Normal breathing is Silent, day and night Nasal- at rest and with exercise efficient, satisfying Soft, easy and medication free. Mouth breathing appears harmless, unassuming, benign, and unsuspecting form of breathing. For many, breathing is breathing and it has no relevance whether it is from the mouth or nose. In fact, many will agree that one can get more air from the mouth than through the nose and therefore, it is more efficient. Understandably, the debilitating effects of mouth breathing may not be widely accepted. Never the less, it needs to come out.
The human body breathes through the nose. Allergies cause the inside of the nose to swell and block the airway. The body then switches to mouth breathing for oxygen but the mouth makes a terrible noise. Nasal blockage forces the mouth to stay open to breath. If the mouth constantly stays open then the teeth stop fitting together.
Mouth breathing from allergies in children can be disastrous. The jaws don't grow together and a malocclusion develops. The head rotates backward to make it easier breath but the rotation causes the eyes to rotate upward. To prevent this, the patient throws the head forward and becomes chicken necked (forward head posture). This problem causes the patient to have a constant dry mouth, especially in the morning. The forward head posture causes the collar bones to wing upward and forward. The shoulders roll forward too. Normal collar bones are horizontal. Winged clavicles are a sign of severe allergies, mouth breathing and future neck and back problems. Eventually the patientlearns to keep the tongue low to avoid blocking the air coming through the mouth. If the tongue continues to stay low for years a number of problems result.
Purification of the inspired air:
The nasal airway filters heat and humidifies the air in preparation for entry into the bronchi and lungs.
The functional airway also creates a proper amount of nasal resistance so that the diaphragm and intercostals muscles must perform word to create the negative pressure to promote airflow into the lung. With oral respiration the resistance is lacking and poor pulmonary compliance is seen. This gives the appearance of a pigeon chest.
Lubrication of esophagus:
Since the esophagus contain no mucous glands, the mucus from the nose and pharynx serves to lubricate the esophagus. In mouth breathes the oral pharynx is dry and the mucous collects often to de expectorated. This denies the esophagus essential lubrication and can produce a low grade esophagitis.
Blood gas constituents:
Blood gas studies reveal that mouth breathers have 20% more carbon dioxide and 20% less oxygen in the blood.
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