title: Assessment of hypodontia in the Turkish patients referring to the orthodontic clinic: A retrospective study.
abstract: OBJECTIVE
  The aim of this retrospective study was to assess the prevalence and distribution of hypodontia in the permanent dentition in a sample of Turkish patients who referred to the Ankara Dental Hospital for orthodontic treatment.
  
  
  METHODS
  The pre-treatment orthodontic records of 2530 patients, 1382 girls (54.62%) and 1148 boys (45.38%) between the chronological ages of 7 and 16 years, were examined for evidence of hypodontia. The third molars were excluded in this study.
  
  
  RESULTS
  The prevalence of hypodontia in the inspected population was 5% (3.05% for girls, 1.95% for boys). The average number of the congenitally missing teeth per patient was 2.03 (1.08 for girls, 0.95 for boys). The prevalence of the congenitally missing permanent teeth was 34% for the upper laterals, 30% for the lower second premolars, 12.5% for the upper second premolars and 23.5% for the other teeth. Most patients with hypodontia (84.9%) (57.13% for girls, 27.77% for boys) had got missing either one tooth (45.23%) or two teeth (39.67%).
  
  
  CONCLUSIONS
  The prevalence of hypodontia in girls was higher than in boys in this sample of the Turkish patients. The upper laterals and lower second premolars were consecutively the most symmetrically absent teeth. The prevalence of advanced hypodontia was lower than single and symmetrical hypodontia.
authors: Department of Orthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkiye.
authors: Deniz
authors: D
authors: Uzuner
authors: Orthodontist, Orthodontic Clinic of the Ankara Dental Hospital, Ankara, Turkiye.
authors: Meltem Melik
authors: MM
authors: Celik
authors: Department of Orthodontics, Faculty of Dentistry, Inonu University, Malatya, Turkiye.
authors: Ebubekir
authors: E
authors: Toy
authors: Orthodontist, Private Practice, Ankara, Turkiye.
authors: Candan Okay
authors: CO
authors: Turkdonmez
keywords: Congenital agenesis; hypodontia; missing teeth; orthopantomograms