The abutment screw is retightened 2 months post cementation while #30-32 FPD is sectioned for #31 implant.  In fact the abutment is incompletely seated with gaps vertical (Fig.4 *) and horizontal (<).

Depth Control Last Next  Xin Wei, DDS, PhD, MS 1st edition 11/20/2020, last revision 01/31/2021