When the patient returns, you will be surprised to find the alignment (Fig.3; 4.5 months post bracketing, 16x16 ss wires).  The upper and lower midlines (dashed lines) coincide.  The overjet allows to retract the upper anteriors.

2 Bi Extraction Ortho

Xin Wei, DDS, PhD, MS 1st edition 07/29/2015, last revision 07/29/2015