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Two weeks later, it appears that U3s do not move distal (Fig.10,12), whereas the lower teeth do (Fig.11,13). Power chains change to 2 with grey ones. If no more change occurs in 1 week, change to next wires with power chains x 4 with one end attached to the lingual cleat (Fig.10,12 arrowheads) so that U3s may evenly (buccal and palatal) move distal. If LL3 keeps moving much faster than LR4, switch the closed coil springs.
Xin Wei, DDS, PhD, MS 1st edition 03/29/2015, last revision 01/02/2021