title: An investigation of the association between anterior open-bite and amelogenesis imperfecta.
abstract: Fifty subjects with amelogenesis imperfecta were investigated clinically and with cephalometric radiography in order to determine the prevalence and nature of the anterior open-bite, which has been reported in association with these enamel defects. Anterior open-bite occurred in 24 percent of the subjects and was always associated with a severe discrepancy in the vertical relationship of the jaws. This vertical dysgnathia also occurred in a further 20 percent who did not have anterior open-bite. It is suggested that the frequent association of anterior open-bite and amelogenesis imperfecta is caused by a genetically determined anomaly of craniofacial development, rather than by local factors influencing alveolar growth.
mesh_terms: D000293:Adolescent; D000328:Adult; D000567:Amelogenesis Imperfecta / Q000150:complications*; D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000150:complications* / Q000209:etiology / Q000473:pathology; D008445:Maxillofacial Development