The osteotomy is initiated lingually with a 2 mm pilot drill (stopper set at 8 mm).  The 1st intraop PA is taken with a parallel pin (Fig.1 black line is the mark of 8 mm).  The depth of the osteotomy is 14 mm from the gingival margin (Fig.2) with 3 mm away from the upper border of the Inferior Alveolar Canal (yellow dashed line).

Incomplete Seating

Xin Wei, DDS, PhD, MS 1st edition 04/13/2015, last revision 04/13/2015