title: Congenitally missing maxillary primary canines: report of three cases.
abstract: BACKGROUND
  Hypodontia is uncommon in the primary dentition and lateral incisors are the most commonly missing primary teeth in the patients affected. Studies have found that hypodontia in the primary dentition involving only maxillary canine is rare.
  
  
  METHODS
  Three cases of hypodontia in the primary dentition involving only maxillary canine are presented. Two of them were affected by hypodontia and hyperdontia in the permanent dentitions respectively, yet all the permanent canines developed normally in these three cases.
  
  
  CONCLUSIONS
  In children with congenitally missing maxillary canines, the permanent dentitions may show diverse anomalies in tooth numbers, ranging from hypodontia to hyperdontia.
authors.affiliation: School Dental Care Service, Department of Health, Hong Kong. rony_cho@dh.gov.hk
authors.forename: S Y
authors.initials: SY
authors.lastname: Cho
authors.forename: C K
authors.initials: CK
authors.lastname: Lee
mesh_terms: D000848:Anodontia / Q000175:diagnosis*; D001641:Bicuspid / Q000002:abnormalities; D002648:Child; D003481:Cuspid / Q000002:abnormalities*; D003818:Dentition, Mixed; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla; D014094:Tooth, Deciduous / Q000002:abnormalities*; D014096:Tooth, Supernumerary / Q000175:diagnosis