Impression is taken 7 months postop (Fig.6).  There seems to be no bone loss 23 months post cementation without opposing teeth (Fig.7) in spite of severe periodontitis at #19 (Fig.8).

Bone Graft Covers Implant Threads

Xin Wei, DDS, PhD, MS 1st edition 10/09/2015, last revision 03/17/2018