Facial Growth and Development

Breathing Plays a Significant Role in Facial Development

How breathing affects facial and jaw development

Mouth breathing changes the position of the tongue during rest. If the tongue does not rest along the roof of the mouth in the palate, the tongue is forced to sit low in the mouth, leading to the underdevelopment of the oral musculature.

With the underdevelopment of the face and jaw, physical appearances are altered causing such things as:

  • Long/narrow face and mouth

  • Less defined cheekbones

  • Smaller lower jaw

  • Weak chin

  • Dental crowding

Learn More About Facial Growth and Development ...

Many significant growth and developmental milestones occur during our first 18 months of life. In fact, 60 percent of child’s facial development is completed by age 6, and 90 percent by age 12.

Proper breathing is necessary to our children’s health, development, and educational success. Early detection and correction of airway problems is essential in helping to correct any growth and development issues that may be present before they lead to any more serious comorbidities.

What can influence facial development?

  • Functioning of muscles

  • Proper nutrition

  • Ability to breathe normally

Due to mouth breathing, the upper face doesn’t develop to its full potential, causing midface deficiency. As the tongue rests low in the mouth, it encourages the lower jaw to grow more vertically giving the child a longer face. As this happens it sets the child up for more breathing pattern disorders in the future.

When a person breathes through the mouth, it creates a domino effect throughout the orofacial system. The muscles in the cheeks tighten, applying additional force to both the upper and lower jaws. Exerted consistently over time in a child who is still growing and developing, these forces actually serve to narrow the dental arches and the facial structure itself.


This narrowing also can create a shortage of room in the mouth for the tongue. Rather than rest against the roof of the mouth as intended, the tongue often drops down into the floor of the mouth.

The poor position of the tongue has its own set of consequences. The upper arch can narrow even further, hindering the development of the mid-face. The tongue also could shift back into the airway during sleep, creating the type of obstruction that can precipitate the development of a sleep breathing disorder such as sleep apnea.

A gummy smile is a result a deficient maxilla that grows vertically

No sclera should be showing below the iris. The maxilla makes up a large portion of the orbit of the eyes. When the maxilla is narrow, the soft palate grows vertically pulling the lower muscles of the eyes down and exposing sclera.

With the tongue sitting low, the palate doesn't form a nice U-Shape. A V-Shaped palate forms causing a deficient maxilla and other issues that come along with it.

Nasal Breathing and Facial Growth

Mouth Breathing and Facial Growth

Does your child have signs of potential OMD's?

      • Mouth breathe - lips apart

      • Report being tired all the time

      • Nasal blockage – typically worsens at night

      • Restless sleeper

      • Hyperactive or inattentive

      • Chapped lips

      • Allergies

      • Changes in posture - posturing head forward and or tipping the forehead backwards

      • Tongue-tie or lip-tie

      • Tongue-thrusting

      • Deviated septum


      • Tonsil and adenoid problems – chronic sinus problems, throat problems

      • Snoring – snoring is not natural

      • Loud grinding of teeth during sleep

      • Bed wetting

      • Reflux in the eustachian tube

      • Frequent ear infections

      • Chronic sinus infections

      • Venous pooling beneath the eyes – dark circles beneath the eyes

      • Clenching/grinding

      • Difficulty swallowing

      • Picky/messy eating

How can orofacial myofunctional therapy help?


Myofunctional therapy is best if it can be done at the first signs of problems. Early intervention and correction in children can help guide the face to grow optimally.