title: [Individual studies of parent-offspring similarity in Class II division 1 malocclusion].
abstract: OBJECTIVE
  To study the parent-offspring similarity of class II division 1 malocclusion.
  
  
  METHODS
  On the basis of family units, the polygonic curves and superimposed graphs of parents with those of the offspring were compared.
  
  
  RESULTS
  (1) Craniofacial structure of most parents of the class II division 1 patients have class II convex tendency. (2) The curves of the offspring resemble one or two of the parent's in 84% of the families, and the resemblance mainly concentrates in skeleton.
  
  
  CONCLUSIONS
  (1) Class II division 1 malocclusion is characterized by familial aggregativity. (2) High probability of heredity exists in parent-offspring similarity, and we believe that hereditary factors dominate in skeletal area while in dental area there is a higher probability that environmental factors dominate.
authors.affiliation: Department of Orthodontics, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: R
authors.initials: R
authors.lastname: Jiang
authors.forename: M
authors.initials: M
authors.lastname: Fu
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000235:genetics* / Q000473:pathology; D010290:Parents