Primary stability of a definitive 4.5x9 mm implant is satisfactory (Fig.3), but after initial bone graft, a 5x5.7(4) mm abutment is unable to be seated completely (<).  Following 4.6 and 5.6 mm bone profile drills, the abutment remains incompletely seated (Fig.4).  Bone graft appears to interfere with abutment seating.  From now on, place abutment first, take PA for seating confirmation and then bone graft.

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