring, fewer wakings, lower apnea severity. It was a small study, 34 children at one site, so it needs to be repeated at larger scale. But it is the first controlled evidence that posture training adds something beyond expansion alone.

Where it falls short

The largest study of orthotropic treatment outcomes found no meaningful skeletal difference between treated patients and untreated controls. Mandibular body length increased by approximately 8 millimeters in both groups. The main dental finding was that the treated group's teeth tipped forward, a tooth movement, not a bone change. The researcher concluded that orthotropics does not influence the skeletal pattern differently from normal facial growth.

The American Academy of Orthodontics updated its position in March 2026, explicitly stating there is no evidence to support orthodontic interventions as primary preventive treatments for sleep-disordered breathing. This is not a rejection of forwardontics as a concept. It is an evidence-threshold call. The AAO acknowledges the mechanistic rationale but declines to endorse prevention claims the literature has not yet validated at scale.

Mike Mew, John Mew's son and the most prominent advocate of orthotropics, was struck from the UK dental register in 2024 following findings related to harm posed to child patients in his care. This does not invalidate the theory behind forward facial growth. But it created legitimate institutional distrust that any framework built on orthotropics inherits.

Self-directed tongue posture in adults has no controlled evidence showing skeletal change. The mechanism is plausible based on what is known about bone remodeling, but adult bone responds far less to sustained force than growing bone does. The functional benefits of correct tongue posture, maintaining nasal breathing and supporting lip seal, are real. Bone-level transformation from mewing alone is not supported.

Forwardontics and sleep quality

This is where forwardontics connects to something you can act on now.

Forward facial development produces a wider palate. A wider palate means a larger nasal cavity. A larger nasal cavity means lower resistance to nasal breathing. Nasal breathing during sleep produces nitric oxide, shifts the nervous system toward recovery, and supports the sleep architecture that consolidates memory and repairs tissue.

When mouth breathing disrupts this, the consequences are immediate. The body has to work harder to pull air through, which triggers brief arousals during sleep. Most are too short to remember, but they are long enough to break up deep sleep and REM. Over time, these breathing patterns can reinforce the structural conditions that caused them. People who snore or wake up with dry mouth are often caught in this cycle.

Most discussions about forwardontics focus on structure. Jaw width. Palatal expansion. Clinical imaging. That matters for children during growth. But for adults, structural change is minimal without clinical intervention. What has not changed is the functional side: how you breathe when you sleep.

This is the gap that gets missed. Mewing trains daytime tongue posture. Forwardontics treats structural development clinically. But both approaches leave a hole in what happens during the 7 to 8 hours you spend unconscious. If your mouth opens during sleep, the nasal breathing you trained all day reverses all night.

Mouth taping addresses this directly. It holds the lips together during sleep so nasal breathing continues through the night. It does not fix structure. It does not expand the palate. It is a support tool that maintains the breathing pattern while the structural side, whether through natural adaptation or clinical treatment, develops over time. For the specific outcomes to expect, see the evidence on mouth taping benefits.

What adults can realistically change

For adults, the forwardontics framework matters more for its functional principles than its structural promises.

Functional changes are available at any age. Nasal breathing retraining, myofunctional exercises targeting the tongue and soft palate, and correct resting tongue posture all produce measurable changes in breathing patterns. The SLEEP meta-analysis found these exercises reduced sleep apnea severity by approximately 50% in adults. That is a functional outcome, not a structural one.

Visible changes happen faster than most people expect, but they are not bone changes. Masseter and tongue muscle growth from consistent chewing and tongue posture can change how the jaw looks within months. Soft tissue redistribution and postural correction, especially reduced forward head posture, can alter the appearance of the jawline and neck. These are real changes. They are not skeletal remodeling.

Bone remodeling in adults is minimal without clinical intervention. Adult palatal expansion procedures like MARPE can achieve skeletal changes in cases where the palate is clinically narrow, with studies showing meaningful reductions in sleep apnea severity. But these require orthodontic or surgical referral. They are not self-directed practices.

If you are an adult interested in forwardontics principles, the functional benefits are the realistic win. Breathe through your nose. Train your tongue to rest on the palate. Build jaw strength through harder foods. These habits affect sleep and recovery now. They will not restructure your skeleton. If you are not sure whether you mouth breathe at night, there are reliable signs to check for. Before trying mouth tape, review the safety considerations.

