The pains persists 1 month post RCT and 6 months post implant placement (3 months post cementation).  RCT retreatment is initiated (Fig.11,12) with placement of Calcium Hydroxide paste after redebridement with 30/.04 rotary file at 23.5 mm (.5 mm longer than the earlier RCT, Fig.13). Note bone growth between the implant threads (Fig.13).  Tap Last Next Xin Wei, DDS, PhD, MS 1st edition 03/01/2018, last revision 08/19/2018