A 12-year-old woman has severe crowding including UL7 impaction (Fig.1-5), finishes non-extraction orthodontics at the age of 15 (Fig.1'-5') and returns for retainer remake at 19 (Fig.1''-5''). 

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Xin Wei, DDS, PhD, MS 1st edition 12/10/2019, last revision 12/15/2019