FIGURE 1.

A, pretreatment (T1 model); B, 12 months after treatment (T2 model); C, landmarks placed on T2 model before registration, these 6 landmarks were used to obtain the coordinates after the 3 methods of registration; D, landmarks placed on T1 and T2 models for the landmarks-based registration on the posterior teeth (R1); E, T2 model registered on T1 model using the R1 method; F, landmarks placed on T1 and T2 models for the landmarks-based registration on the palate (R2); G, T2 model registered on T1 model using the R2 method; H, regions of interest created around the palatal landmarks on T1 and T2 models for the registration on the palate using regions of interest (R3); I, T2 model registered on T1 model using the R3 method