Figure 3
(3-1) The angle between U1 (maxillary central incisor) and alveolar bone surface before and after the treatment; (a) the angle between U1-LAS (labial surface line of maxillary central incisor) and LAS (labial alveolar bone surface) before and after treatment. (b) The angle between U1-L1 (lingual surface line of maxillary central incisor) and PAS (palatal alveolar bone surface) before and after treatment. (3-2) Palatal contour measurements; PP-PAS angle of palatal plane to palatal alveolar surface line; PAS-U1 axis angle of palatal alveolar surface to U1 axis; Palatal surface angle angle of palatal horizontal and vertical surface line.
