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After crestal incision, a 3.5 or 4 mm trephine bur is used for 2 mm at #14. The regional sinus floor is lifted using a Bicon flat-end osteotome, followed by bone graft and taps. If the 6x11 mm tapered tap does not gain stability (Fig.3), use a 6x11 mm round tap for presumably more surface contact with the native and graft bone (Fig.4).
No matter which implant is placed, sinus lift with bone graft will be done (red circles).
Xin Wei, DDS, PhD, MS 1st edition 05/17/2015, last revision 05/18/2015