title: Prevalence of numeric anomalies in the permanent dentition of patients with Down syndrome.
abstract: The purpose of this study was to evaluate the prevalence of numeric anomalies in the permanent dentition of patients with Down syndrome by means of panoramic radiographs. The sample consisted of panoramic radiographs from 70 subjects. We examined the radiographs to detect hypodontia as well as supernumerary teeth. Our results confirm the high prevalence of hypodontia among patients with Down syndrome (60%), mostly with mild expression. The teeth most often missing were the upper lateral incisors, usually bilaterally, followed by the lower second premolars and upper second premolars. Supernumerary teeth were seen in 6% of the subjects, and the concomitant occurrence of hypodontia and supernumerary teeth occurred in one patient.
authors.affiliation: Department of Oral Pathology, Special Care Dentistry Center, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitária, 05508-900, Brazil.
authors.forename: A G
authors.initials: AG
authors.lastname: Acerbi
authors.forename: C
authors.initials: C
authors.lastname: de Freitas
authors.forename: M H
authors.initials: MH
authors.lastname: de Magalhães
mesh_terms: D000293:Adolescent; D000328:Adult; D000848:Anodontia / Q000150:complications / Q000000981:diagnostic imaging; D001641:Bicuspid / Q000002:abnormalities / Q000000981:diagnostic imaging; D002648:Child; D002675:Child, Preschool; D003481:Cuspid / Q000002:abnormalities / Q000000981:diagnostic imaging; D004314:Down Syndrome / Q000150:complications* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities / Q000000981:diagnostic imaging; D008297:Male; D008963:Molar / Q000002:abnormalities / Q000000981:diagnostic imaging; D011862:Radiography, Panoramic; D014071:Tooth Abnormalities / Q000150:complications* / Q000000981:diagnostic imaging; D014096:Tooth, Supernumerary / Q000150:complications / Q000000981:diagnostic imaging