Fixture mount is used to place a 4x10 mm implant at #13 and stays as an anchor pin while osteotomy and sinus lift are being conducted at #14 (Fig.2).  In fact there is discrepancy in depth using the guide.  For example the last drill for osteotomy is 4.5x7.3 mm according to design, whereas 4.5x11.5 mm drill has to be used before the sinus floor has small area of perforation without sinus membrane breakage.  Autogenous bone harvested from the osteotomy, PRF membrane and a 4.5x10 mm dummy implant are used for sinus lift (Fig.2).  The placement depth of the implant at #13 has to be adjusted multiple times until satisfaction (Fig.2-5). <: exposed thread.  The mesial crestal bone is trimmed with bone profile drill at #13 before placement of a 5.5x6 mm healing abutment.

Depth Last Next Xin Wei, DDS, PhD, MS 1st edition 08/06/2019, last revision 09/21/2019