Source:http://linkedlifedata.com/resource/umls/id/C0040457
MSH: An extra tooth, erupted or unerupted, resembling or unlike the other teeth in the group to which it belongs. Its presence may cause malposition of adjacent teeth or prevent their eruption.,HL7V3.0: <p>Supernumerary tooth, any tooth in addition to the normal permanent and primary dentition</p>