When the third tooth is removed, it is smaller than expected.  Intraop X-ray reveals a normal sized 3rd molar in situ (Fig.2 ^).  Therefore the microdontia removed is a supernumerary tooth.  The tooth #16 is then extracted. 

Diagnosis     Last     Next   Xin Wei, DDS, PhD, MS 1st edition 05/14/2020, last revision 05/16/2020