Use fixture mount to place #13 implant for 2 purposes.  One is to avoid mesiobuccal deviation during placement; the other is to be used as fixture anchor.  Check whether the sinus floor is perforated after 3.5x10 mm drill.

Depth 1st Last Next Smooth, Precise Placement

Xin Wei, DDS, PhD, MS 1st edition 06/06/2019, last revision 06/20/2019