Bottom line

Forwardontics names a real problem. Modern jaws are smaller and more crowded than they were for most of human history, and the evidence points to environment as the primary driver.

The clinical evidence for forwardontics as a treatment approach is growing but not yet at the level mainstream medicine requires for full endorsement. Kahn's 2026 trial is a start. Larger, multicenter studies need to follow.

For adults, the biggest takeaway is functional. Breathe through your nose. Keep your tongue on the roof of your mouth during the day. And make sure mouth breathing does not fragment your sleep at night.

In healthmaxxing, facial structure sits in the interference layer. A narrow palate or recessed jaw can physically restrict nasal breathing, which fragments sleep regardless of what else you do right. Forwardontics addresses the structural side of that restriction. Mouth taping keeps nasal breathing going at night while the structural side catches up. If you are just starting, the beginner guide covers the right sequence.

Frequently asked questions about forwardontics

What does forwardontics mean?

Forwardontics is a term coined by Dr. Sandra Kahn that covers any treatment focusing on forward jaw development. It prioritizes correcting the causes of underdeveloped jaws, including mouth breathing, poor tongue posture, and soft modern diets, rather than just straightening teeth.

Who created forwardontics?

Dr. Sandra Kahn, an orthodontist and Diplomate of the American Board of Orthodontics, coined the term forwardontics. She developed it as a public-accessible name for orthotropics, the approach created by British orthodontist John Mew.

What is the Jaws book about?

Jaws: The Story of a Hidden Epidemic is a 2018 book by Sandra Kahn and Stanford biologist Paul Ehrlich. It argues that the modern epidemic of crooked teeth and small jaws is caused by environmental and lifestyle changes, not genetics. The forwardontics framework is built on the evidence and theory presented in this book.

Is forwardontics the same as orthotropics?

Forwardontics and orthotropics describe the same approach. Kahn renamed orthotropics to forwardontics to make the concept more accessible to the general public. Both prioritize forward jaw growth through posture correction and early intervention rather than tooth extraction and retraction.

Is mewing part of forwardontics?

Mewing is the self-directed practice of maintaining correct tongue posture, which comes from the same principles that forwardontics formalizes clinically. Mewing is what individuals do on their own. Forwardontics is the broader clinical framework that includes posture training, expansion devices, and early intervention in children.

Does forwardontics actually work?

Parts of the forwardontics framework are supported by research. Palatal expansion improves nasal breathing in children. Myofunctional exercises reduce sleep apnea severity by approximately 50% in adults. But the largest study of orthotropic treatment found no meaningful skeletal difference between treated and untreated groups. The specific clinical claims of forwardontics require more and larger studies.

Is forwardontics scientifically proven?

The individual mechanisms behind forwardontics, including the effects of mouth breathing on facial growth and the effectiveness of myofunctional therapy, are supported by peer-reviewed research. The complete forwardontics framework as an integrated treatment protocol has not been validated by large-scale controlled trials. Kahn's 2026 randomized trial is the strongest clinical evidence so far, but it was small and needs replication.

What is the difference between forwardontics and orthodontics?

Traditional orthodontics treats crooked teeth by mechanically repositioning them, often after growth is complete. Forwardontics treats the underlying cause by guiding jaw growth forward through posture correction, expansion, and breathing retraining during development. The two approaches differ in cause model, timing, and treatment priorities.

Can forwardontics help adults?

Structural jaw changes from forwardontics principles are minimal in adults because bone plasticity decreases significantly after growth. Functional benefits are available at any age. Nasal breathing retraining, myofunctional exercises, and correct tongue posture can improve breathing patterns, reduce snoring, and support better sleep quality regardless of when you start.

How does forwardontics relate to sleep?

Forwardontics addresses the structural and functional conditions that affect nasal breathing, which directly influences sleep quality. A wider palate supports a larger nasal cavity and lower breathing resistance. Nasal breathing during sleep produces nitric oxide, supports nervous system recovery, and reduces the micro-arousals caused by mouth breathing. Mouth taping can help maintain nasal breathing at night as a complement to daytime forwardontics practices like correct tongue posture.