It is hoped that Magic Expanders (ME) can enlarge the osteotomy by pushing the buccal and palatal bone plates of the septum outward (Fig.5 (CT coronal section, modified for illustration) arrows). 

The septal bone is dense and the osteotomy is enlarged by alternating use of drills and expanders.  By the time 3.8 mm ME is tapped in (Fig.6 (PA)), the buccal plate of the septum is perforated.  Black dashed line: sinus floor; red one: mesial wall of socket.

Implant Placed in Thin Septum Last Next

Xin Wei, DDS, PhD, MS 1st edition 08/02/2016, last revision 06/03/2018