Fig. 4

Generation of absolute color mapping and measurement of landmarks. Green indicates that the amount of soft tissue change did not exceed the tolerance level and the reading is close to zero; blue indicates that the soft tissue became flat or depressed and the reading is negative, indicating that the orthodontic treatment had caused a negative change in the soft tissue, manifesting as an inward depression; red indicates that the soft tissue became more convex and the reading was positive, indicating that the orthodontic treatment had caused a positive change in the soft tissue, manifesting as an outward protrusion