When a smaller abutment is seated (Fig.10: PA), there appears to be a horizontal gap, whereas there is no vertical one.  With suspicion, BW is taken for the implant at #4 immediately before cementation (Fig.13).  It appears that the abutment is most likely seated completely.

Autogenous Bone     Last     Next  Xin Wei, DDS, PhD, MS 1st edition 10/05/2020, last revision 10/05/2020