Tooronga Family Dentistry in Glen Iris

Family dental care in Glen Iris

Mouth Breathing and Its Impact on Dental Development in Glen Iris

When we are born, our natural instinct is to breathe through the nose. The nasal passages filter, warm, and humidify air before it enters the lungs. However, when nasal obstructions occur, breathing shifts from the nose to the mouth. While this may begin as a temporary adaptation, prolonged mouth breathing can have lasting effects on both oral and facial development.

How Mouth Breathing Affects Jaw and Facial Growth

When the nose is underused, its structures do not develop properly. The same applies to the upper jaw, which becomes narrow and underdeveloped. As a result, the upper jaw may appear sunken, and the lower jaw tends to hang open so air can pass through more easily. Over time, this posture weakens facial muscles and elongates the lower facial structure.

The Role of the Tongue

The tongue greatly influences how the upper jaw and base of the skull develop. Ideally, the tongue should rest against the roof of the mouth during both rest and swallowing.

In mouth breathers, however, the tongue remains at the floor of the mouth and does not make contact with the palate. This absence of upward pressure leads to inadequate upper jaw growth and commonly results in bite misalignment and crowded teeth, particularly in children.

Long-Term Consequences

If mouth breathing persists, it can permanently alter the shape of the face and dental arches as a child matures. These structural changes often cause functional issues such as difficulty breathing through the nose, speech challenges, and an increased risk of orthodontic problems.

Early identification and intervention are crucial to prevent these effects from becoming permanent.

Treating Mouth Breathing Early

Mouth breathing should be addressed in childhood through a combination of dental, orthodontic, and medical approaches. Treatment may include:

  • Identifying and removing nasal or airway obstructions

  • Encouraging proper tongue posture and nasal breathing habits

  • Orthodontic therapy to guide jaw and bite development

If you or your child are mouth breathers or have misaligned teeth, it is important to have the condition assessed as early as possible. For professional evaluation, ask Dr. Kaufman or schedule an appointment for a consultation.