The lower wire dislodges from the 2nd molar bands twice in 2 weeks; it appears that LR3 has been distalized (Fig.4); to reduce the chance of wire displacement, power chains x 5 are to be placed and in LL 3-7 as well (better anchorage, especially for the upper).
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Xin Wei, DDS, PhD, MS 1st edition 09/19/2017, last revision 11/23/2019