Fig.4: Immediately post banding and bracketing, .012 niti	Fig.4': One month post banding and bracketing, .014 niti
Fig.4'': Two months post banding, .016 niti	Fig.4''': Two months and half post banding, .016 niti

The upper arch is more rounded one month of orthodontic treatment (Fig.4').  UR1 rotation (Fig.4) is corrected (Fig.4').  The rotation wedge was removed; power chain was placed between U1s to close the diastema and make room for UR2 to move labially. 

If there is a diastema between UL1 and 2 and there is not enough room for UR2 next appointment, consider using power chains between UR1 and UL3 (The statement is proposed on 10/06/2013. Why to involve UL3?).  Did we do it today (11/09/2013, Fig.4'')?  There is a space between UL1 and 2 (<).  The arch wire is not fully engaged in the mesial bracket of the UR2 (^).  Nobody reviewed the case before the last appointment.  We should not miss it again next visit.

In fact, the patient returned earlier, because UL 5 bracket was loose.  There were still spaces among UL 1-3 (Fig.4''': ^).  The arch wire did not engage completely into the mesial slot of UR2 bracket (<).  Therefore, power chains were placed among UR1-UL3 using the latter as an anchorage.  It is hoped that UR2 will get extra space mesially for rotation correction.

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Xin Wei, DDS, PhD, MS 1st edition 10/06/2013, last revision 12/01/2013