The bone graft (Fig.3 *) appears to have attached to the root of the neighboring tooth and the implant threads 7 months post op (COVID 19, Fig.5 arrowheads)).  The bone graft appears to continue to merge with the neighboring root, bone and implant 10 months postop (2.5 months post cementation, Fig.6).

Thickened Sinus Membrane Last Next Xin Wei, DDS, PhD, MS 1st edition 09/14/2020, last revision 09/14/2020