The implant crown has been loose for several months during the pandemic before he returns 2 years 7 months post cementation.  In fact the abutment has been not seated completely (from Fig.3 to 9).  The crown/abutment is removed from the mouth; the crown is sectioned and separated from the abutment; the latter is reseated, but incompletely (Fig.10 <).  With suspicion of the mesial crestal contact, profile drills 4.6 and 5.5 mm are used without effect.  A new (old probably being worn) and longer (easy to turn in the narrow space) abutment is finally seated completely (Fig.11 (no gap)).  After occlusal adjustment, abutment level impression is taken for a new crown.

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Xin Wei, DDS, PhD, MS 1st edition 09/10/2018, last revision 09/10/2020