Fig. 3

(A) Grouping about retraction treatment: Model C0 Control, Model C1 Posterior MI, Model C2 Anterior MI, Model C3 Palatal Plate, Model C4 Lingual Retractor, Model F0 Fix Appliance. Red arrow represents the applied force loading (150 g) from precision cutting or hook to Micro-implants. Black arrow represents the same activation (0.2 mm retraction) of anterior teeth. (B) Details of Model C1, Model C2, Model C3 and Model C4, the distance from the traction point to the occlusion plane is 18.54 mm