Mouth Breathing

Mouth breathing is widely recognized as a risk factor for altered craniofacial growth in children, often associated with Class II malocclusion, anterior open bite, and posterior crossbite. It can also lead to reduced maxillary arch width and a narrow, high vaulted palate, caused by an altered tongue posture and reduced later forces on the maxilla.¹⁴

Breastfed, verse bottle feed infants develop better lip seal and proper tongue posture, resting on the palate, which in turn promotes nasal breathing patterns and supports proper airway size and function. Studies demonstrate that early life patterns matter the most for proper oral motor function, nasal breathing airway development, and favorable craniofacial growth.¹⁴

Mouth breathing is not just a symptom; it is a bidirectional risk factor in sleep apnea development and progression. Breastfeeding, breathing, and craniofacial development are tightly interconnected.¹⁴