Figure 4: The steps in manufacturing of the customized lingual appliance Incognito® (3M-Unitek, Monrovia, Calif) a) digital malocclusion model, b) set-up model based on orthodontist’s prescription, c) set-up model and malocclusion model superimposed allows visualization of the required tooth movement. d) Virtual brackets designed with customized virtual wire as close as possible to the tooth surface to minimise appliance profile. e) Brackets are printed in was, f) brackets casted in gold, g) wire-bending robot manufacturing the custom wires, h) custom wire individual to the patient. (e,f and g with permission from 3M-Unitek, Monrovia, Calif)