While 2 mechanisms are applied to gain more space for LR2 (Fig.9 *, ^), a special mechanism is utilized to correct LL2 cross bite (space gained).  The lower canines should not be distalized early.  The central incisors should be anteriorized instead.

2nd Molar Cross Bite Last Next

Xin Wei, DDS, PhD, MS 1st edition 01/08/2018, last revision 09/05/2020