Mesiodens 2011-03-10T02:38:59Z SNOMEDCT_US:17802000 A mesiodens is not a supernumerary incisor (i.e., it does not have the morphology of an incisor). Rather, it is a conoid, extra tooth located between the maxillary central incisors. Mesiodens is the most common supernumerary tooth. Typically, they are small. They are usually conical in shape but may have heterogeneous forms. Mesiodens may remain unerupted and cause failure of a permanent incisor to erupt. Mesiodens may develop in an inverted position. Midline supernumary tooth Extra tooth in the midline UMLS:C4280340 Mesiodentes UMLS:C0040457 Median supernumary tooth HP:0011067 Extra tooth SNOMEDCT_US:266414008 A supernumerary tooth in the midline between the maxillary central incisors. SNOMEDCT_US:8666004 SNOMEDCT_US:367534004 UMLS:C0266030 Supernumerary tooth