Aim: To evaluate the high level of congruence, reached with the Incognito lingual orthodontic technique, between the fabricated setups and the final clinical result by model scan.

Materials and Methods: A sample of 4 patients (1M, 3F, mean age 31,7y) was collected at the Department of Orthodontics of the University of Rome “Tor Vergata”. They were all treated by the same operator with the Incognito lingual technique in both dental arches (included second molars) and debonded between January 2012 and December 2012. None of the patients had rebonded brackets. They all had a Class I, II or III malocclusion and the initial crowding was more than 4 mm. For each patient the following records were required: pretreatment dental casts, pretreatment setup, posttreatment dental casts, pretreatment and posttreatment cephalograms and panoramic radiographs, and pretreatment, interim and posttreatment photographs. Pre-treatment setups and posttreatment dental casts were scanned and superimposed.

Conclusion: The advantage of an individual lingual appliance consists in the accuracy in tooth positioning. Incognito technique was accurate in achieving the tooth movement planned in the setup. The most discrepancies in position were within +/- 0.4 mm.

Results: Discrepancies in transversal position between the setup and outcome were small for all teeth (+/-0.4mm) except for the second molars (+/-1mm)

(see to the right the upper and lower overlay)

Benito Paolo Chiodo, Daniele Oddo, Valeria Paoloni

Department of Orthodontics: Prof. Paola Cozza

Archs to treat Archs scan Set-up Incognito project Incognito bonding Treated archs

Incognito Lingual Orthodontic Technique: Predictability of the Results