Among the consequences of mouth breathing are alterations in cranio-orofacial growth, speech, nutrition, body posture, sleep quality, and school performance. Overall, the mouth breather presents alterations in posture, tone, and mobility of lips, tongue and cheeks, resulting in less efficiency in stomatognathic functions: chewing, swallowing and speech, flaccid jaw elevator muscles, anterior head posture, maxillary atresia, and speech disorders.