molar tooth molar tooth 3 molar 3 NCIT:C60732 Wikipedia:Wisdom_tooth UBERON:0018377 third molar tooth molar 3 tooth SCTID:181222005 FMA:321612 wisdom tooth A wisdom tooth is in humans any of the usually four third molars, including mandibular third molar and maxillary third molar. Wisdom teeth usually appear between the ages of 17 and 25. Most adults have four wisdom teeth, but it is possible to have morebin which case they are called supernumerary teethbor fewerba condition called hypodontia. Wisdom teeth commonly affect other teeth as they develop, becoming impacted or 'coming in sideways'. They are often extracted when this occurs. MESH:D008964 The molar tooth of the upper or lower jaw that is phylogenetically number 3.