A relatively large 2-piece implant (3.5x13 mm) is placed (Fig.3), but a 4x5.7(2) mm abutment is incompletely seated (<).  Use of 4.6 and 5.6 mm bone profile drills does not appear to solve the problem.  The implant is backed up to the supra-gingival level so that it seems easier physically to insert the same abutment into the implant securely.  Then both of them are torqued into the place together (Fig.4 (no gap)). 

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Xin Wei, DDS, PhD, MS 1st edition 02/11/2020, last revision 02/23/2020