A 61-year-old man develops pain 9 years post complicated RCT (Fig.1).  Section the crown to check whether the distal margin is restorable.  Remove the mesial root to determine whether the distal one is salvageable or not.  If not, place a 5x15 mm bone-level implant with guide.

Crestal Bone Last Next Xin Wei, DDS, PhD, MS 1st edition 05/09/2019, last revision 05/09/2019