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For sagittal and vertical classification, angle formed between points A, N, and B (ANB) and SN-GoGn were measured by SimPlant Pro 2011 (Materialise NV Materialise). Before Digital Imaging and Communications in Medicine (DICOM) data was obtained, the midsagittal plane was constructed by NNT viewer software (Newtom QR, Verona, Italy) and the sagittal slice plane of the incisors was established. For standardization, the right lower central incisor was selected but if any rotation of the right central incisor existed, the un-rotated left lower central incisor was evaluated in sagittal cross-sectional slices at the buccal and lingual surfaces, which were parallel to the midsagittal plane. Secondary reconstruction generates three-dimensional (3D) projections of images with maximum intensity for making linear measurements. Primary and secondary reconstructions of the data were performed with Mimics software (trial version 14.01) (Materialise, Leuven, Belgium). It may be assumed that both growth modification and dental camouflage treatments necessitates forward movement of the lower dental arch. 1 According to Proffit and Fields, 2 even in the most favorable circumstances no more than half of the changes needed to correct a Class II malocclusion in an adolescent would be gained by differential jaw growth. This is because Class II elastics are often overused as a way to decrease overjet, causing both instability and stress to the labial periodontal support of the mandibular incisors.

1 At the same time, correction of Class II malocclusions can lead to excessive proclination of the mandibular incisors. However, dental camouflage with upper first premolar extraction carries the risk of over-retraction of the maxillary incisors and may result in an obtuse nasolabial angle and compromised soft tissue profile, especially if the lower incisors are not proclined to meet the upper incisors in a proper overbite/overjet relationship. Correction of Class II malocclusions includes growth modification, dental camouflage, and orthognathic surgery.

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