Osteotomy is initiated in the middle of the septum (Fig.5 S).  In fact, it should have been distal ~ 1 mm because of differential bone thickness.  The last 2 mm osteotomy is too small for the parallel pin (Fig.5' pink dashed line).

Osteotomy Depth Control Last Next

Xin Wei, DDS, PhD, MS 1st edition 10/17/2017, last revision 09/01/2018