Allograft is pushed into the sinus before placement of a 8x17 mm implant. The insertion torque is between 15 and 20 Ncm (Fig.4).  Black arrowheads: sinus floor.

The bone looks normal around the implant 4.5 months postop (Fig.7) except buccodistally (white arrowheads).  It appears that the oversized implant aggravates buccal plate defect postop.

Panoramic X-ray is taken 6 months post cementation (Fig.12).  The distobuccal defect seems to persist.

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Xin Wei, DDS, PhD, MS 1st edition 05/08/2015, last revision 04/21/2019