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A 13-year-old man has protrusive lips (Fig.1) with upper midline deviation to the left (Fig.2). After extraction of 1st bi, place open coil spring between UL1-3 and distalize UR3 using UR5/6 as anchor.
Xin Wei, DDS, PhD, MS 1st edition 02/04/2018, last revision 10/03/2020