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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.
Term:Oligodontia
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Accession:HP:0000677 term browser browse the term
Definition:The absence of six or more teeth from the normal series by a failure to develop.
Comment:The diagnosis of oligodontia requires a radiograph, as is true for anodontia and for the other designation of tooth agenesis, hypodontia. The terms hypodontia and oligodontia are sometimes used interchangeably in the literature while on other occasions hypodontia is used for selective agenesis of six or less missing teeth while oligodontia is applied when there are more than six missing teeth. Tooth agenesis or oligodontia/hypodontia can be mistaken for delayed eruption and again a radiograph is needed for diagnosis. Absence of teeth may be congenital (tooth agenesis) or acquired. The incidence of congenital absence of teeth is different depending on the type and position of the tooth [Gorlin et al, 2001].
Synonyms:exact_synonym: Failure of development of more than six teeth;   Partial anodontia
 related_synonym: Missing more than six teeth;   Number of teeth decreased by more than six
 alt_id: HP:0000702
 xref: UMLS:C4082304;   UMLS:C4280619


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of head or neck 0
        Abnormality of the head 0
          Abnormality of the face 0
            Abnormality of the mouth 0
              Abnormal oral morphology 0
                Abnormal oral cavity morphology 0
                  Abnormality of the dentition 0
                    Abnormal number of teeth 0
                      Tooth agenesis 0
                        Oligodontia 0
                          Oligodontia of primary teeth 0
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