The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural anomaly of the specialized tissues that both surround and support the teeth, maintaining them in the maxillary and mandibular bones; it consists of four principal components: the gums (gingiva), periodontal ligament, cementum, and alveolar bone proper