After use of 6 mm profile drill, a 4.5x4(3 (longer cuff)) mm abutment is able to be seated apparently completely without a gap (Fig.6 <).  The third round of bone graft (Fig.6 *) is placed around the abutment to make sure that the underlying implant is fully covered to reduce periimplantitis in the future.  The bone graft around the abutment disappears most coronally, while that around the implant remains 4 months postop (Fig.7).  The implant is stable.

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Xin Wei, DDS, PhD, MS 1st edition 06/01/2020, last revision 06/02/2020