The implant is placed ~ 2 mm deeper (Fig.9).  No bone graft is used for sinus lift.  There is no complication.  The sinus floor appears to be repaired 4.5 months postop (Fig.10).  Fig.11 (trimmed from panoramic X-ray) is taken 1 year 7 months post cementation.

When Sinus Membrane is Perforated

Xin Wei, DDS, PhD, MS 1st edition 03/31/2013, last revision 03/13/2016