One more PA is taken after using 4.3x11.5 mm drill (for 5 mm implant; Fig.2).  A 5.5x11.5 mm implant is incompletely seated (underprep).  The implant is removed; a 4.8x11.5 mm drill is used for 6-8 mm; the implant is re-seated with >50 Ncm (Fig.3).  There are 1-2 threads exposed lingually.  Later autogenous bone is placed over the exposed threads.

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Xin Wei, DDS, PhD, MS 1st edition 09/10/2015, last revision 05/15/2020