title: Prevalence and intra-oral distribution of agenesis of permanent teeth among Eastern Turkish  children.
abstract: OBJECTIVE
  The aim of this study was to describe agenesis of permanent teeth, excluding the third molars, in a sample of  children in Eastern Turkey.
  
  
  METHODS
  This retrospective study assessed 1,291 digital  orthopantomograms (OPT) (678 males and 613 females), taken at the Faculty of Dentistry, Ataturk University, Erzurum. The  chi-square test was used to compare maxillary and mandibular hypodontia in males and females.
  
  
  RESULTS
  Eighty children  were found to have at least one tooth absent from their permanent set of teeth. The prevalence of tooth agenesis was  6.2%. A total of 135 permanent teeth were missing as a result of the congenital condition. Tooth agenesis was found  more frequently in females than in males. Although there was no significant difference between genders in the prevalence of  hypodontia among the children (p>0.05), the difference between genders in children who had congenitally missing teeth  (CMT) reached a statistically significant level (p<0.05).
  
  
  CONCLUSIONS
  When hypodontia in a Turkish paediatric  population was compared to other populations, the characteristics were found to be similar to the Western population.  However, the population in Eastern Turkey differs from the population in Asia, where there is less incisor tooth agenesis and  more second molar tooth agenesis.
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey. k_cantekin@hotmail.com
authors.forename: K
authors.initials: K
authors.lastname: Cantekin
authors.forename: A
authors.initials: A
authors.lastname: Dane
authors.forename: O
authors.initials: O
authors.lastname: Miloglu
authors.forename: F
authors.initials: F
authors.lastname: Kazanci
authors.forename: S
authors.initials: S
authors.lastname: Bayrakdar
authors.forename: M
authors.initials: M
authors.lastname: Celikoglu
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000145:classification / Q000453:epidemiology*; D001641:Bicuspid / Q000002:abnormalities; D002648:Child; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities; D008297:Male; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D015995:Prevalence; D019252:Radiography, Dental, Digital / Q000706:statistics & numerical data; D011862:Radiography, Panoramic / Q000706:statistics & numerical data; D012189:Retrospective Studies; D012737:Sex Factors; D014421:Turkey / Q000453:epidemiology