A 4.5x11 mm tap drill is inserted ~ 7 mm with resistance (Fig.3 T). Part of the sinus floor has been pushed upward (arrowheads).
After 5x11 mm tap, autogenous bone (harvested from reamers and taps) mixed with Osteogen is pushed into the osteotomy and upward. A 5x11 mm implant is placed with > 60 Ncm (Fig.4 I). Arrowheads: sinus lift.
Fig.6: 5 months postop. *: sinus lift.
The crown dislodges 16 months post cementation. In fact the abutment is also loose. The latter is resin bonded, followed by crown cementation (Fig.7).
Xin Wei, DDS, PhD, MS 1st edition 10/30/2014, last revision 08/29/2016