The patient is doing fine postop, although the implant is not stable with mild tenderness.  Six month post-implantation, the implant appears to have been descended (Fig.9, compare to Fig.7).

Following local anesthesia, the failing implant is removed without resistance.  The sinus floor is present.  The lateral walls are intact, although probably short.  A series of rounded tapered osteotomes (2-5 mm in diameter) are used for sinus lift at the depth of 14 mm.  A 4.5x14 mm tap is inserted (Fig.10).

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Xin Wei, DDS, PhD, MS 1st edition 04/20/2013, last revision 10/21/2014