title: Lateral incisor agenesis, canine impaction and characteristics of supernumerary teeth in a South European male population.
abstract: OBJECTIVE
  To assess the prevalence of lateral incisor agenesis impacted canines and supernumerary teeth in a young adult male population.
  
  
  METHODS
  The panoramic radiographs of 1745 military students (mean age: 18.6 ± 0.52 years) who attended the Center of Aviation Medicine of the Armed Forces of Greece during the period 1997-2011 were initially analyzed for lateral incisor agenesis by two observers. After exclusion of the known orthodontic cases, a subgroup of 1636 examinees (mean age: 18.6 ± 0.44 years) was evaluated for canine impaction and supernumerary teeth.
  
  
  RESULTS
  Twenty-eight missing lateral incisors were observed in 22 military students, indicating an incidence of 1.3% in the investigated population. No lateral incisor agenesis was detected in the mandibular arch. A prevalence rate of 0.8% was determined for canine impaction in the sample of young adults. The majority of impacted teeth (86.7%) were diagnosed in the maxillary arch. Thirty-five supernumerary teeth were observed in 24 examinees (prevalence rate: 1.5%). The ratio of supernumerary teeth located in the maxilla versus the mandible was 2.2:1. The most common type of supernumerary tooth was the upper distomolar.
  
  
  CONCLUSIONS
  The prevalence of lateral incisor agenesis, canine impaction, and supernumerary teeth ranged from 0.8 to 1.5% in the sample of male Greek military students.
authors.affiliation: Department of Oral Medicine and Pathology, 251 Hellenic Air Force VA General Hospital, Athens, Greece.|Department of Oral Surgery and Stomatology, University of Bern, Bern, Switzerland.
authors.forename: Konstantina
authors.initials: K
authors.lastname: Delli
authors.affiliation: Department of Orthodontics, 251 Hellenic Air Force VA General Hospital, Athens, Greece.|Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland.
authors.forename: Christos
authors.initials: C
authors.lastname: Livas
authors.affiliation: Department of Oral Surgery and Stomatology, University of Bern, Bern, Switzerland.
authors.forename: Michael M
authors.initials: MM
authors.lastname: Bornstein
keywords: Canine impaction; lateral incisor agenesis; prevalence; supernumerary teeth; young male adults