... Angle Orthod. 1 977 ; 47: 11 9 -12 2. 10 . Ribarevski R, Vig P, Vig K, Weygand R, O’Brien K. Consistency of orthodontic extraction decisions. Eur J Orthod. 19 96 ;18 :77 -80. 11 . Proffit WR. The evolution of ... Southeast33.04 % - Midwest 13 . 91 % - Northwest 7. 83 % - Southwest0.43 % - Canada Region of practice 21. 12 % - Northeast22.84 % - Southeast26.29 % - Midwest 18 . 97 % - Northwest 10 .34 % - Southwest0.43 ... Am J Orthod Dentofacial Orthop. 2 011 ;13 9:e 17 5 -e1 81. 16 . Proffit WR, Fields HW, Sarver DM. Contemporary Orthodontics. 4th Ed. St. Louis, MO: Mosby; 20 07. 17 . Graber TM, Vanarsdall RL, Vig KWL....