title: [Clinical analysis of simple hypodontia].
abstract: OBJECTIVE
  To compare and analyse the distribution and characteristic of born missing teeth.
  
  
  METHODS
  A total of 183 simple hypodontia patients was reviewed and statistically analysed.
  
  
  RESULTS
  There was no significant difference in the number of missing teeth between different sexs (P > 0.05), and there was also no significant difference in the number of missing teeth among different sites (maxilla, mandible or left and right sides) (P > 0.05). The mandibular second premolar was the most frequently missing tooth. The missing molars were more commonly seen in oligodontia patients who had six missing teeth or beyond than hypodontia patients with less than six missing teeth (P < 0.05).
  
  
  CONCLUSIONS
  Each hypodontia patient has his own clinical manifestation, and appropriate treatment should be planed accordingly for these patients.
authors.affiliation: Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Jun-Xia
authors.initials: JX
authors.lastname: Zhu
authors.forename: Shu-Guo
authors.initials: SG
authors.lastname: Zheng
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Ge
mesh_terms: D000848:Anodontia / Q000453:epidemiology*; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D008297:Male