The patient complains of food impaction nearly 1 year post cementation.  The mesial and distal contacts of #30 crowns are light.  When the abutment/crown is removed, there is implant well contamination (food debris).

It appears that the previous abutment (5.7x4(2) mm, Fig.6,7) is incompletely seated.  When a smaller abutment is placed and torqued at 30 Ncm, it is seated fully (Fig.9 (<: no gap)).  New impression is taken.  If there is food impaction distal to the new crown, the distal crestal bone should be removed, followed by lab closure of the embrasure.

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Xin Wei, DDS, PhD, MS 1st edition 02/22/2020, last revision 02/22/2020