The depth is controlled by drill stopper (Fig.5 S).  Finally a 5x12 mm implant is apparently safely placed (Fig.6).  Red dashed line: the superior border of the Inferior Alveolar Canal.

There is no bone loss around the implant 3 months postop (Fig.10 (H: healing abutment).

Safety Measures

Xin Wei, DDS, PhD, MS 1st edition 07/31/2015, last revision 08/01/2015