It is best to change the trajectory as early as possible, e.g., after taking the first intraop PA and withdrawing the expander (Fig.6 black area) and as much as possible (red line; starting new osteotomy).  It is quite similar to immediate implant.

Parallelism

Xin Wei, DDS, PhD, MS 1st edition 07/19/2015, last revision 07/19/2015