Measurement of the amount of incisor and molar movement in the maxilla. To measure the amount of incisor and molar movement, the maxilla was superimposed at ANS with palatal plane and distance change such as retraction of maxillary central incisor (U1 loss) and mesial movement of maxillary first molar (U6 loss) were measured on the posttreatment occlusal plane from the projection point of the maxillary central incisor edge (U1E) and the mesial contact point of the maxillary first molars (UM) from pre- and posttreatment lateral cephalograms