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The International Journal of Adult Orthodontics & Orthogathic Surgery
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International Journal of Adult Orthodontics and Orthognathic Surgery

Year 1994
Volume 9 , Issue 2

Pages: 141 - 152

The accuracy of computerized prediction of the soft tissue profile: A study of 25 patients treated by means of the Le Fort I osteotomy


This study was performed to compare the soft tissue movement in facial profile predicted by a computer package with those that had actually occurred following a maxillary advancement osteotomy. The source of the material was serial lateral cephalograms for 25 conseutive patients who had received similar Le Fort I osteotomies primarily to correct an anteroposterior skeletal discrepancy. Many of the digitized points on the soft tissue profile were surprisingly well predicted by the computer package. The chin and profile changes resulting from mandibular autorotation and/or a genioplasty were generally predicted accurately. However, in some cases prediction was less consistent, particularly in the region of the nose and upper lip. In this latter group of patients, initial size, thickness, and morphology of the soft tissues appeared to be important factors to which some consideration could be given in the furtehr refinement of this type of software.


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