Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40510-018-0255-8/MediaObjects/40510_2018_255_Fig2_HTML.png)
Movement patterns when archwires of 0.021, 0.018, and 0.016 in. are inserted into brackets of 0.022 in.. Lingual tipping and extrusion of the incisor increased when decreasing the archwire size. Movements of the posterior teeth were about the same irrespective of the archwire size. a 0.021 in. b 0.018 in. c 0.016 in