Fig.3: 7 mm tap in place.

A 7x14 mm implant is placed with insertion torque more than 60 Ncm (Fig.4). No bone graft is used for sinus lift considering sinus membrane perforation.  The sinus floor is lifted by bone expansion (using osteotomes and taps) and implant placement (arrowheads).  It appears that some of the base bone is pushed into the sinus.  Retrospectively, the large implant contributes to perioimplantitis.

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Xin Wei, DDS, PhD, MS 1st edition 03/30/2013, last revision 12/09/2018