More bone graft is placed for sinus lift (Fig.2 black arrowheads) before a 5x11.5 mm UF implant is placed with insertion torque between 35 and 50 Ncm. 

While the volume of the sinus lift reduces 4.5 months postop (Fig.5 black arrowheads), the sinus floor decreases in the density (white arrowheads, possibly due to loss of blood supply directly from the periosteum).

Sinus Lift

Xin Wei, DDS, PhD, MS 1st edition 05/15/2016, last revision 05/15/2016