The buccal fistula of the upper central incisor (Fig.2 *) seems to be less severe than the swelling (arrowheads).  When the crown is removed, the root has a crack line buccally. 

Repair Buccal Defect Internally Last Next

Xin Wei, DDS, PhD, MS 1st edition 03/28/2016, last revision 06/14/2021