Fig.2: The top front teeth (including canine #3) are far too forward. In order to move the front teeth backward (arrow), the tooth behind the top canine will be extracted.
Fig.2' (one-year follow-up): When the top canine is moved behind the bottom one, tooth alignment looks good.
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Xin Wei, DDS, PhD, MS 1st edition 11/23/2013, last revision 06/18/2016