It appears that a 3.8x18 mm  implant is not placed deep enough.  Following 3-4 more turns of the implant and placement of a 5.5x4(3) mm abutment (Fig.5 A), allograft is placed (*).  The bone around the implant appears to have regenerated 4 months postop (Fig.7).

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Xin Wei, DDS, PhD, MS 1st edition 05/08/2017, last revision 09/08/2018