It appears that the existing abutment at #15 is incompletely seated (Fig.3). After use of 5.5 and 6.0 mm bone profile drills, a 5x4(3) mm abutment is placed with 35 Ncm torque. In fact the bone graft coronal to the implant remains (Fig.9 *) in spite of apparent loss of the overlying PRF and GEM cap (Fig.8). The sticky bone is retentive.
Xin Wei, DDS, PhD, MS 1st edition 05/21/2020, last revision 05/21/2020