title: Prevalence of hypodontia and hyperdontia in paedodontic and orthodontic patients in Budapest.
abstract: Various publications have reported the prevalence of accessory teeth to be between 1 and 3%. In contrast, hypodontia has a much higher prevalence. In the current work, the authors studied OP radiographs on 2,219 patients aged 6 to 18 years who presented at the Department of Paedodontics and Orthodontics at Semmelweis University in Budapest (patients with systemic disease were excluded). The examined radiographs revealed a prevalence of accessory teeth of 1.53%. The sequence of prevalence was as follows: mesiodens > second incisor > first incisor. 77.5% of the accessory teeth were located in the upper jaw, with 97.5% of those being present in the incisor region. Hypodontia was detected in 326 patients (14.69%); missing wisdom germs were not considered. The sequence of prevalence of missing germ was as follows: upper second incisor > lower second premolar > upper second premolar > lower first incisor. Hypodontia in the molar region was observed in 15 cases (0.68%). The prevalence of oligodontia was 1.04%.
authors.affiliation: Department of Paedodontics and Orthodontics, Semmelweis University, Budapest, Hungary. gabris@gyfog.sote.hu
authors.forename: Katalin
authors.initials: K
authors.lastname: Gábris
authors.forename: Gábor
authors.initials: G
authors.lastname: Fábián
authors.forename: Miklós
authors.initials: M
authors.lastname: Kaán
authors.forename: Noémi
authors.initials: N
authors.lastname: Rózsa
authors.forename: Ildikó
authors.initials: I
authors.lastname: Tarján
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000453:epidemiology*; D002648:Child; D005260:Female; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D008297:Male; D015995:Prevalence; D017678:Sex Distribution; D014096:Tooth, Supernumerary / Q000453:epidemiology*