Maxillary hypoplasia, or maxillary deficiency , is an underdevelopment of the bones of the upper jaw. It is associated with Crouzon syndrome , Angelman syndrome ,  as well as fetal alcohol syndrome. It can also be associated with cleft lip and cleft palate. Some people could develop it due to poor dental extractions. The underdevelopment of the bones in the upper jaw, which gives the middle of the face a sunken look. This restriction can also lead to sleep apnea and snoring.
Maxillary hypoplasia, which is also called maxillary deficiency, is the underdevelopment of bones in the upper jaw. This condition produces midfacial retrusion and creates the appearance of protuberance where the lower jaw juts forward. It is often associated with Crouzon syndrome, Angelman syndrome in addition to fetal alcohol syndrome. It may also be associated with a cleft lip and cleft palate. Some people can also develop maxillary hypoplasia due to poor teeth extractions. Maxillary hypoplasia creates the appearance of the patient having a large chin because of their smaller upper jaw. This condition also results in an underbite, which can impact chewing, breathing, speech and overall long-term oral health.
Treatment of midfacial hypoplasia in syndromic and cleft lip and palate patients by means of a rigid external distractor RED. Figueroa IV. Contact address. The rigid external distraction device RED is successfully used to advance the maxilla and all the maxillary-orbital-frontal complex monobloc in children, adolescents and adults.
Midface hypoplasia or retrusion remains a persistent feature of syndromic craniosynostosis years after successful treatment of the cranium. Although expansion of the cranial vault in infancy by traditional fronto-orbital advancement, posterior expansion, or both, can treat the immediate intracranial constriction, midface hypoplasia and its stigmata of exorbitism, sleep apnea, central face concavity, and malocclusion remain suboptimally treated. Initial enthusiasm for the procedures was tempered due to a high rate of infectious complications; timing and indications for surgery continue to stir controversy.