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The bone density of the site is low 4 months post bone graft (Fig.17,18). Use the existing guide, but incision will be made. The osteotomy will be underprep. Take 5x5 cm CT for bone width and height after use of 2.2x7.3 drill with 1 or 2 O-rings. Prepare sinus lift, including water pump and bone graft, especially distal. Place healing screw and suture. Prepare PRFx2.
Xin Wei, DDS, PhD, MS 1st edition 01/29/2020, last revision 02/11/2020