Lingual buttons are placed at L2s for buccalization (Fig.19) and mesialization (Fig.22,23).  It appears that space should be created distal to LR3.  That is that the lower anterior teeth should be shifted to the right, although it may be not appropriate for the midline.

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Xin Wei, DDS, PhD, MS 1st edition 06/29/2019, last revision 03/07/2020