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The socket is large with sinus floor having pointed perforation. The latter is enlarged with rounded tapered Tatum osteotomy 2-4 mm, followed by tapered and then rounded taps. A 6.8x14 mm rounded tap has barely enough stability (Fig.3). Following placement of 2 PRF plug and 2 PRF membranes and allograft/Osteogen, a 8x17 mm cylindrical implant is placed with 60 Ncm (implant machine reading), however the implant is unstable (Fig.4). More graft is placed around the implant. With placement of 6x3 mm abutment, an immediate provisional is fabricated to close the socket.
Xin Wei, DDS, PhD, MS 1st edition 05/02/2017, last revision 07/01/2018