Nose breathing associated with the normal functions of chewing and swallowing and posture of tongue and lips provides correct muscular action stimulating adequate facial growth and bone development . Dentofacial morphology can be altered by dysfunctions, such as nasorespiratory obstruction depending on the magnitude, duration and time of occurrence. When nose breathing is disrupted by adenoid and tonsil enlargement, rhinitis (Nose inflamation), nasal septum deviation, among others, there is a prevalence of mouth breathing. Mouth breathing may lead to postural changes such as lowered position of the mandible, raised position of the head, low posture of the hyoid bone and anterior inferior position of the tongue. It has also been shown that such postural changes may be related to specific dentofacial characteristcs and morphological changes. There is much evidence that mouth breathing produces deformities of the jaws, inadequate position or shape of the alveolar process and malocclusion and results in the development of “adenoidal facies” or “long face syndrome”

The treatment of upper airway obstruction requires proper diagnosis first to find out where in the airway track is the problem and then correct that. The most qualified profession to do that is an ENT medical specialist (ear, nose and throat doctor). the dental deformitis already established has to be corrected by a dentist trained in dental orthopedics.